Yet more Rubocopping

Data/Scripts/001_Technical/001_Debugging/001_PBDebug.rb

@@ -7,7 +7,7 @@ module PBDebug
     rescue
       PBDebug.log("")
       PBDebug.log("**Exception: #{$!.message}")
-      PBDebug.log("#{$!.backtrace.inspect}")
+      PBDebug.log($!.backtrace.inspect.to_s)
       PBDebug.log("")
       pbPrintException($!)   # if $INTERNAL
       PBDebug.flush

Data/Scripts/001_Technical/001_Debugging/003_Errors.rb

@@ -37,7 +37,7 @@ def pbPrintException(e)
     message += "Exception: #{e.class}\r\n"
     message += "Message: "
   end
-  message += "#{emessage}"
+  message += emessage
   # show last 10/25 lines of backtrace
   if !e.is_a?(EventScriptError)
     message += "\r\n\r\nBacktrace:\r\n"

Data/Scripts/001_Technical/002_Files/001_FileTests.rb

@@ -378,7 +378,7 @@ class StringInput
           f = super
           yield f
         ensure
-          f.close if f
+          f&.close
         end
       else
         super

Data/Scripts/001_Technical/002_Files/002_FileMixins.rb

@@ -137,7 +137,7 @@ class StringInput
   end
 
   def each_byte
-    while !eof?
+    until eof?
       yield getc
     end
   end

Data/Scripts/001_Technical/003_Intl_Messages.rb

@@ -69,7 +69,7 @@ def pbSetTextMessages
             neednewline = false
           end
           if list.code == 101
-            lastitem += "#{list.parameters[0]}"
+            lastitem += list.parameters[0].to_s
             neednewline = true
           elsif list.code == 102
             list.parameters[0].length.times do |k|
@@ -78,7 +78,7 @@ def pbSetTextMessages
             neednewline = false
           elsif list.code == 401
             lastitem += " " if lastitem != ""
-            lastitem += "#{list.parameters[0]}"
+            lastitem += list.parameters[0].to_s
             neednewline = true
           elsif list.code == 355 || list.code == 655
             pbAddScriptTexts(items, list.parameters[0])
@@ -93,14 +93,12 @@ def pbSetTextMessages
             end
           end
         end
-        if neednewline
-          if lastitem != ""
+        if neednewline && lastitem != ""
           items.push(lastitem)
           lastitem = ""
         end
       end
     end
-    end
     if Time.now.to_i - t >= 5
       t = Time.now.to_i
       Graphics.update
@@ -140,7 +138,7 @@ def pbSetTextMessages
                 neednewline = false
               end
               if list.code == 101
-                lastitem += "#{list.parameters[0]}"
+                lastitem += list.parameters[0].to_s
                 neednewline = true
               elsif list.code == 102
                 list.parameters[0].length.times do |k|
@@ -149,7 +147,7 @@ def pbSetTextMessages
                 neednewline = false
               elsif list.code == 401
                 lastitem += " " if lastitem != ""
-                lastitem += "#{list.parameters[0]}"
+                lastitem += list.parameters[0].to_s
                 neednewline = true
               elsif list.code == 355 || list.code == 655
                 pbAddScriptTexts(items, list.parameters[0])
@@ -164,15 +162,13 @@ def pbSetTextMessages
                 end
               end
             end
-            if neednewline
-              if lastitem != ""
+            if neednewline && lastitem != ""
               items.push(lastitem)
               lastitem = ""
             end
           end
         end
       end
-      end
       if Time.now.to_i - t >= 5
         t = Time.now.to_i
         Graphics.update
@@ -210,7 +206,7 @@ def pbEachIntlSection(file)
         sectionname = $~[1]
         havesection = true
       else
-        if sectionname == nil
+        if sectionname.nil?
           raise _INTL("Expected a section at the beginning of the file (line {1})", lineno)
         end
         lastsection.push(line.gsub(/\s+$/, ""))
@@ -739,7 +735,7 @@ def _INTL(*arg)
   end
   string = string.clone
   (1...arg.length).each do |i|
-    string.gsub!(/\{#{i}\}/, "#{arg[i]}")
+    string.gsub!(/\{#{i}\}/, arg[i].to_s)
   end
   return string
 end
@@ -770,7 +766,7 @@ def _MAPINTL(mapid, *arg)
   string = MessageTypes.getFromMapHash(mapid, arg[0])
   string = string.clone
   (1...arg.length).each do |i|
-    string.gsub!(/\{#{i}\}/, "#{arg[i]}")
+    string.gsub!(/\{#{i}\}/, arg[i].to_s)
   end
   return string
 end

Data/Scripts/001_Technical/005_PluginManager.rb

@@ -319,10 +319,10 @@ module PluginManager
         value = [value] if value.is_a?(String)
         if value.is_a?(Array)
           value.each do |entry|
-            if !entry.is_a?(String)
-              self.error("Plugin '#{name}'s credits array contains a non-string value.")
-            else
+            if entry.is_a?(String)
               credits << entry
+            else
+              self.error("Plugin '#{name}'s credits array contains a non-string value.")
             end
           end
         else
@@ -333,7 +333,7 @@ module PluginManager
       end
     end
     @@Plugins.values.each do |plugin|
-      if plugin[:incompatibilities] && plugin[:incompatibilities].include?(name)
+      if plugin[:incompatibilities]&.include?(name)
         self.error("Plugin '#{plugin[:name]}' is incompatible with '#{name}'. " +
                    "They cannot both be used at the same time.")
       end
@@ -475,7 +475,7 @@ module PluginManager
     print("#{message}\r\nThis exception was logged in #{errorlogline}.\r\nHold Ctrl when closing this message to copy it to the clipboard.")
     # Give a ~500ms coyote time to start holding Control
     t = System.delta
-    until (System.delta - t) >= 500000
+    until (System.delta - t) >= 500_000
       Input.update
       if Input.press?(Input::CTRL)
         Input.clipboard = message

Data/Scripts/001_Technical/006_RPG_Sprite.rb

@@ -6,13 +6,11 @@ class SpriteAnimation
     @sprite = sprite
   end
 
-  %w[
-    x y ox oy viewport flash src_rect opacity tone
-  ].each_with_index do |s, _i|
+  ["x", "y", "ox", "oy", "viewport", "flash", "src_rect", "opacity", "tone"].each do |def_name|
     eval <<-__END__
 
-  def #{s}(*arg)
-    @sprite.#{s}(*arg)
+  def #{def_name}(*arg)
+    @sprite.#{def_name}(*arg)
   end
 
     __END__
@@ -30,7 +28,7 @@ class SpriteAnimation
   def animation(animation, hit, height = 3)
     dispose_animation
     @_animation = animation
-    return if @_animation == nil
+    return if @_animation.nil?
     @_animation_hit      = hit
     @_animation_height   = height
     @_animation_duration = @_animation.frame_max
@@ -66,7 +64,7 @@ class SpriteAnimation
     return if animation == @_loop_animation
     dispose_loop_animation
     @_loop_animation = animation
-    return if @_loop_animation == nil
+    return if @_loop_animation.nil?
     @_loop_animation_index = 0
     fr = 20
     if @_animation.name[/\[\s*(\d+?)\s*\]\s*$/]
@@ -92,7 +90,7 @@ class SpriteAnimation
   end
 
   def dispose_animation
-    return if @_animation_sprites == nil
+    return if @_animation_sprites.nil?
     sprite = @_animation_sprites[0]
     if sprite != nil
       @@_reference_count[sprite.bitmap] -= 1
@@ -108,7 +106,7 @@ class SpriteAnimation
   end
 
   def dispose_loop_animation
-    return if @_loop_animation_sprites == nil
+    return if @_loop_animation_sprites.nil?
     sprite = @_loop_animation_sprites[0]
     if sprite != nil
       @@_reference_count[sprite.bitmap] -= 1
@@ -195,7 +193,7 @@ class SpriteAnimation
     16.times do |i|
       sprite = sprites[i]
       pattern = cell_data[i, 0]
-      if sprite == nil || pattern == nil || pattern == -1
+      if sprite.nil? || pattern.nil? || pattern == -1
         sprite.visible = false if sprite != nil
         next
       end
@@ -377,7 +375,7 @@ module RPG
 
     def pushAnimation(array, anim)
       array.length.times do |i|
-        next if array[i] && array[i].active?
+        next if array[i]&.active?
         array[i] = anim
         return
       end
@@ -397,7 +395,7 @@ module RPG
     end
 
     def dispose_damage
-      return if @_damage_sprite == nil
+      return if @_damage_sprite.nil?
       @_damage_sprite.bitmap.dispose
       @_damage_sprite.dispose
       @_damage_sprite   = nil
@@ -406,14 +404,14 @@ module RPG
 
     def dispose_animation
       @animations.each do |a|
-        a.dispose_animation if a
+        a&.dispose_animation
       end
       @animations.clear
     end
 
     def dispose_loop_animation
       @loopAnimations.each do |a|
-        a.dispose_loop_animation if a
+        a&.dispose_loop_animation
       end
       @loopAnimations.clear
     end
@@ -501,13 +499,13 @@ module RPG
 
     def update_animation
       @animations.each do |a|
-        a.update_animation if a && a.active?
+        a.update_animation if a&.active?
       end
     end
 
     def update_loop_animation
       @loopAnimations.each do |a|
-        a.update_loop_animation if a && a.active?
+        a.update_loop_animation if a&.active?
       end
     end
 

Data/Scripts/003_Game processing/001_StartGame.rb

@@ -38,7 +38,7 @@ module Game
   # Called when starting a new game. Initializes global variables
   # and transfers the player into the map scene.
   def self.start_new
-    if $game_map && $game_map.events
+    if $game_map&.events
       $game_map.events.each_value { |event| event.clear_starting }
     end
     $game_temp.common_event_id = 0 if $game_temp

Data/Scripts/003_Game processing/002_Scene_Map.rb

@@ -61,8 +61,8 @@ class Scene_Map
         pbBGMFade(0.8)
       end
     end
-    if playingBGS && map.autoplay_bgs
-      pbBGMFade(0.8) if playingBGS.name != map.bgs.name
+    if playingBGS && map.autoplay_bgs && playingBGS.name != map.bgs.name
+      pbBGMFade(0.8)
     end
     Graphics.frame_reset
   end
@@ -145,12 +145,12 @@ class Scene_Map
     end
     keys = @spritesets.keys.clone
     keys.each do |i|
-      if !$map_factory.hasMap?(i)
-        @spritesets[i].dispose if @spritesets[i]
+      if $map_factory.hasMap?(i)
+        @spritesets[i].update
+      else
+        @spritesets[i]&.dispose
         @spritesets[i] = nil
         @spritesets.delete(i)
-      else
-        @spritesets[i].update
       end
     end
     @spritesetGlobal.update

Data/Scripts/003_Game processing/003_Interpreter.rb

@@ -304,7 +304,7 @@ class Interpreter
   def pbEraseThisEvent
     if $game_map.events[@event_id]
       $game_map.events[@event_id].erase
-      $PokemonMap.addErasedEvent(@event_id) if $PokemonMap
+      $PokemonMap&.addErasedEvent(@event_id)
     end
     @index += 1
     return true
@@ -407,7 +407,7 @@ class Interpreter
     when 6 then event.move_right
     when 8 then event.move_up
     end
-    $PokemonMap.addMovedEvent(@event_id) if $PokemonMap
+    $PokemonMap&.addMovedEvent(@event_id)
     if old_x != event.x || old_y != event.y
       $game_player.lock
       loop do
@@ -443,7 +443,7 @@ class Interpreter
   def pbTrainerEnd
     pbGlobalUnlock
     event = get_self
-    event.erase_route if event
+    event&.erase_route
   end
 
   def setPrice(item, buy_price = -1, sell_price = -1)

Data/Scripts/003_Game processing/004_Interpreter_Commands.rb

@@ -414,8 +414,8 @@ class Interpreter
   #-----------------------------------------------------------------------------
   def command_116
     if @event_id > 0
-      $game_map.events[@event_id].erase if $game_map.events[@event_id]
-      $PokemonMap.addErasedEvent(@event_id) if $PokemonMap
+      $game_map.events[@event_id]&.erase
+      $PokemonMap&.addErasedEvent(@event_id)
     end
     @index += 1
     return false
@@ -512,10 +512,10 @@ class Interpreter
         next if $game_variables[i] == value
         $game_variables[i] = value
       when 1   # add
-        next if $game_variables[i] >= 99999999
+        next if $game_variables[i] >= 99_999_999
         $game_variables[i] += value
       when 2   # subtract
-        next if $game_variables[i] <= -99999999
+        next if $game_variables[i] <= -99_999_999
         $game_variables[i] -= value
       when 3   # multiply
         next if value == 1
@@ -527,8 +527,8 @@ class Interpreter
         next if [0, 1].include?(value)
         $game_variables[i] %= value
       end
-      $game_variables[i] = 99999999 if $game_variables[i] > 99999999
-      $game_variables[i] = -99999999 if $game_variables[i] < -99999999
+      $game_variables[i] = 99_999_999 if $game_variables[i] > 99_999_999
+      $game_variables[i] = -99_999_999 if $game_variables[i] < -99_999_999
       $game_map.need_refresh = true
     end
     return true

Data/Scripts/004_Game classes/001_Game_Screen.rb

@@ -142,7 +142,7 @@ end
 def pbToneChangeAll(tone, duration)
   $game_screen.start_tone_change(tone, duration * Graphics.frame_rate / 20)
   $game_screen.pictures.each do |picture|
-    picture.start_tone_change(tone, duration * Graphics.frame_rate / 20) if picture
+    picture&.start_tone_change(tone, duration * Graphics.frame_rate / 20)
   end
 end
 

Data/Scripts/004_Game classes/002_Game_System.rb

@@ -61,11 +61,10 @@ class Game_System
 
   def bgm_play_internal(bgm, position) # :nodoc:
     @bgm_position = position if !@bgm_paused
-    @playing_bgm = (bgm == nil) ? nil : bgm.clone
+    @playing_bgm = bgm&.clone
     if bgm != nil && bgm.name != ""
-      if FileTest.audio_exist?("Audio/BGM/" + bgm.name)
-        bgm_play_internal2("Audio/BGM/" + bgm.name,
-                           bgm.volume, bgm.pitch, @bgm_position) if !@defaultBGM
+      if !@defaultBGM && FileTest.audio_exist?("Audio/BGM/" + bgm.name)
+        bgm_play_internal2("Audio/BGM/" + bgm.name, bgm.volume, bgm.pitch, @bgm_position)
       end
     else
       @bgm_position = position if !@bgm_paused
@@ -161,7 +160,7 @@ class Game_System
 ################################################################################
 
   def bgs_play(bgs)
-    @playing_bgs = (bgs == nil) ? nil : bgs.clone
+    @playing_bgs = (bgs.nil?) ? nil : bgs.clone
     if bgs != nil && bgs.name != ""
       if FileTest.audio_exist?("Audio/BGS/" + bgs.name)
         vol = bgs.volume
@@ -258,7 +257,7 @@ class Game_System
 ################################################################################
 
   def windowskin_name
-    if @windowskin_name == nil
+    if @windowskin_name.nil?
       return $data_system.windowskin_name
     else
       return @windowskin_name

Data/Scripts/004_Game classes/003_Game_Picture.rb

@@ -66,7 +66,7 @@ class Game_Picture
     @zoom_x = zoom_x.to_f
     @zoom_y = zoom_y.to_f
     @opacity = opacity.to_f
-    @blend_type = blend_type ? blend_type : 0
+    @blend_type = blend_type || 0
     @duration = 0
     @target_x = @x
     @target_y = @y
@@ -98,7 +98,7 @@ class Game_Picture
     @target_zoom_x  = zoom_x.to_f
     @target_zoom_y  = zoom_y.to_f
     @target_opacity = opacity.to_f
-    @blend_type     = blend_type ? blend_type : 0
+    @blend_type     = blend_type || 0
   end
   #-----------------------------------------------------------------------------
   # * Change Rotation Speed

Data/Scripts/004_Game classes/004_Game_Map.rb

@@ -193,7 +193,7 @@ class Game_Map
       if self_event != nil && terrain.can_surf_freely
         [2, 1, 0].each do |j|
           facing_tile_id = data[newx, newy, j]
-          return false if facing_tile_id == nil
+          return false if facing_tile_id.nil?
           facing_terrain = GameData::TerrainTag.try_get(@terrain_tags[facing_tile_id])
           if facing_terrain.id != :None && !facing_terrain.ignore_passability
             return facing_terrain.can_surf_freely
@@ -207,7 +207,7 @@ class Game_Map
         # Can't walk onto ledges
         [2, 1, 0].each do |j|
           facing_tile_id = data[newx, newy, j]
-          return false if facing_tile_id == nil
+          return false if facing_tile_id.nil?
           facing_terrain = GameData::TerrainTag.try_get(@terrain_tags[facing_tile_id])
           return false if facing_terrain.ledge
           break if facing_terrain.id != :None && !facing_terrain.ignore_passability
@@ -326,7 +326,7 @@ class Game_Map
       max_x = (self.width - (Graphics.width.to_f / TILE_WIDTH)) * REAL_RES_X
       @display_x = [0, [@display_x, max_x].min].max
     end
-    $map_factory.setMapsInRange if $map_factory
+    $map_factory&.setMapsInRange
   end
 
   def display_y=(value)
@@ -336,7 +336,7 @@ class Game_Map
       max_y = (self.height - (Graphics.height.to_f / TILE_HEIGHT)) * REAL_RES_Y
       @display_y = [0, [@display_y, max_y].min].max
     end
-    $map_factory.setMapsInRange if $map_factory
+    $map_factory&.setMapsInRange
   end
 
   def scroll_up(distance)

Data/Scripts/004_Game classes/005_Game_Map_Autoscroll.rb

@@ -93,7 +93,22 @@ class Interpreter
     max_y = ($game_map.height - (Graphics.height.to_f / Game_Map::TILE_HEIGHT)) * 4 * Game_Map::TILE_HEIGHT
     count_x = ($game_map.display_x - [0, [(x * Game_Map::REAL_RES_X) - center_x, max_x].min].max) / Game_Map::REAL_RES_X
     count_y = ($game_map.display_y - [0, [(y * Game_Map::REAL_RES_Y) - center_y, max_y].min].max) / Game_Map::REAL_RES_Y
-    if !@diag
+    if @diag
+      @diag = false
+      dir = nil
+      if count_x != 0 && count_y != 0
+        return false
+      elsif count_x > 0
+        dir = 4
+      elsif count_x < 0
+        dir = 6
+      elsif count_y > 0
+        dir = 8
+      elsif count_y < 0
+        dir = 2
+      end
+      count = count_x == 0 ? count_y.abs : count_x.abs
+    else
       @diag = true
       dir = nil
       if count_x > 0
@@ -110,21 +125,6 @@ class Interpreter
         end
       end
       count = [count_x.abs, count_y.abs].min
-    else
-      @diag = false
-      dir = nil
-      if count_x != 0 && count_y != 0
-        return false
-      elsif count_x > 0
-        dir = 4
-      elsif count_x < 0
-        dir = 6
-      elsif count_y > 0
-        dir = 8
-      elsif count_y < 0
-        dir = 2
-      end
-      count = count_x != 0 ? count_x.abs : count_y.abs
     end
     $game_map.start_scroll(dir, count, speed) if dir != nil
     if @diag

Data/Scripts/004_Game classes/006_Game_MapFactory.rb

@@ -185,10 +185,10 @@ class PokemonMapFactory
       return false if !event.through && event.character_name != ""
     end
     # Check passability of player
-    if !thisEvent.is_a?(Game_Player)
-      if $game_map.map_id == mapID && $game_player.x == x && $game_player.y == y
-        return false if !$game_player.through && $game_player.character_name != ""
-      end
+    if !thisEvent.is_a?(Game_Player) &&
+       $game_map.map_id == mapID && $game_player.x == x && $game_player.y == y &&
+       !$game_player.through && $game_player.character_name != ""
+      return false
     end
     return true
   end
@@ -201,8 +201,8 @@ class PokemonMapFactory
     return false if !map.valid?(x, y)
     return true if thisEvent.through
     if thisEvent == $game_player
-      if !($DEBUG && Input.press?(Input::CTRL))
-        return false if !map.passableStrict?(x, y, 0, thisEvent)
+      if !($DEBUG && Input.press?(Input::CTRL)) && !map.passableStrict?(x, y, 0, thisEvent)
+        return false
       end
     elsif !map.passableStrict?(x, y, 0, thisEvent)
       return false
@@ -289,12 +289,12 @@ class PokemonMapFactory
 
   # NOTE: Assumes the event is 1x1 tile in size. Only returns one tile.
   def getFacingTile(direction = nil, event = nil, steps = 1)
-    event = $game_player if event == nil
+    event = $game_player if event.nil?
     return [0, 0, 0] if !event
     x = event.x
     y = event.y
     id = event.map.map_id
-    direction = event.direction if direction == nil
+    direction = event.direction if direction.nil?
     return getFacingTileFromPos(id, x, y, direction, steps)
   end
 
@@ -511,6 +511,6 @@ end
 def updateTilesets
   maps = $map_factory.maps
   maps.each do |map|
-    map.updateTileset if map
+    map&.updateTileset
   end
 end

Data/Scripts/004_Game classes/007_Game_Character.rb

@@ -244,8 +244,9 @@ class Game_Character
       next if self == event || !event.at_coordinate?(new_x, new_y) || event.through
       return false if self != $game_player || event.character_name != ""
     end
-    if $game_player.x == new_x && $game_player.y == new_y
-      return false if !$game_player.through && @character_name != ""
+    if $game_player.x == new_x && $game_player.y == new_y &&
+       !$game_player.through && @character_name != ""
+      return false
     end
     return true
   end
@@ -356,7 +357,7 @@ class Game_Character
   end
 
   def force_move_route(move_route)
-    if @original_move_route == nil
+    if @original_move_route.nil?
       @original_move_route       = @move_route
       @original_move_route_index = @move_route_index
     end

Data/Scripts/004_Game classes/008_Game_Event.rb

@@ -99,7 +99,7 @@ class Game_Event < Game_Character
     return $PokemonGlobal.eventvars[[@map_id, @event.id]].to_i
   end
 
-  def expired?(secs = 86400)
+  def expired?(secs = 86_400)
     ontime = self.variable
     time = pbGetTimeNow
     return ontime && (time.to_i > ontime + secs)
@@ -109,8 +109,8 @@ class Game_Event < Game_Character
     ontime = self.variable.to_i
     return false if !ontime
     now = pbGetTimeNow
-    elapsed = (now.to_i - ontime) / 86400
-    elapsed += 1 if (now.to_i - ontime) % 86400 > ((now.hour * 3600) + (now.min * 60) + now.sec)
+    elapsed = (now.to_i - ontime) / 86_400
+    elapsed += 1 if (now.to_i - ontime) % 86_400 > ((now.hour * 3600) + (now.min * 60) + now.sec)
     return elapsed >= days
   end
 
@@ -141,12 +141,12 @@ class Game_Event < Game_Character
 
   def pbCheckEventTriggerAfterTurning
     return if $game_system.map_interpreter.running? || @starting
-    if @event.name[/trainer\((\d+)\)/i]
+    return if @trigger != 2   # Event touch
+    return if !@event.name[/trainer\((\d+)\)/i]
     distance = $~[1].to_i
-      if @trigger == 2 && pbEventCanReachPlayer?(self, $game_player, distance)
-        start if !jumping? && !over_trigger?
-      end
-    end
+    return if !pbEventCanReachPlayer?(self, $game_player, distance)
+    return if jumping? || over_trigger?
+    start
   end
 
   def check_event_trigger_touch(dir)
@@ -170,8 +170,8 @@ class Game_Event < Game_Character
   def check_event_trigger_auto
     case @trigger
     when 2   # Event touch
-      if at_coordinate?($game_player.x, $game_player.y)
-        start if !jumping? && over_trigger?
+      if at_coordinate?($game_player.x, $game_player.y) && !jumping? && over_trigger?
+        start
       end
     when 3   # Autorun
       start
@@ -197,7 +197,7 @@ class Game_Event < Game_Character
     return if new_page == @page
     @page = new_page
     clear_starting
-    if @page == nil
+    if @page.nil?
       @tile_id        = 0
       @character_name = ""
       @character_hue  = 0

Data/Scripts/004_Game classes/009_Game_Player.rb

@@ -185,13 +185,12 @@ class Game_Player < Game_Character
     return result if checkIfRunning && $game_system.map_interpreter.running?
     # All event loops
     $game_map.events.values.each do |event|
+      next if !triggers.include?(event.trigger)
       next if !event.name[/trainer\((\d+)\)/i]
       distance = $~[1].to_i
-      # If event coordinates and triggers are consistent
-      if pbEventCanReachPlayer?(event, self, distance) && triggers.include?(event.trigger)
-        # If starting determinant is front event (other than jumping)
-        result.push(event) if !event.jumping? && !event.over_trigger?
-      end
+      next if !pbEventCanReachPlayer?(event, self, distance)
+      next if event.jumping? || event.over_trigger?
+      result.push(event)
     end
     return result
   end
@@ -202,13 +201,12 @@ class Game_Player < Game_Character
     return result if checkIfRunning && $game_system.map_interpreter.running?
     # All event loops
     $game_map.events.values.each do |event|
+      next if !triggers.include?(event.trigger)
       next if !event.name[/counter\((\d+)\)/i]
       distance = $~[1].to_i
-      # If event coordinates and triggers are consistent
-      if pbEventFacesPlayer?(event, self, distance) && triggers.include?(event.trigger)
-        # If starting determinant is front event (other than jumping)
-        result.push(event) if !event.jumping? && !event.over_trigger?
-      end
+      next if !pbEventFacesPlayer?(event, self, distance)
+      next if event.jumping? || event.over_trigger?
+      result.push(event)
     end
     return result
   end
@@ -355,34 +353,31 @@ class Game_Player < Game_Character
     return false if !$game_map.valid?(new_x, new_y)
     # All event loops
     $game_map.events.values.each do |event|
+      next if !triggers.include?(event.trigger)
       # If event coordinates and triggers are consistent
       next if !event.at_coordinate?(new_x, new_y)
-      next if !triggers.include?(event.trigger)
       # If starting determinant is front event (other than jumping)
       next if event.jumping? || event.over_trigger?
       event.start
       result = true
     end
     # If fitting event is not found
-    if result == false
-      # If front tile is a counter
-      if $game_map.counter?(new_x, new_y)
+    if result == false && $game_map.counter?(new_x, new_y)
       # Calculate coordinates of 1 tile further away
       new_x += (@direction == 6 ? 1 : @direction == 4 ? -1 : 0)
       new_y += (@direction == 2 ? 1 : @direction == 8 ? -1 : 0)
       return false if !$game_map.valid?(new_x, new_y)
       # All event loops
       $game_map.events.values.each do |event|
+        next if !triggers.include?(event.trigger)
         # If event coordinates and triggers are consistent
         next if !event.at_coordinate?(new_x, new_y)
-          next if !triggers.include?(event.trigger)
         # If starting determinant is front event (other than jumping)
         next if event.jumping? || event.over_trigger?
         event.start
         result = true
       end
     end
-    end
     return result
   end
 
@@ -559,11 +554,10 @@ end
 def pbGetPlayerCharset(charset, trainer = nil, force = false)
   trainer = $player if !trainer
   outfit = (trainer) ? trainer.outfit : 0
-  if $game_player && $game_player.charsetData && !force
-    return nil if $game_player.charsetData[0] == trainer.character_ID &&
+  return nil if !force && $game_player&.charsetData &&
+                $game_player.charsetData[0] == trainer.character_ID &&
                 $game_player.charsetData[1] == charset &&
                 $game_player.charsetData[2] == outfit
-  end
   $game_player.charsetData = [trainer.character_ID, charset, outfit] if $game_player
   ret = charset
   if pbResolveBitmap("Graphics/Characters/" + ret + "_" + outfit.to_s)

Data/Scripts/004_Game classes/010_Game_CommonEvent.rb

@@ -56,7 +56,7 @@ class Game_CommonEvent
   def refresh
     # Create an interpreter for parallel process if necessary
     if self.trigger == 2 && switchIsOn?(self.switch_id)
-      if @interpreter == nil
+      if @interpreter.nil?
         @interpreter = Interpreter.new
       end
     else

Data/Scripts/005_Sprites/001_Sprite_Picture.rb

@@ -7,11 +7,11 @@ class Sprite_Picture
   end
 
   def dispose
-    @sprite.dispose if @sprite
+    @sprite&.dispose
   end
 
   def update
-    @sprite.update if @sprite
+    @sprite&.update
     # If picture file name is different from current one
     if @picture_name != @picture.name
       # Remember file name to instance variables
@@ -27,7 +27,7 @@ class Sprite_Picture
     if @picture_name == ""
       # Set sprite to invisible
       if @sprite
-        @sprite.dispose if @sprite
+        @sprite&.dispose
         @sprite = nil
       end
       return

Data/Scripts/005_Sprites/002_Sprite_Timer.rb

@@ -7,7 +7,7 @@ class Sprite_Timer
   end
 
   def dispose
-    @timer.dispose if @timer
+    @timer&.dispose
     @timer = nil
     @disposed = true
   end

Data/Scripts/005_Sprites/003_Sprite_Character.rb

@@ -8,7 +8,7 @@ class BushBitmap
   end
 
   def dispose
-    @bitmaps.each { |b| b.dispose if b }
+    @bitmaps.each { |b| b&.dispose }
   end
 
   def bitmap
@@ -80,13 +80,13 @@ class Sprite_Character < RPG::Sprite
   end
 
   def dispose
-    @bushbitmap.dispose if @bushbitmap
+    @bushbitmap&.dispose
     @bushbitmap = nil
-    @charbitmap.dispose if @charbitmap
+    @charbitmap&.dispose
     @charbitmap = nil
-    @reflection.dispose if @reflection
+    @reflection&.dispose
     @reflection = nil
-    @surfbase.dispose if @surfbase
+    @surfbase&.dispose
     @surfbase = nil
     super
   end
@@ -102,12 +102,12 @@ class Sprite_Character < RPG::Sprite
       @character_name = @character.character_name
       @character_hue  = @character.character_hue
       @oldbushdepth   = @character.bush_depth
-      @charbitmap.dispose if @charbitmap
+      @charbitmap&.dispose
       if @tile_id >= 384
         @charbitmap = pbGetTileBitmap(@character.map.tileset_name, @tile_id,
                                       @character_hue, @character.width, @character.height)
         @charbitmapAnimated = false
-        @bushbitmap.dispose if @bushbitmap
+        @bushbitmap&.dispose
         @bushbitmap = nil
         @spriteoffset = false
         @cw = Game_Map::TILE_WIDTH * @character.width
@@ -121,7 +121,7 @@ class Sprite_Character < RPG::Sprite
         )
         RPG::Cache.retain('Graphics/Characters/', @character_name, @character_hue) if @character == $game_player
         @charbitmapAnimated = true
-        @bushbitmap.dispose if @bushbitmap
+        @bushbitmap&.dispose
         @bushbitmap = nil
         @spriteoffset = @character_name[/offset/i]
         @cw = @charbitmap.width / 4
@@ -163,7 +163,7 @@ class Sprite_Character < RPG::Sprite
       animation(animation, true)
       @character.animation_id = 0
     end
-    @reflection.update if @reflection
-    @surfbase.update if @surfbase
+    @reflection&.update
+    @surfbase&.update
   end
 end

Data/Scripts/005_Sprites/004_Sprite_Reflection.rb

@@ -8,12 +8,10 @@ class Sprite_Reflection
     @event    = event
     @height   = 0
     @fixedheight = false
-    if @event && @event != $game_player
-      if @event.name[/reflection\((\d+)\)/i]
+    if @event != $game_player && @event&.name[/reflection\((\d+)\)/i]
       @height = $~[1].to_i || 0
       @fixedheight = true
     end
-    end
     @viewport = viewport
     @disposed = false
     update
@@ -21,7 +19,7 @@ class Sprite_Reflection
 
   def dispose
     if !@disposed
-      @sprite.dispose if @sprite
+      @sprite&.dispose
       @sprite   = nil
       @disposed = true
     end

Data/Scripts/005_Sprites/005_Sprite_SurfBase.rb

@@ -21,7 +21,7 @@ class Sprite_SurfBase
 
   def dispose
     return if @disposed
-    @sprite.dispose if @sprite
+    @sprite&.dispose
     @sprite   = nil
     @surfbitmap.dispose
     @divebitmap.dispose

Data/Scripts/005_Sprites/007_Spriteset_Map.rb

@@ -122,10 +122,10 @@ class Spriteset_Map
     @character_sprites.each do |sprite|
       sprite.update
     end
-    if self.map != $game_map
-      @weather.fade_in(:None, 0, 20)
-    else
+    if self.map == $game_map
       @weather.fade_in($game_screen.weather_type, $game_screen.weather_max, $game_screen.weather_duration)
+    else
+      @weather.fade_in(:None, 0, 20)
     end
     @weather.ox   = tmox
     @weather.oy   = tmoy

Data/Scripts/005_Sprites/009_Sprite_DynamicShadows.rb

@@ -19,7 +19,7 @@ class Sprite_Shadow < RPG::Sprite
   end
 
   def dispose
-    @chbitmap.dispose if @chbitmap
+    @chbitmap&.dispose
     super
   end
 
@@ -35,7 +35,7 @@ class Sprite_Shadow < RPG::Sprite
       @tile_id        = @character.tile_id
       @character_name = @character.character_name
       @character_hue  = @character.character_hue
-      @chbitmap.dispose if @chbitmap
+      @chbitmap&.dispose
       if @tile_id >= 384
         @chbitmap = pbGetTileBitmap(@character.map.tileset_name,
                                     @tile_id, @character.character_hue)
@@ -89,7 +89,7 @@ class Sprite_Shadow < RPG::Sprite
     @deltay = ScreenPosHelper.pbScreenY(@source) - self.y
     self.color = Color.new(0, 0, 0)
     @distance = ((@deltax**2) + (@deltay**2))
-    self.opacity = @self_opacity * 13000 / ((@distance * 370 / @distancemax) + 6000)
+    self.opacity = @self_opacity * 13_000 / ((@distance * 370 / @distancemax) + 6000)
     self.angle = 57.3 * Math.atan2(@deltax, @deltay)
     @angle_trigo = self.angle + 90
     @angle_trigo += 360 if @angle_trigo < 0
@@ -149,7 +149,7 @@ class Sprite_Character < RPG::Sprite
   end
 
   def clearShadows
-    @ombrelist.each { |s| s.dispose if s }
+    @ombrelist.each { |s| s&.dispose }
     @ombrelist.clear
   end
 
@@ -185,9 +185,8 @@ class Spriteset_Map
     map = $game_map if !map
     map.events.keys.sort.each do |k|
       ev = map.events[k]
-      warn = true if (ev.list != nil && ev.list.length > 0 &&
-         ev.list[0].code == 108 &&
-         (ev.list[0].parameters == ["s"] || ev.list[0].parameters == ["o"]))
+      warn = true if ev.list != nil && ev.list.length > 0 && ev.list[0].code == 108 &&
+                     (ev.list[0].parameters == ["s"] || ev.list[0].parameters == ["o"])
       params = XPML_read(map, "Shadow Source", ev, 4)
       @shadows.push([ev] + params) if params != nil
     end
@@ -225,11 +224,11 @@ end
 #===================================================
 def XPML_read(map, markup, event, max_param_number = 0)
   parameter_list = nil
-  return nil if !event || event.list == nil
+  return nil if !event || event.list.nil?
   event.list.size.times do |i|
     if event.list[i].code == 108 &&
        event.list[i].parameters[0].downcase == "begin " + markup.downcase
-      parameter_list = [] if parameter_list == nil
+      parameter_list = [] if parameter_list.nil?
       ((i + 1)...event.list.size).each do |j|
         if event.list[j].code == 108
           parts = event.list[j].parameters[0].split

Data/Scripts/005_Sprites/010_ParticleEngine.rb

@@ -57,17 +57,17 @@ class Particle_Engine
   def realloc_effect(event, particle)
     type = pbEventCommentInput(event, 1, "Particle Engine Type")
     if type.nil?
-      particle.dispose if particle
+      particle&.dispose
       return nil
     end
     type = type[0].downcase
     cls = @effects[type]
     if cls.nil?
-      particle.dispose if particle
+      particle&.dispose
       return nil
     end
     if !particle || !particle.is_a?(cls)
-      particle.dispose if particle
+      particle&.dispose
       particle = cls.new(event, @viewport)
     end
     return particle
@@ -93,7 +93,7 @@ class Particle_Engine
         particle = realloc_effect(event, particle)
         @effect[i] = particle
       end
-      particle.update if particle
+      particle&.update
     end
   end
 end
@@ -135,7 +135,7 @@ class ParticleSprite
   end
 
   def dispose
-    @sprite.dispose if @sprite
+    @sprite&.dispose
   end
 
   def bitmap=(value)
@@ -517,9 +517,9 @@ class Particle_Engine::Smokescreen < ParticleEffect_Event
     end
     multiple = 1.7
     xgrav = @xgravity * multiple / @slowdown
-    xgrav = -xgrav if (rand(2) == 1)
+    xgrav = -xgrav if rand(2) == 1
     ygrav = @ygravity * multiple / @slowdown
-    ygrav = -ygrav if (rand(2) == 1)
+    ygrav = -ygrav if rand(2) == 1
     @particlex[i] += xgrav
     @particley[i] += ygrav
     @particlex[i] -= @__offsetx

Data/Scripts/005_Sprites/013_ScreenPosHelper.rb

@@ -29,7 +29,7 @@ module ScreenPosHelper
   end
 
   def self.pbScreenZ(ch, height = nil)
-    if height == nil
+    if height.nil?
       height = 0
       if ch.tile_id > 0
         height = 32

Data/Scripts/006_Map renderer/001_TilemapRenderer.rb

@@ -171,7 +171,7 @@ class TilemapRenderer
         bitmap = @bitmaps[filename]
         @frame_counts[filename] = [bitmap.width / SOURCE_TILE_WIDTH, 1].max
         if bitmap.height > SOURCE_TILE_HEIGHT && @bitmap_wraps[filename]
-          @frame_counts[filename] /= 2 if @bitmap_wraps[filename]
+          @frame_counts[filename] /= 2
         end
       end
       return @frame_counts[filename]

Data/Scripts/006_Map renderer/004_TileDrawingHelper.rb

@@ -79,7 +79,7 @@ class TileDrawingHelper
   end
 
   def dispose
-    @tileset.dispose if @tileset
+    @tileset&.dispose
     @tileset = nil
     @autotiles.each_with_index do |autotile, i|
       autotile.dispose
@@ -187,7 +187,7 @@ def bltMinimapAutotile(dstBitmap, x, y, srcBitmap, id)
 end
 
 def passable?(passages, tile_id)
-  return false if tile_id == nil
+  return false if tile_id.nil?
   passage = passages[tile_id]
   return (passage && passage < 15)
 end

Data/Scripts/007_Objects and windows/001_RPG_Cache.rb

@@ -27,7 +27,7 @@ module RPG
     def self.fromCache(i)
       return nil if !@cache.include?(i)
       obj = @cache[i]
-      return nil if obj && obj.disposed?
+      return nil if obj&.disposed?
       return obj
     end
 

Data/Scripts/007_Objects and windows/002_MessageConfig.rb

@@ -177,7 +177,7 @@ end
 
 def pbBottomLeftLines(window, lines, width = nil)
   window.x = 0
-  window.width = width ? width : Graphics.width
+  window.width = width || Graphics.width
   window.height = (window.borderY rescue 32) + (lines * 32)
   window.y = Graphics.height - window.height
 end
@@ -393,10 +393,10 @@ end
 def pbDoEnsureBitmap(bitmap, dwidth, dheight)
   if !bitmap || bitmap.disposed? || bitmap.width < dwidth || bitmap.height < dheight
     oldfont = (bitmap && !bitmap.disposed?) ? bitmap.font : nil
-    bitmap.dispose if bitmap
+    bitmap&.dispose
     bitmap = Bitmap.new([1, dwidth].max, [1, dheight].max)
     (oldfont) ? bitmap.font = oldfont : pbSetSystemFont(bitmap)
-    bitmap.font.shadow = false if bitmap.font && bitmap.font.respond_to?("shadow")
+    bitmap.font.shadow = false if bitmap.font&.respond_to?("shadow")
   end
   return bitmap
 end
@@ -666,7 +666,7 @@ end
 def pbRestoreActivations(sprites, activeStatuses)
   return if !sprites || !activeStatuses
   activeStatuses.keys.each do |k|
-    if sprites[k] && sprites[k].is_a?(Window) && !pbDisposed?(sprites[k])
+    if sprites[k].is_a?(Window) && !pbDisposed?(sprites[k])
       sprites[k].active = activeStatuses[k] ? true : false
     end
   end
@@ -689,7 +689,7 @@ def pbActivateWindow(sprites, key)
   return if !sprites
   activeStatuses = {}
   sprites.each do |i|
-    if i[1] && i[1].is_a?(Window) && !pbDisposed?(i[1])
+    if i[1].is_a?(Window) && !pbDisposed?(i[1])
       activeStatuses[i[0]] = i[1].active
       i[1].active = (i[0] == key)
     end
@@ -717,7 +717,7 @@ end
 def addBackgroundPlane(sprites, planename, background, viewport = nil)
   sprites[planename] = AnimatedPlane.new(viewport)
   bitmapName = pbResolveBitmap("Graphics/Pictures/#{background}")
-  if bitmapName == nil
+  if bitmapName.nil?
     # Plane should exist in any case
     sprites[planename].bitmap = nil
     sprites[planename].visible = false
@@ -739,7 +739,7 @@ end
 # _viewport_ is a viewport to place the background in.
 def addBackgroundOrColoredPlane(sprites, planename, background, color, viewport = nil)
   bitmapName = pbResolveBitmap("Graphics/Pictures/#{background}")
-  if bitmapName == nil
+  if bitmapName.nil?
     # Plane should exist in any case
     sprites[planename] = ColoredPlane.new(color, viewport)
   else
@@ -773,7 +773,7 @@ if !defined?(_INTL)
   def _INTL(*args)
     string = args[0].clone
     (1...args.length).each do |i|
-      string.gsub!(/\{#{i}\}/, "#{args[i]}")
+      string.gsub!(/\{#{i}\}/, args[i].to_s)
     end
     return string
   end
@@ -795,7 +795,7 @@ if !defined?(_MAPINTL)
   def _MAPINTL(*args)
     string = args[1].clone
     (2...args.length).each do |i|
-      string.gsub!(/\{#{i}\}/, "#{args[i + 1]}")
+      string.gsub!(/\{#{i}\}/, args[i + 1].to_s)
     end
     return string
   end

Data/Scripts/007_Objects and windows/003_Window.rb

@@ -127,16 +127,16 @@ class Window
   def dispose
     if !self.disposed?
       @sprites.each do |i|
-        i[1].dispose if i[1]
+        i[1]&.dispose
         @sprites[i[0]] = nil
       end
       @sidebitmaps.each_with_index do |bitmap, i|
-        bitmap.dispose if bitmap
+        bitmap&.dispose
         @sidebitmaps[i] = nil
       end
       @blankcontents.dispose
-      @cursorbitmap.dispose if @cursorbitmap
-      @backbitmap.dispose if @backbitmap
+      @cursorbitmap&.dispose
+      @backbitmap&.dispose
       @sprites.clear
       @sidebitmaps.clear
       @_windowskin = nil
@@ -191,7 +191,7 @@ class Window
 
   def windowskin=(value)
     @_windowskin = value
-    if value && value.is_a?(Bitmap) && !value.disposed? && value.width == 128
+    if value.is_a?(Bitmap) && !value.disposed? && value.width == 128
       @rpgvx = true
     else
       @rpgvx = false
@@ -210,10 +210,10 @@ class Window
   end
 
   def cursor_rect=(value)
-    if !value
-      @cursor_rect.empty
-    else
+    if value
       @cursor_rect.set(value.x, value.y, value.width, value.height)
+    else
+      @cursor_rect.empty
     end
   end
 
@@ -322,7 +322,7 @@ class Window
 
   def ensureBitmap(bitmap, dwidth, dheight)
     if !bitmap || bitmap.disposed? || bitmap.width < dwidth || bitmap.height < dheight
-      bitmap.dispose if bitmap
+      bitmap&.dispose
       bitmap = Bitmap.new([1, dwidth].max, [1, dheight].max)
     end
     return bitmap
@@ -571,7 +571,12 @@ class Window
         @sprites["back"].src_rect.set(0, 0, 0, 0)
       end
     end
-    if @openness != 255
+    if @openness == 255
+      @spritekeys.each do |k|
+        sprite = @sprites[k]
+        sprite.zoom_y = 1.0
+      end
+    else
       opn = @openness / 255.0
       @spritekeys.each do |k|
         sprite = @sprites[k]
@@ -580,11 +585,6 @@ class Window
         sprite.oy = 0
         sprite.y = (@y + (@height / 2.0) + (@height * ratio * opn) - (@height / 2 * opn)).floor
       end
-    else
-      @spritekeys.each do |k|
-        sprite = @sprites[k]
-        sprite.zoom_y = 1.0
-      end
     end
     i = 0
     # Ensure Z order

Data/Scripts/007_Objects and windows/004_SpriteWindow.rb

@@ -113,16 +113,16 @@ class SpriteWindow < Window
   def dispose
     if !self.disposed?
       @sprites.each do |i|
-        i[1].dispose if i[1]
+        i[1]&.dispose
         @sprites[i[0]] = nil
       end
       @sidebitmaps.each_with_index do |bitmap, i|
-        bitmap.dispose if bitmap
+        bitmap&.dispose
         @sidebitmaps[i] = nil
       end
       @blankcontents.dispose
-      @cursorbitmap.dispose if @cursorbitmap
-      @backbitmap.dispose if @backbitmap
+      @cursorbitmap&.dispose
+      @backbitmap&.dispose
       @sprites.clear
       @sidebitmaps.clear
       @_windowskin = nil
@@ -143,7 +143,7 @@ class SpriteWindow < Window
   def viewport=(value)
     @viewport = value
     @spritekeys.each do |i|
-      @sprites[i].dispose if @sprites[i]
+      @sprites[i]&.dispose
       if @sprites[i].is_a?(Sprite)
         @sprites[i] = Sprite.new(@viewport)
       else
@@ -189,10 +189,10 @@ class SpriteWindow < Window
   end
 
   def cursor_rect=(value)
-    if !value
-      @cursor_rect.empty
-    else
+    if value
       @cursor_rect.set(value.x, value.y, value.width, value.height)
+    else
+      @cursor_rect.empty
     end
   end
 
@@ -358,7 +358,7 @@ class SpriteWindow < Window
         @trim = [16, 16, 16, 16]
       end
     else
-      if value && value.is_a?(Bitmap) && !value.disposed? && value.width == 128
+      if value.is_a?(Bitmap) && !value.disposed? && value.width == 128
         @rpgvx = true
       else
         @rpgvx = false
@@ -442,7 +442,7 @@ class SpriteWindow < Window
 
   def ensureBitmap(bitmap, dwidth, dheight)
     if !bitmap || bitmap.disposed? || bitmap.width < dwidth || bitmap.height < dheight
-      bitmap.dispose if bitmap
+      bitmap&.dispose
       bitmap = Bitmap.new([1, dwidth].max, [1, dheight].max)
     end
     return bitmap
@@ -631,16 +631,14 @@ class SpriteWindow < Window
     end
     @sprites["contents"].x = @x + trimStartX
     @sprites["contents"].y = @y + trimStartY
-    if (@compat & CompatBits::ShowScrollArrows) > 0 && @skinformat == 0
-      # Compatibility mode: Make scroll arrows visible
-      if @skinformat == 0 && @_windowskin && !@_windowskin.disposed? &&
+    if (@compat & CompatBits::ShowScrollArrows) > 0 && @skinformat == 0 &&
+       @_windowskin && !@_windowskin.disposed? &&
        @contents && !@contents.disposed?
       @sprites["scroll0"].visible = @visible && hascontents && @oy > 0
       @sprites["scroll1"].visible = @visible && hascontents && @ox > 0
       @sprites["scroll2"].visible = @visible && (@contents.width - @ox) > @width - trimWidth
       @sprites["scroll3"].visible = @visible && (@contents.height - @oy) > @height - trimHeight
     end
-    end
     if @_windowskin && !@_windowskin.disposed?
       borderX = startX + endX
       borderY = startY + endY
@@ -781,7 +779,13 @@ class SpriteWindow < Window
         @sprites["back"].src_rect.set(0, 0, 0, 0)
       end
     end
-    if @openness != 255
+    if @openness == 255
+      @spritekeys.each do |k|
+        sprite = @sprites[k]
+        sprite.zoom_x = 1.0
+        sprite.zoom_y = 1.0
+      end
+    else
       opn = @openness / 255.0
       @spritekeys.each do |k|
         sprite = @sprites[k]
@@ -791,12 +795,6 @@ class SpriteWindow < Window
         sprite.oy = 0
         sprite.y = (@y + (@height / 2.0) + (@height * ratio * opn) - (@height / 2 * opn)).floor
       end
-    else
-      @spritekeys.each do |k|
-        sprite = @sprites[k]
-        sprite.zoom_x = 1.0
-        sprite.zoom_y = 1.0
-      end
     end
     i = 0
     # Ensure Z order
@@ -861,7 +859,7 @@ class SpriteWindow_Base < SpriteWindow
   end
 
   def setSkin(skin)   # Filename of windowskin to apply. Supports XP, VX, and animated skins.
-    @customskin.dispose if @customskin
+    @customskin&.dispose
     @customskin = nil
     resolvedName = pbResolveBitmap(skin)
     return if nil_or_empty?(resolvedName)
@@ -875,7 +873,7 @@ class SpriteWindow_Base < SpriteWindow
   end
 
   def setSystemFrame
-    @customskin.dispose if @customskin
+    @customskin&.dispose
     @customskin = nil
     __setWindowskin(@sysframe.bitmap)
     __resolveSystemFrame
@@ -899,7 +897,7 @@ class SpriteWindow_Base < SpriteWindow
     if @curframe != MessageConfig.pbGetSystemFrame
       @curframe = MessageConfig.pbGetSystemFrame
       if @sysframe && !@customskin
-        @sysframe.dispose if @sysframe
+        @sysframe&.dispose
         @sysframe = AnimatedBitmap.new(@curframe)
         RPG::Cache.retain(@curframe) if @curframe && !@curframe.empty?
         @resolvedFrame = nil
@@ -924,9 +922,9 @@ class SpriteWindow_Base < SpriteWindow
   end
 
   def dispose
-    self.contents.dispose if self.contents
+    self.contents&.dispose
     @sysframe.dispose
-    @customskin.dispose if @customskin
+    @customskin&.dispose
     super
   end
 end

Data/Scripts/007_Objects and windows/005_SpriteWindow_text.rb

@@ -160,7 +160,7 @@ class Window_AdvancedTextPokemon < SpriteWindow_Base
 
   def dispose
     return if disposed?
-    @pausesprite.dispose if @pausesprite
+    @pausesprite&.dispose
     @pausesprite = nil
     super
   end
@@ -490,10 +490,8 @@ class Window_AdvancedTextPokemon < SpriteWindow_Base
       drawSingleFormattedChar(self.contents, @fmtchars[i])
       @lastDrawnChar = i
     end
-    if !self.letterbyletter
     # all characters were drawn, reset old font
-      self.contents.font = @oldfont if @oldfont
-    end
+    self.contents.font = @oldfont if !self.letterbyletter && @oldfont
     if numchars > 0 && numchars != @numtextchars
       fch = @fmtchars[numchars - 1]
       if fch
@@ -579,7 +577,7 @@ class Window_AdvancedTextPokemon < SpriteWindow_Base
 
   def update
     super
-    @pausesprite.update if @pausesprite && @pausesprite.visible
+    @pausesprite.update if @pausesprite&.visible
     if @waitcount > 0
       @waitcount -= 1
       return
@@ -601,7 +599,7 @@ class Window_AdvancedTextPokemon < SpriteWindow_Base
       break if @textchars[@curchar] == "\n" ||   # newline
                @textchars[@curchar] == "\1" ||   # pause
                @textchars[@curchar] == "\2" ||   # letter-by-letter break
-               @textchars[@curchar] == nil
+               @textchars[@curchar].nil?
     end
   end
 end

Data/Scripts/007_Objects and windows/006_SpriteWindow_pictures.rb

@@ -26,7 +26,7 @@ class IconWindow < SpriteWindow_Base
   end
 
   def clearBitmaps
-    @_iconbitmap.dispose if @_iconbitmap
+    @_iconbitmap&.dispose
     @_iconbitmap = nil
     self.contents = nil if !self.disposed?
   end
@@ -40,13 +40,13 @@ class IconWindow < SpriteWindow_Base
   def setBitmap(file, hue = 0)
     clearBitmaps
     @name = file
-    return if file == nil
-    if file != ""
+    return if file.nil?
+    if file == ""
+      @_iconbitmap = nil
+    else
       @_iconbitmap = AnimatedBitmap.new(file, hue)
       # for compatibility
       self.contents = @_iconbitmap ? @_iconbitmap.bitmap : nil
-    else
-      @_iconbitmap = nil
     end
   end
 end
@@ -84,7 +84,7 @@ class PictureWindow < SpriteWindow_Base
   end
 
   def clearBitmaps
-    @_iconbitmap.dispose if @_iconbitmap
+    @_iconbitmap&.dispose
     @_iconbitmap = nil
     self.contents = nil if !self.disposed?
   end

Data/Scripts/007_Objects and windows/007_SpriteWrapper.rb

@@ -280,19 +280,19 @@ class IconSprite < SpriteWrapper
     oldrc = self.src_rect
     clearBitmaps
     @name = file
-    return if file == nil
-    if file != ""
+    return if file.nil?
+    if file == ""
+      @_iconbitmap = nil
+    else
       @_iconbitmap = AnimatedBitmap.new(file, hue)
       # for compatibility
       self.bitmap = @_iconbitmap ? @_iconbitmap.bitmap : nil
       self.src_rect = oldrc
-    else
-      @_iconbitmap = nil
     end
   end
 
   def clearBitmaps
-    @_iconbitmap.dispose if @_iconbitmap
+    @_iconbitmap&.dispose
     @_iconbitmap = nil
     self.bitmap = nil if !self.disposed?
   end
@@ -336,7 +336,7 @@ class ChangelingSprite < SpriteWrapper
   end
 
   def addBitmap(key, path)
-    @bitmaps[key].dispose if @bitmaps[key]
+    @bitmaps[key]&.dispose
     @bitmaps[key] = AnimatedBitmap.new(path)
   end
 

Data/Scripts/007_Objects and windows/009_Planes.rb

@@ -17,7 +17,7 @@ class ColoredPlane < Plane
   end
 
   def dispose
-    self.bitmap.dispose if self.bitmap
+    self.bitmap&.dispose
     super
   end
 
@@ -59,7 +59,7 @@ class AnimatedPlane < Plane
   private
 
   def clear_bitmap
-    @bitmap.dispose if @bitmap
+    @bitmap&.dispose
     @bitmap = nil
     self.bitmap = nil if !self.disposed?
   end

Data/Scripts/007_Objects and windows/010_DrawText.rb

@@ -174,7 +174,7 @@ def getFormattedTextFast(bitmap, xDst, yDst, widthDst, heightDst, text, lineheig
   characters = []
   textchunks = []
   textchunks.push(text)
-  text = textchunks.join("")
+  text = textchunks.join
   textchars = text.scan(/./m)
   lastword = [0, 0] # position of last word
   hadspace = false
@@ -406,7 +406,7 @@ def getFormattedText(bitmap, xDst, yDst, widthDst, heightDst, text, lineheight =
   if controls.length == 0
     ret = getFormattedTextFast(bitmap, xDst, yDst, widthDst, heightDst, text, lineheight,
                                newlineBreaks, explicitBreaksOnly)
-    dummybitmap.dispose if dummybitmap
+    dummybitmap&.dispose
     return ret
   end
   x = y = 0
@@ -414,7 +414,7 @@ def getFormattedText(bitmap, xDst, yDst, widthDst, heightDst, text, lineheight =
   charactersInternal = []
 #  realtext = nil
 #  realtextStart = ""
-#  if !explicitBreaksOnly && textchunks.join("").length == 0
+#  if !explicitBreaksOnly && textchunks.join.length == 0
 #    # All commands occurred at the beginning of the text string
 #    realtext = (newlineBreaks) ? text : text.gsub(/\n/, " ")
 #    realtextStart = oldtext[0, oldtext.length - realtext.length]
@@ -432,7 +432,7 @@ def getFormattedText(bitmap, xDst, yDst, widthDst, heightDst, text, lineheight =
     textlen += textchunks[i].scan(/./m).length
     control[2] = textlen
   end
-  text = textchunks.join("")
+  text = textchunks.join
   textchars = text.scan(/./m)
   colorstack = []
   boldcount = 0
@@ -830,7 +830,7 @@ def getFormattedText(bitmap, xDst, yDst, widthDst, heightDst, text, lineheight =
   # Remove all characters with Y greater or equal to _yDst_+_heightDst_
   characters.delete_if { |ch| ch[2] >= yDst + heightDst } if heightDst >= 0
   bitmap.font = oldfont
-  dummybitmap.dispose if dummybitmap
+  dummybitmap&.dispose
   return characters
 end
 
@@ -854,7 +854,7 @@ def getLineBrokenText(bitmap, value, width, dims)
   return ret if !bitmap || bitmap.disposed? || width <= 0
   textmsg = value.clone
   ret.push(["", 0, 0, 0, bitmap.text_size("X").height, 0, 0, 0, 0])
-  while ((c = textmsg.slice!(/\n|(\S*([ \r\t\f]?))/)) != nil)
+  while (c = textmsg.slice!(/\n|(\S*([ \r\t\f]?))/)) != nil
     break if c == ""
     length = c.scan(/./m).length
     ccheck = c
@@ -1083,8 +1083,8 @@ def drawTextEx(bitmap, x, y, width, numlines, text, baseColor, shadowColor)
 end
 
 def drawFormattedTextEx(bitmap, x, y, width, text, baseColor = nil, shadowColor = nil, lineheight = 32)
-  base = !baseColor ? Color.new(12 * 8, 12 * 8, 12 * 8) : baseColor.clone
-  shadow = !shadowColor ? Color.new(26 * 8, 26 * 8, 25 * 8) : shadowColor.clone
+  base = baseColor ? baseColor.clone : Color.new(12 * 8, 12 * 8, 12 * 8)
+  shadow = shadowColor ? shadowColor.clone : Color.new(26 * 8, 26 * 8, 25 * 8)
   text = "<c2=" + colorToRgb16(base) + colorToRgb16(shadow) + ">" + text
   chars = getFormattedText(bitmap, x, y, width, -1, text, lineheight)
   drawFormattedChars(bitmap, chars)

Data/Scripts/007_Objects and windows/011_Messages.rb

@@ -7,15 +7,15 @@ end
 
 def pbMapInterpreterRunning?
   interp = pbMapInterpreter
-  return interp && interp.running?
+  return interp&.running?
 end
 
 def pbRefreshSceneMap
-  $scene.miniupdate if $scene && $scene.is_a?(Scene_Map)
+  $scene.miniupdate if $scene.is_a?(Scene_Map)
 end
 
 def pbUpdateSceneMap
-  $scene.miniupdate if $scene && $scene.is_a?(Scene_Map) && !pbIsFaded?
+  $scene.miniupdate if $scene.is_a?(Scene_Map) && !pbIsFaded?
 end
 
 #===============================================================================
@@ -26,7 +26,7 @@ def pbEventCommentInput(*args)
   list = args[0].list   # List of commands for event or event page
   elements = args[1]    # Number of elements
   trigger = args[2]     # Trigger
-  return nil if list == nil
+  return nil if list.nil?
   return nil unless list.is_a?(Array)
   list.each do |item|
     next unless item.code == 108 || item.code == 408
@@ -186,7 +186,7 @@ def pbChooseNumber(msgwindow, params)
     Input.update
     pbUpdateSceneMap
     cmdwindow.update
-    msgwindow.update if msgwindow
+    msgwindow&.update
     yield if block_given?
     if Input.trigger?(Input::USE)
       ret = cmdwindow.number
@@ -220,7 +220,7 @@ class FaceWindowVX < SpriteWindow_Base
     faceinfo = face.split(",")
     facefile = pbResolveBitmap("Graphics/Faces/" + faceinfo[0])
     facefile = pbResolveBitmap("Graphics/Pictures/" + faceinfo[0]) if !facefile
-    self.contents.dispose if self.contents
+    self.contents&.dispose
     @faceIndex = faceinfo[1].to_i
     @facebitmaptmp = AnimatedBitmap.new(facefile)
     @facebitmap = BitmapWrapper.new(96, 96)
@@ -240,7 +240,7 @@ class FaceWindowVX < SpriteWindow_Base
 
   def dispose
     @facebitmaptmp.dispose
-    @facebitmap.dispose if @facebitmap
+    @facebitmap&.dispose
     super
   end
 end
@@ -374,10 +374,10 @@ end
 #===============================================================================
 def pbCreateStatusWindow(viewport = nil)
   msgwindow = Window_AdvancedTextPokemon.new("")
-  if !viewport
-    msgwindow.z = 99999
-  else
+  if viewport
     msgwindow.viewport = viewport
+  else
+    msgwindow.z = 99999
   end
   msgwindow.visible = false
   msgwindow.letterbyletter = false
@@ -389,10 +389,10 @@ end
 
 def pbCreateMessageWindow(viewport = nil, skin = nil)
   msgwindow = Window_AdvancedTextPokemon.new("")
-  if !viewport
-    msgwindow.z = 99999
-  else
+  if viewport
     msgwindow.viewport = viewport
+  else
+    msgwindow.z = 99999
   end
   msgwindow.visible = true
   msgwindow.letterbyletter = true
@@ -447,10 +447,10 @@ def pbMessageDisplay(msgwindow, message, letterbyletter = true, commandProc = ni
   text.gsub!(/\\pm/i,  _INTL("${1}", $player.money.to_s_formatted)) if $player
   text.gsub!(/\\n/i,   "\n")
   text.gsub!(/\\\[([0-9a-f]{8,8})\]/i) { "<c2=" + $1 + ">" }
-  text.gsub!(/\\pg/i,  "\\b") if $player && $player.male?
-  text.gsub!(/\\pg/i,  "\\r") if $player && $player.female?
-  text.gsub!(/\\pog/i, "\\r") if $player && $player.male?
-  text.gsub!(/\\pog/i, "\\b") if $player && $player.female?
+  text.gsub!(/\\pg/i,  "\\b") if $player&.male?
+  text.gsub!(/\\pg/i,  "\\r") if $player&.female?
+  text.gsub!(/\\pog/i, "\\r") if $player&.male?
+  text.gsub!(/\\pog/i, "\\b") if $player&.female?
   text.gsub!(/\\pg/i,  "")
   text.gsub!(/\\pog/i, "")
   text.gsub!(/\\b/i,   "<c3=3050C8,D0D0C8>")
@@ -517,7 +517,7 @@ def pbMessageDisplay(msgwindow, message, letterbyletter = true, commandProc = ni
     textlen += toUnformattedText(textchunks[i]).scan(/./m).length
     controls[i][2] = textlen
   end
-  text = textchunks.join("")
+  text = textchunks.join
   signWaitCount = 0
   signWaitTime = Graphics.frame_rate / 2
   haveSpecialClose = false
@@ -534,10 +534,10 @@ def pbMessageDisplay(msgwindow, message, letterbyletter = true, commandProc = ni
       haveSpecialClose = true
       specialCloseSE = param
     when "f"
-      facewindow.dispose if facewindow
+      facewindow&.dispose
       facewindow = PictureWindow.new("Graphics/Pictures/#{param}")
     when "ff"
-      facewindow.dispose if facewindow
+      facewindow&.dispose
       facewindow = FaceWindowVX.new(param)
     when "ch"
       cmds = param.clone
@@ -588,25 +588,25 @@ def pbMessageDisplay(msgwindow, message, letterbyletter = true, commandProc = ni
       param = controls[i][1]
       case control
       when "f"
-        facewindow.dispose if facewindow
+        facewindow&.dispose
         facewindow = PictureWindow.new("Graphics/Pictures/#{param}")
         pbPositionNearMsgWindow(facewindow, msgwindow, :left)
         facewindow.viewport = msgwindow.viewport
         facewindow.z        = msgwindow.z
       when "ff"
-        facewindow.dispose if facewindow
+        facewindow&.dispose
         facewindow = FaceWindowVX.new(param)
         pbPositionNearMsgWindow(facewindow, msgwindow, :left)
         facewindow.viewport = msgwindow.viewport
         facewindow.z        = msgwindow.z
       when "g"      # Display gold window
-        goldwindow.dispose if goldwindow
+        goldwindow&.dispose
         goldwindow = pbDisplayGoldWindow(msgwindow)
       when "cn"     # Display coins window
-        coinwindow.dispose if coinwindow
+        coinwindow&.dispose
         coinwindow = pbDisplayCoinsWindow(msgwindow, goldwindow)
       when "pt"     # Display battle points window
-        battlepointswindow.dispose if battlepointswindow
+        battlepointswindow&.dispose
         battlepointswindow = pbDisplayBattlePointsWindow(msgwindow)
       when "wu"
         msgwindow.y = 0
@@ -650,7 +650,7 @@ def pbMessageDisplay(msgwindow, message, letterbyletter = true, commandProc = ni
     break if !letterbyletter
     Graphics.update
     Input.update
-    facewindow.update if facewindow
+    facewindow&.update
     if autoresume && msgwindow.waitcount == 0
       msgwindow.resume if msgwindow.busy?
       break if !msgwindow.busy?
@@ -677,11 +677,11 @@ def pbMessageDisplay(msgwindow, message, letterbyletter = true, commandProc = ni
   if commandProc
     ret = commandProc.call(msgwindow)
   end
-  msgback.dispose if msgback
-  goldwindow.dispose if goldwindow
-  coinwindow.dispose if coinwindow
-  battlepointswindow.dispose if battlepointswindow
-  facewindow.dispose if facewindow
+  msgback&.dispose
+  goldwindow&.dispose
+  coinwindow&.dispose
+  battlepointswindow&.dispose
+  facewindow&.dispose
   if haveSpecialClose
     pbSEPlay(pbStringToAudioFile(specialCloseSE))
     atTop = (msgwindow.y == 0)
@@ -752,7 +752,7 @@ def pbShowCommands(msgwindow, commands = nil, cmdIfCancel = 0, defaultCmd = 0)
     Graphics.update
     Input.update
     cmdwindow.update
-    msgwindow.update if msgwindow
+    msgwindow&.update
     yield if block_given?
     if Input.trigger?(Input::BACK)
       if cmdIfCancel > 0
@@ -832,7 +832,7 @@ def pbMessageWaitForInput(msgwindow, frames, showPause = false)
   frames.times do
     Graphics.update
     Input.update
-    msgwindow.update if msgwindow
+    msgwindow&.update
     pbUpdateSceneMap
     if Input.trigger?(Input::USE) || Input.trigger?(Input::BACK)
       break
@@ -863,7 +863,7 @@ def pbFreeText(msgwindow, currenttext, passwordbox, maxlength, width = 240)
       break
     end
     window.update
-    msgwindow.update if msgwindow
+    msgwindow&.update
     yield if block_given?
   end
   Input.text_input = false

Data/Scripts/007_Objects and windows/012_TextEntry.rb

@@ -23,7 +23,7 @@ class CharacterEntryHelper
   end
 
   def passwordChar=(value)
-    @passwordChar = value ? value : ""
+    @passwordChar = value || ""
   end
 
   def length
@@ -192,7 +192,7 @@ class Window_TextEntry < SpriteWindow_Base
     @helper.cursor = 0 if @helper.cursor < 0
     startpos = @helper.cursor
     fromcursor = 0
-    while (startpos > 0)
+    while startpos > 0
       c = (@helper.passwordChar != "") ? @helper.passwordChar : textscan[startpos - 1]
       fromcursor += bitmap.text_size(c).width
       break if fromcursor > width - 4
@@ -226,7 +226,7 @@ class Window_TextEntry_Keyboard < Window_TextEntry
   def update
     @frame += 1
     @frame %= 20
-    self.refresh if ((@frame % 10) == 0)
+    self.refresh if (@frame % 10) == 0
     return if !self.active
     # Moving cursor
     if Input.triggerex?(:LEFT) || Input.repeatex?(:LEFT)
@@ -460,7 +460,7 @@ class Window_MultilineTextEntry < SpriteWindow_Base
   def update
     @frame += 1
     @frame %= 20
-    self.refresh if ((@frame % 10) == 0)
+    self.refresh if (@frame % 10) == 0
     return if !self.active
     # Moving cursor
     if Input.triggerex?(:UP) || Input.repeatex?(:UP)
@@ -543,7 +543,7 @@ class Window_MultilineTextEntry < SpriteWindow_Base
           textheight = text[4]
           posToCursor = @cursorColumn - thiscolumn
           if posToCursor >= 0
-            partialString = text[0].scan(/./m)[0, posToCursor].join("")
+            partialString = text[0].scan(/./m)[0, posToCursor].join
             cursorX += bitmap.text_size(partialString).width
           end
           break

Data/Scripts/008_Audio/001_Audio.rb

@@ -138,7 +138,7 @@ def getPlayTime2(filename)
     loop do
       rstr = ""
       ateof = false
-      while !file.eof?
+      until file.eof?
         if (file.read(1)[0] rescue 0) == 0xFF
           begin
             rstr = file.read(3)
@@ -152,14 +152,14 @@ def getPlayTime2(filename)
       if rstr[0] == 0xFB
         t = rstr[1] >> 4
         next if [0, 15].include?(t)
-        freqs = [44100, 22050, 11025, 48000]
+        freqs = [44_100, 22_050, 11_025, 48_000]
         bitrates = [32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320]
         bitrate = bitrates[t]
         t = (rstr[1] >> 2) & 3
         freq = freqs[t]
         t = (rstr[1] >> 1) & 1
         filesize = FileTest.size(filename)
-        frameLength = ((144000 * bitrate) / freq) + t
+        frameLength = ((144_000 * bitrate) / freq) + t
         numFrames = filesize / (frameLength + 4)
         time = (numFrames * 1152.0 / freq)
         break

Data/Scripts/008_Audio/002_Audio_Play.rb

@@ -58,7 +58,7 @@ def pbBGMPlay(param, volume = nil, pitch = nil)
       return
     elsif (RPG.const_defined?(:BGM) rescue false)
       b = RPG::BGM.new(param.name, param.volume, param.pitch)
-      if b && b.respond_to?("play")
+      if b&.respond_to?("play")
         b.play
         return
       end
@@ -108,7 +108,7 @@ def pbMEPlay(param, volume = nil, pitch = nil)
       return
     elsif (RPG.const_defined?(:ME) rescue false)
       b = RPG::ME.new(param.name, param.volume, param.pitch)
-      if b && b.respond_to?("play")
+      if b&.respond_to?("play")
         b.play
         return
       end
@@ -125,7 +125,7 @@ def pbMEStop(timeInSeconds = 0.0)
   if $game_system && timeInSeconds > 0.0 && $game_system.respond_to?("me_fade")
     $game_system.me_fade(timeInSeconds)
     return
-  elsif $game_system && $game_system.respond_to?("me_stop")
+  elsif $game_system&.respond_to?("me_stop")
     $game_system.me_stop(nil)
     return
   elsif (RPG.const_defined?(:ME) rescue false)
@@ -158,7 +158,7 @@ def pbBGSPlay(param, volume = nil, pitch = nil)
       return
     elsif (RPG.const_defined?(:BGS) rescue false)
       b = RPG::BGS.new(param.name, param.volume, param.pitch)
-      if b && b.respond_to?("play")
+      if b&.respond_to?("play")
         b.play
         return
       end
@@ -209,7 +209,7 @@ def pbSEPlay(param, volume = nil, pitch = nil)
     end
     if (RPG.const_defined?(:SE) rescue false)
       b = RPG::SE.new(param.name, param.volume, param.pitch)
-      if b && b.respond_to?("play")
+      if b&.respond_to?("play")
         b.play
         return
       end

Data/Scripts/009_Scenes/001_Transitions.rb

@@ -38,7 +38,7 @@ module Graphics
   def self.update
     update_KGC_SpecialTransition
     @@transition.update if @@transition && !@@transition.disposed?
-    @@transition = nil if @@transition && @@transition.disposed?
+    @@transition = nil if @@transition&.disposed?
   end
 
   def self.judge_special_transition(duration, filename)
@@ -137,11 +137,11 @@ module Transitions
     def dispose
       return if disposed?
       dispose_all
-      @sprites.each { |s| s.dispose if s }
+      @sprites.each { |s| s&.dispose }
       @sprites.clear
       @overworld_sprite.dispose
-      @overworld_bitmap.dispose if @overworld_bitmap
-      @viewport.dispose if @viewport
+      @overworld_bitmap&.dispose
+      @viewport&.dispose
       @disposed = true
     end
 
@@ -404,8 +404,8 @@ module Transitions
     end
 
     def dispose_all
-      @buffer_original.dispose if @buffer_original
-      @buffer_temp.dispose if @buffer_temp
+      @buffer_original&.dispose
+      @buffer_temp&.dispose
     end
 
     def update_anim
@@ -628,13 +628,13 @@ module Transitions
 
     def dispose_all
       # Dispose sprites
-      @bubbles_sprite.dispose if @bubbles_sprite
-      @splash_sprite.dispose if @splash_sprite
-      @black_sprite.dispose if @black_sprite
+      @bubbles_sprite&.dispose
+      @splash_sprite&.dispose
+      @black_sprite&.dispose
       # Dispose bitmaps
-      @bubble_bitmap.dispose if @bubble_bitmap
-      @splash_bitmap.dispose if @splash_bitmap
-      @black_bitmap.dispose if @black_bitmap
+      @bubble_bitmap&.dispose
+      @splash_bitmap&.dispose
+      @black_bitmap&.dispose
     end
 
     def update_anim
@@ -704,12 +704,12 @@ module Transitions
     def dispose_all
       # Dispose sprites
       if @ball_sprites
-        @ball_sprites.each { |s| s.dispose if s }
+        @ball_sprites.each { |s| s&.dispose }
         @ball_sprites.clear
       end
       # Dispose bitmaps
-      @black_bitmap.dispose if @black_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim
@@ -782,20 +782,20 @@ module Transitions
     def dispose_all
       # Dispose sprites
       if @overworld_sprites
-        @overworld_sprites.each { |s| s.dispose if s }
+        @overworld_sprites.each { |s| s&.dispose }
         @overworld_sprites.clear
       end
       if @black_sprites
-        @black_sprites.each { |s| s.dispose if s }
+        @black_sprites.each { |s| s&.dispose }
         @black_sprites.clear
       end
       if @ball_sprites
-        @ball_sprites.each { |s| s.dispose if s }
+        @ball_sprites.each { |s| s&.dispose }
         @ball_sprites.clear
       end
       # Dispose bitmaps
-      @black_bitmap.dispose if @black_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim
@@ -892,12 +892,12 @@ module Transitions
     def dispose_all
       # Dispose sprites
       if @ball_sprites
-        @ball_sprites.each { |s| s.dispose if s }
+        @ball_sprites.each { |s| s&.dispose }
         @ball_sprites.clear
       end
       # Dispose bitmaps
-      @black_bitmap.dispose if @black_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim
@@ -966,11 +966,11 @@ module Transitions
 
     def dispose_all
       # Dispose sprites
-      @ball_sprite.dispose if @ball_sprite
+      @ball_sprite&.dispose
       # Dispose bitmaps
-      @black_bitmap.dispose if @black_bitmap
-      @curve_bitmap.dispose if @curve_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_bitmap&.dispose
+      @curve_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim
@@ -1046,16 +1046,16 @@ module Transitions
     def dispose_all
       # Dispose sprites
       if @ball_sprites
-        @ball_sprites.each { |s| s.dispose if s }
+        @ball_sprites.each { |s| s&.dispose }
         @ball_sprites.clear
       end
       if @black_trail_sprites
-        @black_trail_sprites.each { |s| s.dispose if s }
+        @black_trail_sprites.each { |s| s&.dispose }
         @black_trail_sprites.clear
       end
       # Dispose bitmaps
-      @black_bitmap.dispose if @black_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim
@@ -1122,11 +1122,11 @@ module Transitions
 
     def dispose_all
       # Dispose sprites
-      @ball_sprite.dispose if @ball_sprite
-      @black_sprite.dispose if @black_sprite
+      @ball_sprite&.dispose
+      @black_sprite&.dispose
       # Dispose bitmaps
-      @black_bitmap.dispose if @black_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim
@@ -1194,14 +1194,14 @@ module Transitions
 
     def dispose_all
       # Dispose sprites
-      @ball_sprites.each { |s| s.dispose if s }
+      @ball_sprites.each { |s| s&.dispose }
       @ball_sprites.clear
       # Dispose bitmaps
-      @black_1_bitmap.dispose if @black_1_bitmap
-      @black_2_bitmap.dispose if @black_2_bitmap
-      @black_3_bitmap.dispose if @black_3_bitmap
-      @black_4_bitmap.dispose if @black_4_bitmap
-      @ball_bitmap.dispose if @ball_bitmap
+      @black_1_bitmap&.dispose
+      @black_2_bitmap&.dispose
+      @black_3_bitmap&.dispose
+      @black_4_bitmap&.dispose
+      @ball_bitmap&.dispose
     end
 
     def update_anim

Data/Scripts/009_Scenes/002_EventScene.rb

@@ -10,7 +10,7 @@ class PictureSprite < SpriteWrapper
   end
 
   def dispose
-    @pictureBitmap.dispose if @pictureBitmap
+    @pictureBitmap&.dispose
     super
   end
 
@@ -22,7 +22,7 @@ class PictureSprite < SpriteWrapper
 
   def update
     super
-    @pictureBitmap.update if @pictureBitmap
+    @pictureBitmap&.update
     # If picture file name is different from current one
     if @customBitmap && @picture.name == ""
       self.bitmap = (@customBitmapIsBitmap) ? @customBitmap : @customBitmap.bitmap
@@ -32,13 +32,13 @@ class PictureSprite < SpriteWrapper
       @hue = @picture.hue.to_i
       # If file name is not empty
       if @picture_name == ""
-        @pictureBitmap.dispose if @pictureBitmap
+        @pictureBitmap&.dispose
         @pictureBitmap = nil
         self.visible = false
         return
       end
       # Get picture graphic
-      @pictureBitmap.dispose if @pictureBitmap
+      @pictureBitmap&.dispose
       @pictureBitmap = AnimatedBitmap.new(@picture_name, @hue)
       self.bitmap = (@pictureBitmap) ? @pictureBitmap.bitmap : nil
     elsif @picture_name == ""
@@ -175,7 +175,7 @@ class EventScene
   end
 
   def main
-    while !disposed?
+    until disposed?
       update
     end
   end

Data/Scripts/010_Data/001_Hardcoded data/007_Evolution.rb

@@ -53,7 +53,7 @@ module GameData
     end
 
     def call_after_evolution(*args)
-      @after_evolution_proc.call(*args) if @after_evolution_proc
+      @after_evolution_proc&.call(*args)
     end
   end
 end
@@ -500,8 +500,7 @@ GameData::Evolution.register({
   :minimum_level => 1,   # Needs any level up
   :level_up_proc => proc { |pkmn, parameter|
     map_metadata = $game_map.metadata
-    next map_metadata && map_metadata.town_map_position &&
-         map_metadata.town_map_position[0] == parameter
+    next map_metadata&.town_map_position && map_metadata.town_map_position[0] == parameter
   }
 })
 

Data/Scripts/010_Data/002_PBS data/001_MiscPBSData.rb

@@ -42,11 +42,9 @@ end
 #===============================================================================
 def pbLoadPhoneData
   $game_temp = Game_Temp.new if !$game_temp
-  if !$game_temp.phone_messages_data
-    if pbRgssExists?("Data/phone.dat")
+  if !$game_temp.phone_messages_data && pbRgssExists?("Data/phone.dat")
     $game_temp.phone_messages_data = load_data("Data/phone.dat")
   end
-  end
   return $game_temp.phone_messages_data
 end
 
@@ -66,11 +64,9 @@ end
 #===============================================================================
 def pbLoadBattleAnimations
   $game_temp = Game_Temp.new if !$game_temp
-  if !$game_temp.battle_animations_data
-    if pbRgssExists?("Data/PkmnAnimations.rxdata")
+  if !$game_temp.battle_animations_data && pbRgssExists?("Data/PkmnAnimations.rxdata")
     $game_temp.battle_animations_data = load_data("Data/PkmnAnimations.rxdata")
   end
-  end
   return $game_temp.battle_animations_data
 end
 

Data/Scripts/010_Data/002_PBS data/006_Item.rb

@@ -188,7 +188,7 @@ module GameData
         :KYOGRE   => [:BLUEORB],
         :GROUDON  => [:REDORB]
       }
-      return combos[species] && combos[species].include?(@id)
+      return combos[species]&.include?(@id)
     end
   end
 end

Data/Scripts/010_Data/002_PBS data/013_Encounter.rb

@@ -51,8 +51,8 @@ module GameData
     def self.each_of_version(version = 0)
       self.each do |data|
         yield data if data.version == version
-        if version > 0
-          yield data if data.version == 0 && !self::DATA.has_key?([data.map, version])
+        if version > 0 && data.version == 0 && !self::DATA.has_key?([data.map, version])
+          yield data
         end
       end
     end

Data/Scripts/010_Data/002_PBS data/014_TrainerType.rb

@@ -48,7 +48,7 @@ module GameData
 
     def self.charset_filename_brief(tr_type)
       ret = self.charset_filename(tr_type)
-      ret.slice!("Graphics/Characters/") if ret
+      ret&.slice!("Graphics/Characters/")
       return ret
     end
 

Data/Scripts/011_Battle/001_Battle/001_Battle.rb

@@ -321,7 +321,7 @@ class Battle
   def pbAbleCount(idxBattler = 0)
     party = pbParty(idxBattler)
     count = 0
-    party.each { |pkmn| count += 1 if pkmn && pkmn.able? }
+    party.each { |pkmn| count += 1 if pkmn&.able? }
     return count
   end
 

Data/Scripts/011_Battle/001_Battle/002_Battle_StartAndEnd.rb

@@ -465,11 +465,11 @@ class Battle
       end
       infected.each do |idxParty|
         strain = $player.party[idxParty].pokerusStrain
-        if idxParty > 0 && $player.party[idxParty - 1].pokerusStage == 0
-          $player.party[idxParty - 1].givePokerus(strain) if rand(3) == 0   # 33%
+        if idxParty > 0 && $player.party[idxParty - 1].pokerusStage == 0 && rand(3) == 0   # 33%
+          $player.party[idxParty - 1].givePokerus(strain)
         end
-        if idxParty < $player.party.length - 1 && $player.party[idxParty + 1].pokerusStage == 0
-          $player.party[idxParty + 1].givePokerus(strain) if rand(3) == 0   # 33%
+        if idxParty < $player.party.length - 1 && $player.party[idxParty + 1].pokerusStage == 0 && rand(3) == 0   # 33%
+          $player.party[idxParty + 1].givePokerus(strain)
         end
       end
     end

Data/Scripts/011_Battle/001_Battle/003_Battle_ExpAndMoveLearning.rb

@@ -11,13 +11,13 @@ class Battle
     expAll = $player.has_exp_all || $bag.has?(:EXPALL)
     p1 = pbParty(0)
     @battlers.each do |b|
-      next unless b && b.opposes?   # Can only gain Exp from fainted foes
+      next unless b&.opposes?   # Can only gain Exp from fainted foes
       next if b.participants.length == 0
       next unless b.fainted? || b.captured
       # Count the number of participants
       numPartic = 0
       b.participants.each do |partic|
-        next unless p1[partic] && p1[partic].able? && pbIsOwner?(0, partic)
+        next unless p1[partic]&.able? && pbIsOwner?(0, partic)
         numPartic += 1
       end
       # Find which Pokémon have an Exp Share
@@ -199,7 +199,7 @@ class Battle
       if curLevel > newLevel
         # Gained all the Exp now, end the animation
         pkmn.calc_stats
-        battler.pbUpdate(false) if battler
+        battler&.pbUpdate(false)
         @scene.pbRefreshOne(battler.index) if battler
         break
       end
@@ -211,11 +211,11 @@ class Battle
       oldSpAtk   = pkmn.spatk
       oldSpDef   = pkmn.spdef
       oldSpeed   = pkmn.speed
-      if battler && battler.pokemon
+      if battler&.pokemon
         battler.pokemon.changeHappiness("levelup")
       end
       pkmn.calc_stats
-      battler.pbUpdate(false) if battler
+      battler&.pbUpdate(false)
       @scene.pbRefreshOne(battler.index) if battler
       pbDisplayPaused(_INTL("{1} grew to Lv. {2}!", pkmn.name, curLevel))
       @scene.pbLevelUp(pkmn, battler, oldTotalHP, oldAttack, oldDefense,
@@ -260,7 +260,7 @@ class Battle
           pbDisplayPaused(_INTL("1, 2, and... ... ... Ta-da!")) { pbSEPlay("Battle ball drop") }
           pbDisplayPaused(_INTL("{1} forgot how to use {2}. And...", pkmnName, oldMoveName))
           pbDisplay(_INTL("{1} learned {2}!", pkmnName, moveName)) { pbSEPlay("Pkmn move learnt") }
-          battler.pbCheckFormOnMovesetChange if battler
+          battler&.pbCheckFormOnMovesetChange
           break
         elsif pbDisplayConfirm(_INTL("Give up on learning {1}?", moveName))
           pbDisplay(_INTL("{1} did not learn {2}.", pkmnName, moveName))

Data/Scripts/011_Battle/001_Battle/005_Battle_ActionSwitching.rb

@@ -12,7 +12,7 @@ class Battle
     return false if idxParty >= party.length
     return false if !party[idxParty]
     if party[idxParty].egg?
-      partyScene.pbDisplay(_INTL("An Egg can't battle!")) if partyScene
+      partyScene&.pbDisplay(_INTL("An Egg can't battle!"))
       return false
     end
     if !pbIsOwner?(idxBattler, idxParty)
@@ -24,11 +24,11 @@ class Battle
       return false
     end
     if party[idxParty].fainted?
-      partyScene.pbDisplay(_INTL("{1} has no energy left to battle!", party[idxParty].name)) if partyScene
+      partyScene&.pbDisplay(_INTL("{1} has no energy left to battle!", party[idxParty].name))
       return false
     end
     if pbFindBattler(idxParty, idxBattler)
-      partyScene.pbDisplay(_INTL("{1} is already in battle!", party[idxParty].name)) if partyScene
+      partyScene&.pbDisplay(_INTL("{1} is already in battle!", party[idxParty].name))
       return false
     end
     return true
@@ -45,45 +45,43 @@ class Battle
     # Pokémon
     allSameSideBattlers(idxBattler).each do |b|
       next if choices[b.index][0] != :SwitchOut || choices[b.index][1] != idxParty
-      partyScene.pbDisplay(_INTL("{1} has already been selected.",
-                                 pbParty(idxBattler)[idxParty].name)) if partyScene
+      partyScene&.pbDisplay(_INTL("{1} has already been selected.",
+                                  pbParty(idxBattler)[idxParty].name))
       return false
     end
     # Check whether battler can switch out
     battler = @battlers[idxBattler]
     return true if battler.fainted?
     # Ability/item effects that allow switching no matter what
-    if battler.abilityActive?
-      if Battle::AbilityEffects.triggerCertainSwitching(battler.ability, battler, self)
+    if battler.abilityActive? &&
+       Battle::AbilityEffects.triggerCertainSwitching(battler.ability, battler, self)
       return true
     end
-    end
-    if battler.itemActive?
-      if Battle::ItemEffects.triggerCertainSwitching(battler.item, battler, self)
+    if battler.itemActive? &&
+       Battle::ItemEffects.triggerCertainSwitching(battler.item, battler, self)
       return true
     end
-    end
     # Other certain switching effects
     return true if Settings::MORE_TYPE_EFFECTS && battler.pbHasType?(:GHOST)
     # Other certain trapping effects
     if battler.trappedInBattle?
-      partyScene.pbDisplay(_INTL("{1} can't be switched out!", battler.pbThis)) if partyScene
+      partyScene&.pbDisplay(_INTL("{1} can't be switched out!", battler.pbThis))
       return false
     end
     # Trapping abilities/items
     allOtherSideBattlers(idxBattler).each do |b|
       next if !b.abilityActive?
       if Battle::AbilityEffects.triggerTrappingByTarget(b.ability, battler, b, self)
-        partyScene.pbDisplay(_INTL("{1}'s {2} prevents switching!",
-                                   b.pbThis, b.abilityName)) if partyScene
+        partyScene&.pbDisplay(_INTL("{1}'s {2} prevents switching!",
+                                    b.pbThis, b.abilityName))
         return false
       end
     end
     allOtherSideBattlers(idxBattler).each do |b|
       next if !b.itemActive?
       if Battle::ItemEffects.triggerTrappingByTarget(b.item, battler, b, self)
-        partyScene.pbDisplay(_INTL("{1}'s {2} prevents switching!",
-                                   b.pbThis, b.itemName)) if partyScene
+        partyScene&.pbDisplay(_INTL("{1}'s {2} prevents switching!",
+                                    b.pbThis, b.itemName))
         return false
       end
     end
@@ -119,8 +117,8 @@ class Battle
       elsif !pbCanSwitch?(idxBattler, idxParty, partyScene)
         next false
       end
-      if shouldRegister
-        next false if idxParty < 0 || !pbRegisterSwitch(idxBattler, idxParty)
+      if shouldRegister && (idxParty < 0 || !pbRegisterSwitch(idxBattler, idxParty))
+        next false
       end
       ret = idxParty
       next true
@@ -187,10 +185,10 @@ class Battle
           switched.push(idxBattler)
         else   # Player's Pokémon has fainted in a wild battle
           switch = false
-          if !pbDisplayConfirm(_INTL("Use next Pokémon?"))
-            switch = (pbRun(idxBattler, true) <= 0)
-          else
+          if pbDisplayConfirm(_INTL("Use next Pokémon?"))
             switch = true
+          else
+            switch = (pbRun(idxBattler, true) <= 0)
           end
           if switch
             idxPlayerPartyNew = pbGetReplacementPokemonIndex(idxBattler)   # Owner chooses

Data/Scripts/011_Battle/001_Battle/006_Battle_ActionUseItem.rb

@@ -56,14 +56,14 @@ class Battle
     return if !item
     return if !GameData::Item.get(item).consumed_after_use?
     if pbOwnedByPlayer?(idxBattler)
-      if $bag && $bag.can_add?(item)
+      if $bag&.can_add?(item)
         $bag.add(item)
       else
         raise _INTL("Couldn't return unused item to Bag somehow.")
       end
     else
       items = pbGetOwnerItems(idxBattler)
-      items.push(item) if items
+      items&.push(item)
     end
   end
 

Data/Scripts/011_Battle/001_Battle/007_Battle_ActionRunning.rb

@@ -75,8 +75,8 @@ class Battle
         return 1
       end
       # Abilities that guarantee escape
-      if battler.abilityActive?
-        if Battle::AbilityEffects.triggerCertainEscapeFromBattle(battler.ability, battler)
+      if battler.abilityActive? &&
+         Battle::AbilityEffects.triggerCertainEscapeFromBattle(battler.ability, battler)
         pbShowAbilitySplash(battler, true)
         pbHideAbilitySplash(battler)
         pbSEPlay("Battle flee")
@@ -84,16 +84,14 @@ class Battle
         @decision = 3
         return 1
       end
-      end
       # Held items that guarantee escape
-      if battler.itemActive?
-        if Battle::ItemEffects.triggerCertainEscapeFromBattle(battler.item, battler)
+      if battler.itemActive? &&
+         Battle::ItemEffects.triggerCertainEscapeFromBattle(battler.item, battler)
         pbSEPlay("Battle flee")
         pbDisplayPaused(_INTL("{1} fled using its {2}!", battler.pbThis, battler.itemName))
         @decision = 3
         return 1
       end
-      end
       # Other certain trapping effects
       if battler.trappedInBattle?
         pbDisplayPaused(_INTL("You can't escape!"))

Data/Scripts/011_Battle/001_Battle/010_Battle_AttackPhase.rb

@@ -161,10 +161,10 @@ class Battle
       next if advance
       # Check for all done
       priority.each do |b|
-        if !b.fainted? && !b.movedThisRound?
-          advance = true if @choices[b.index][0] == :UseMove || @choices[b.index][0] == :Shift
-        end
-        break if advance
+        next if b.fainted?
+        next if b.movedThisRound? || ![:UseMove, :Shift].include?(@choices[b.index][0])
+        advance = true
+        break
       end
       next if advance
       # All Pokémon have moved; end the loop

Data/Scripts/011_Battle/001_Battle/011_Battle_EndOfRoundPhase.rb

@@ -223,7 +223,7 @@ class Battle
       if !moveUser   # User isn't in battle, get it from the party
         party = pbParty(pos.effects[PBEffects::FutureSightUserIndex])
         pkmn = party[pos.effects[PBEffects::FutureSightUserPartyIndex]]
-        if pkmn && pkmn.able?
+        if pkmn&.able?
           moveUser = Battler.new(self, pos.effects[PBEffects::FutureSightUserIndex])
           moveUser.pbInitDummyPokemon(pkmn, pos.effects[PBEffects::FutureSightUserPartyIndex])
         end
@@ -504,13 +504,12 @@ class Battle
       b.pbItemHPHealCheck
       b.pbFaint if b.fainted?
     end
-    if perishSongUsers.length > 0
-      # If all remaining Pokemon fainted by a Perish Song triggered by a single side
-      if (perishSongUsers.find_all { |idxBattler| opposes?(idxBattler) }.length == perishSongUsers.length) ||
-         (perishSongUsers.find_all { |idxBattler| !opposes?(idxBattler) }.length == perishSongUsers.length)
+    # Judge if all remaining Pokemon fainted by a Perish Song triggered by a single side
+    if perishSongUsers.length > 0 &&
+       ((perishSongUsers.find_all { |idxBattler| opposes?(idxBattler) }.length == perishSongUsers.length) ||
+       (perishSongUsers.find_all { |idxBattler| !opposes?(idxBattler) }.length == perishSongUsers.length))
       pbJudgeCheckpoint(@battlers[perishSongUsers[0]])
     end
-    end
     # Check for end of battle
     if @decision > 0
       pbGainExp

Data/Scripts/011_Battle/002_Battler/001_Battle_Battler.rb

@@ -136,17 +136,17 @@ class Battle::Battler
   #=============================================================================
   def hasMega?
     return false if @effects[PBEffects::Transform]
-    return @pokemon && @pokemon.hasMegaForm?
+    return @pokemon&.hasMegaForm?
   end
 
-  def mega?; return @pokemon && @pokemon.mega?; end
+  def mega?; return @pokemon&.mega?; end
 
   def hasPrimal?
     return false if @effects[PBEffects::Transform]
-    return @pokemon && @pokemon.hasPrimalForm?
+    return @pokemon&.hasPrimalForm?
   end
 
-  def primal?; return @pokemon && @pokemon.primal?; end
+  def primal?; return @pokemon&.primal?; end
 
   def shadowPokemon?; return false; end
 
@@ -184,11 +184,11 @@ class Battle::Battler
 
   def shiny?
     return @effects[PBEffects::Illusion].shiny? if @effects[PBEffects::Illusion]
-    return @pokemon && @pokemon.shiny?
+    return @pokemon&.shiny?
   end
 
   def super_shiny?
-    return @pokemon && @pokemon.super_shiny?
+    return @pokemon&.super_shiny?
   end
 
   def owned?
@@ -295,7 +295,7 @@ class Battle::Battler
   end
 
   def isSpecies?(species)
-    return @pokemon && @pokemon.isSpecies?(species)
+    return @pokemon&.isSpecies?(species)
   end
 
   # Returns the active types of this Pokémon. The array should not include the
@@ -311,8 +311,8 @@ class Battle::Battler
       ret.push(:NORMAL) if ret.length == 0
     end
     # Add the third type specially.
-    if withType3 && @effects[PBEffects::Type3]
-      ret.push(@effects[PBEffects::Type3]) if !ret.include?(@effects[PBEffects::Type3])
+    if withType3 && @effects[PBEffects::Type3] && !ret.include?(@effects[PBEffects::Type3])
+      ret.push(@effects[PBEffects::Type3])
     end
     return ret
   end

Data/Scripts/011_Battle/002_Battler/003_Battler_ChangeSelf.rb

@@ -277,15 +277,14 @@ class Battle::Battler
       end
     end
     # Zygarde - Power Construct
-    if isSpecies?(:ZYGARDE) && self.ability == :POWERCONSTRUCT && endOfRound
-      if @hp <= @totalhp / 2 && @form < 2   # Turn into Complete Forme
+    if isSpecies?(:ZYGARDE) && self.ability == :POWERCONSTRUCT && endOfRound &&
+       @hp <= @totalhp / 2 && @form < 2   # Turn into Complete Forme
       newForm = @form + 2
       @battle.pbDisplay(_INTL("You sense the presence of many!"))
       @battle.pbShowAbilitySplash(self, true)
       @battle.pbHideAbilitySplash(self)
       pbChangeForm(newForm, _INTL("{1} transformed into its Complete Forme!", pbThis))
     end
-    end
     # Morpeko - Hunger Switch
     if isSpecies?(:MORPEKO) && hasActiveAbility?(:HUNGERSWITCH) && endOfRound
       # Intentionally doesn't show the ability splash or a message

Data/Scripts/011_Battle/002_Battler/004_Battler_Statuses.rb

@@ -281,11 +281,11 @@ class Battle::Battler
 
   def pbCanSleepYawn?
     return false if self.status != :NONE
-    if affectedByTerrain?
-      return false if [:Electric, :Misty].include?(@battle.field.terrain)
+    if affectedByTerrain? && [:Electric, :Misty].include?(@battle.field.terrain)
+      return false
     end
-    if !hasActiveAbility?(:SOUNDPROOF)
-      return false if @battle.allBattlers.any? { |b| b.effects[PBEffects::Uproar] > 0 }
+    if !hasActiveAbility?(:SOUNDPROOF) && @battle.allBattlers.any? { |b| b.effects[PBEffects::Uproar] > 0 }
+      return false
     end
     if Battle::AbilityEffects.triggerStatusImmunityNonIgnorable(self.ability, self, :SLEEP)
       return false
@@ -454,8 +454,7 @@ class Battle::Battler
       @battle.pbDisplay(_INTL("{1} surrounds itself with misty terrain!", pbThis(true))) if showMessages
       return false
     end
-    if selfInflicted || !@battle.moldBreaker
-      if hasActiveAbility?(:OWNTEMPO)
+    if (selfInflicted || !@battle.moldBreaker) && hasActiveAbility?(:OWNTEMPO)
       if showMessages
         @battle.pbShowAbilitySplash(self)
         if Battle::Scene::USE_ABILITY_SPLASH
@@ -467,7 +466,6 @@ class Battle::Battler
       end
       return false
     end
-    end
     if pbOwnSide.effects[PBEffects::Safeguard] > 0 && !selfInflicted &&
        !(user && user.hasActiveAbility?(:INFILTRATOR))
       @battle.pbDisplay(_INTL("{1}'s team is protected by Safeguard!", pbThis)) if showMessages

Data/Scripts/011_Battle/002_Battler/005_Battler_StatStages.rb

@@ -118,7 +118,8 @@ class Battle::Battler
     return @stages[stat] <= -6
   end
 
-  def pbCanLowerStatStage?(stat, user = nil, move = nil, showFailMsg = false, ignoreContrary = false, ignoreMirrorArmor = false)
+  def pbCanLowerStatStage?(stat, user = nil, move = nil, showFailMsg = false,
+                           ignoreContrary = false, ignoreMirrorArmor = false)
     return false if fainted?
     if !@battle.moldBreaker
       # Contrary
@@ -126,12 +127,14 @@ class Battle::Battler
         return pbCanRaiseStatStage?(stat, user, move, showFailMsg, true)
       end
       # Mirror Armor
-      if hasActiveAbility?(:MIRRORARMOR) && !ignoreMirrorArmor && user && user.index != @index
-        return true if !statStageAtMin?(stat)
+      if hasActiveAbility?(:MIRRORARMOR) && !ignoreMirrorArmor &&
+         user && user.index != @index && !statStageAtMin?(stat)
+        return true
       end
     end
     if !user || user.index != @index   # Not self-inflicted
-      if @effects[PBEffects::Substitute] > 0 && (ignoreMirrorArmor || !(move && move.ignoresSubstitute?(user)))
+      if @effects[PBEffects::Substitute] > 0 &&
+         (ignoreMirrorArmor || !(move && move.ignoresSubstitute?(user)))
         @battle.pbDisplay(_INTL("{1} is protected by its substitute!", pbThis)) if showFailMsg
         return false
       end
@@ -328,14 +331,13 @@ class Battle::Battler
                                 pbThis, user.pbThis(true), user.abilityName))
         return false
       end
-      if abilityActive?
-        if Battle::AbilityEffects.triggerStatLossImmunity(self.ability, self, :ATTACK, @battle, false) ||
-           Battle::AbilityEffects.triggerStatLossImmunityNonIgnorable(self.ability, self, :ATTACK, @battle, false)
+      if abilityActive? &&
+         (Battle::AbilityEffects.triggerStatLossImmunity(self.ability, self, :ATTACK, @battle, false) ||
+          Battle::AbilityEffects.triggerStatLossImmunityNonIgnorable(self.ability, self, :ATTACK, @battle, false))
         @battle.pbDisplay(_INTL("{1}'s {2} prevented {3}'s {4} from working!",
                                 pbThis, abilityName, user.pbThis(true), user.abilityName))
         return false
       end
-      end
       allAllies.each do |b|
         next if !b.abilityActive?
         if Battle::AbilityEffects.triggerStatLossImmunityFromAlly(b.ability, b, self, :ATTACK, @battle, false)

Data/Scripts/011_Battle/002_Battler/006_Battler_AbilityAndItem.rb

@@ -378,7 +378,7 @@ class Battle::Battler
 
   def pbItemsOnUnnerveEnding
     @battle.pbPriority(true).each do |b|
-      b.pbHeldItemTriggerCheck if b.item && b.item.is_berry?
+      b.pbHeldItemTriggerCheck if b.item&.is_berry?
     end
   end
 

Data/Scripts/011_Battle/002_Battler/007_Battler_UseMove.rb

@@ -175,14 +175,13 @@ class Battle::Battler
     elsif @effects[PBEffects::Encore] > 0 && choice[1] >= 0 &&
           @battle.pbCanShowCommands?(@index)
       idxEncoredMove = pbEncoredMoveIndex
-      if idxEncoredMove >= 0 && @battle.pbCanChooseMove?(@index, idxEncoredMove, false)
-        if choice[1] != idxEncoredMove   # Change move if battler was Encored mid-round
+      if idxEncoredMove >= 0 && choice[1] != idxEncoredMove &&
+         @battle.pbCanChooseMove?(@index, idxEncoredMove, false)   # Change move if battler was Encored mid-round
         choice[1] = idxEncoredMove
         choice[2] = @moves[idxEncoredMove]
         choice[3] = -1   # No target chosen
       end
     end
-    end
     # Labels the move being used as "move"
     move = choice[2]
     return if !move   # if move was not chosen somehow
@@ -203,8 +202,7 @@ class Battle::Battler
     move = choice[2]   # In case disobedience changed the move to be used
     return if !move   # if move was not chosen somehow
     # Subtract PP
-    if !specialUsage
-      if !pbReducePP(move)
+    if !specialUsage && !pbReducePP(move)
       @battle.pbDisplay(_INTL("{1} used {2}!", pbThis, move.name))
       @battle.pbDisplay(_INTL("But there was no PP left for the move!"))
       @lastMoveUsed          = nil
@@ -216,7 +214,6 @@ class Battle::Battler
       pbEndTurn(choice)
       return
     end
-    end
     # Stance Change
     if isSpecies?(:AEGISLASH) && self.ability == :STANCECHANGE
       if move.damagingMove?
@@ -356,8 +353,9 @@ class Battle::Battler
       end
     end
     # Protean
-    if user.hasActiveAbility?([:LIBERO, :PROTEAN]) && !move.callsAnotherMove? && !move.snatched
-      if user.pbHasOtherType?(move.calcType) && !GameData::Type.get(move.calcType).pseudo_type
+    if user.hasActiveAbility?([:LIBERO, :PROTEAN]) &&
+       !move.callsAnotherMove? && !move.snatched &&
+       user.pbHasOtherType?(move.calcType) && !GameData::Type.get(move.calcType).pseudo_type
       @battle.pbShowAbilitySplash(user)
       user.pbChangeTypes(move.calcType)
       typeName = GameData::Type.get(move.calcType).name
@@ -372,7 +370,6 @@ class Battle::Battler
         targets = pbFindTargets(choice, move, user)
       end
     end
-    end
     #---------------------------------------------------------------------------
     magicCoater  = -1
     magicBouncer = -1
@@ -486,7 +483,7 @@ class Battle::Battler
         end
         pbProcessMoveHit(move, b, newTargets, 0, false) if success
         b.lastMoveFailed = true if !success
-        targets.each { |otherB| otherB.pbFaint if otherB && otherB.fainted? }
+        targets.each { |otherB| otherB.pbFaint if otherB&.fainted? }
         user.pbFaint if user.fainted?
       end
       # Magic Coat's bouncing back (move has no targets)
@@ -502,14 +499,14 @@ class Battle::Battler
             success = pbProcessMoveHit(move, mc, [], 0, false)
           end
           mc.lastMoveFailed = true if !success
-          targets.each { |b| b.pbFaint if b && b.fainted? }
+          targets.each { |b| b.pbFaint if b&.fainted? }
           user.pbFaint if user.fainted?
         end
       end
       # Move-specific effects after all hits
       targets.each { |b| move.pbEffectAfterAllHits(user, b) }
       # Faint if 0 HP
-      targets.each { |b| b.pbFaint if b && b.fainted? }
+      targets.each { |b| b.pbFaint if b&.fainted? }
       user.pbFaint if user.fainted?
       # External/general effects after all hits. Eject Button, Shell Bell, etc.
       pbEffectsAfterMove(user, targets, move, realNumHits)
@@ -707,7 +704,7 @@ class Battle::Battler
       @battle.pbPriority(true).each { |b| b.pbItemHPHealCheck }
       # Animate battlers fainting (checks all battlers rather than just targets
       # because Flame Burst's splash damage affects non-targets)
-      @battle.pbPriority(true).each { |b| b.pbFaint if b && b.fainted? }
+      @battle.pbPriority(true).each { |b| b.pbFaint if b&.fainted? }
     end
     @battle.pbJudgeCheckpoint(user, move)
     # Main effect (recoil/drain, etc.)
@@ -716,7 +713,7 @@ class Battle::Battler
       move.pbEffectAgainstTarget(user, b)
     end
     move.pbEffectGeneral(user)
-    targets.each { |b| b.pbFaint if b && b.fainted? }
+    targets.each { |b| b.pbFaint if b&.fainted? }
     user.pbFaint if user.fainted?
     # Additional effect
     if !user.hasActiveAbility?(:SHEERFORCE)
@@ -761,14 +758,13 @@ class Battle::Battler
       end
     end
     # Fainting
-    targets.each { |b| b.pbFaint if b && b.fainted? }
+    targets.each { |b| b.pbFaint if b&.fainted? }
     user.pbFaint if user.fainted?
     # Dragon Darts' second half of attack
-    if move.pbRepeatHit? && hitNum == 0
-      if targets.any? { |b| !b.fainted? && !b.damageState.unaffected }
+    if move.pbRepeatHit? && hitNum == 0 &&
+       targets.any? { |b| !b.fainted? && !b.damageState.unaffected }
       pbProcessMoveHit(move, user, all_targets, 1, skipAccuracyCheck)
     end
-    end
     return true
   end
 end

Data/Scripts/011_Battle/002_Battler/009_Battler_UseMoveSuccessChecks.rb

@@ -265,13 +265,11 @@ class Battle::Battler
       end
     end
     # Paralysis
-    if @status == :PARALYSIS
-      if @battle.pbRandom(100) < 25
+    if @status == :PARALYSIS && @battle.pbRandom(100) < 25
       pbContinueStatus
       @lastMoveFailed = true
       return false
     end
-    end
     # Infatuation
     if @effects[PBEffects::Attract] >= 0
       @battle.pbCommonAnimation("Attract", self)
@@ -358,11 +356,10 @@ class Battle::Battler
           end
           target.damageState.protected = true
           @battle.successStates[user.index].protected = true
-          if move.pbContactMove?(user) && user.affectedByContactEffect?
-            if user.pbCanLowerStatStage?(:ATTACK, target)
+          if move.pbContactMove?(user) && user.affectedByContactEffect? &&
+             user.pbCanLowerStatStage?(:ATTACK, target)
             user.pbLowerStatStage(:ATTACK, (Settings::MECHANICS_GENERATION >= 8) ? 1 : 2, target)
           end
-          end
           return false
         end
         # Spiky Shield
@@ -389,8 +386,9 @@ class Battle::Battler
           end
           target.damageState.protected = true
           @battle.successStates[user.index].protected = true
-          if move.pbContactMove?(user) && user.affectedByContactEffect?
-            user.pbPoison(target) if user.pbCanPoison?(target, false)
+          if move.pbContactMove?(user) && user.affectedByContactEffect? &&
+             user.pbCanPoison?(target, false)
+            user.pbPoison(target)
           end
           return false
         end
@@ -402,11 +400,10 @@ class Battle::Battler
           end
           target.damageState.protected = true
           @battle.successStates[user.index].protected = true
-          if move.pbContactMove?(user) && user.affectedByContactEffect?
-            if user.pbCanLowerStatStage?(:DEFENSE, target)
+          if move.pbContactMove?(user) && user.affectedByContactEffect? &&
+             user.pbCanLowerStatStage?(:DEFENSE, target)
             user.pbLowerStatStage(:DEFENSE, 2, target)
           end
-          end
           return false
         end
         # Mat Block
@@ -550,8 +547,8 @@ class Battle::Battler
         end
       end
       if target.effects[PBEffects::SkyDrop] >= 0 &&
-         target.effects[PBEffects::SkyDrop] != user.index
-        miss = true if !move.hitsFlyingTargets?
+         target.effects[PBEffects::SkyDrop] != user.index && !move.hitsFlyingTargets?
+        miss = true
       end
     end
     target.damageState.invulnerable = true if miss
@@ -572,9 +569,7 @@ class Battle::Battler
   def pbMissMessage(move, user, target)
     if target.damageState.affection_missed
       @battle.pbDisplay(_INTL("{1} avoided the move in time with your shout!", target.pbThis))
-    elsif move.pbTarget(user).num_targets > 1
-      @battle.pbDisplay(_INTL("{1} avoided the attack!", target.pbThis))
-    elsif target.effects[PBEffects::TwoTurnAttack]
+    elsif move.pbTarget(user).num_targets > 1 || target.effects[PBEffects::TwoTurnAttack]
       @battle.pbDisplay(_INTL("{1} avoided the attack!", target.pbThis))
     elsif !move.pbMissMessage(user, target)
       @battle.pbDisplay(_INTL("{1}'s attack missed!", user.pbThis))

Data/Scripts/011_Battle/002_Battler/010_Battler_UseMoveTriggerEffects.rb

@@ -45,28 +45,27 @@ class Battle::Battler
     end
     if target.opposes?(user)
       # Rage
-      if target.effects[PBEffects::Rage] && !target.fainted?
-        if target.pbCanRaiseStatStage?(:ATTACK, target)
+      if target.effects[PBEffects::Rage] && !target.fainted? &&
+         target.pbCanRaiseStatStage?(:ATTACK, target)
         @battle.pbDisplay(_INTL("{1}'s rage is building!", target.pbThis))
         target.pbRaiseStatStage(:ATTACK, 1, target)
       end
-      end
       # Beak Blast
       if target.effects[PBEffects::BeakBlast]
         PBDebug.log("[Lingering effect] #{target.pbThis}'s Beak Blast")
-        if move.pbContactMove?(user) && user.affectedByContactEffect?
-          target.pbBurn(user) if target.pbCanBurn?(user, false, self)
+        if move.pbContactMove?(user) && user.affectedByContactEffect? &&
+           target.pbCanBurn?(user, false, self)
+          target.pbBurn(user)
         end
       end
       # Shell Trap (make the trapper move next if the trap was triggered)
-      if target.effects[PBEffects::ShellTrap] &&
-         @battle.choices[target.index][0] == :UseMove && !target.movedThisRound?
-        if target.damageState.hpLost > 0 && !target.damageState.substitute && move.physicalMove?
+      if target.effects[PBEffects::ShellTrap] && move.physicalMove? &&
+         @battle.choices[target.index][0] == :UseMove && !target.movedThisRound? &&
+         target.damageState.hpLost > 0 && !target.damageState.substitute
         target.tookPhysicalHit              = true
         target.effects[PBEffects::MoveNext] = true
         target.effects[PBEffects::Quash]    = 0
       end
-      end
       # Grudge
       if target.effects[PBEffects::Grudge] && target.fainted?
         move.pp = 0
@@ -74,13 +73,12 @@ class Battle::Battler
                                 user.pbThis, move.name))
       end
       # Destiny Bond (recording that it should apply)
-      if target.effects[PBEffects::DestinyBond] && target.fainted?
-        if user.effects[PBEffects::DestinyBondTarget] < 0
+      if target.effects[PBEffects::DestinyBond] && target.fainted? &&
+         user.effects[PBEffects::DestinyBondTarget] < 0
         user.effects[PBEffects::DestinyBondTarget] = target.index
       end
     end
   end
-  end
 
   #=============================================================================
   # Effects after all hits (i.e. at end of move usage)
@@ -114,10 +112,10 @@ class Battle::Battler
     if user.abilityActive?
       Battle::AbilityEffects.triggerOnEndOfUsingMove(user.ability, user, targets, move, @battle)
     end
-    # Greninja - Battle Bond
     if !user.fainted? && !user.effects[PBEffects::Transform] &&
-       user.isSpecies?(:GRENINJA) && user.ability == :BATTLEBOND
-      if !@battle.pbAllFainted?(user.idxOpposingSide) &&
+       !@battle.pbAllFainted?(user.idxOpposingSide)
+      # Greninja - Battle Bond
+      if user.isSpecies?(:GRENINJA) && user.ability == :BATTLEBOND &&
          !@battle.battleBond[user.index & 1][user.pokemonIndex]
         numFainted = 0
         targets.each { |b| numFainted += 1 if b.damageState.fainted }
@@ -129,11 +127,8 @@ class Battle::Battler
           user.pbChangeForm(2, _INTL("{1} became Ash-Greninja!", user.pbThis))
         end
       end
-    end
       # Cramorant = Gulp Missile
-    if !user.fainted? && !user.effects[PBEffects::Transform] &&
-       user.isSpecies?(:CRAMORANT) && user.ability == :GULPMISSILE && user.form == 0
-      if !@battle.pbAllFainted?(user.idxOpposingSide) &&
+      if user.isSpecies?(:CRAMORANT) && user.ability == :GULPMISSILE && user.form == 0 &&
          ((move.id == :SURF && numHits > 0) || (move.id == :DIVE && move.chargingTurn))
         # NOTE: Intentionally no ability splash or message here.
         user.pbChangeForm((user.hp > user.totalhp / 2) ? 1 : 2, nil)
@@ -181,51 +176,42 @@ class Battle::Battler
   def pbEffectsAfterMove2(user, targets, move, numHits, switched_battlers)
     # Target's held item (Eject Button, Red Card, Eject Pack)
     @battle.pbPriority(true).each do |b|
-      if targets.any? { |targetB| targetB.index == b.index }
-        if !b.damageState.unaffected && b.damageState.calcDamage > 0 && b.itemActive?
+      if targets.any? { |targetB| targetB.index == b.index } &&
+         !b.damageState.unaffected && b.damageState.calcDamage > 0 && b.itemActive?
         Battle::ItemEffects.triggerAfterMoveUseFromTarget(b.item, b, user, move, switched_battlers, @battle)
       end
-      end
       # Target's Eject Pack
-      if switched_battlers.empty? && b.index != user.index
-        if b.pbItemOnStatDropped(user)
+      if switched_battlers.empty? && b.index != user.index && b.pbItemOnStatDropped(user)
         switched_battlers.push(b.index)
       end
     end
-    end
     # User's held item (Life Orb, Shell Bell, Throat Spray, Eject Pack)
     if !switched_battlers.include?(user.index) && user.itemActive?   # Only if user hasn't switched out
       Battle::ItemEffects.triggerAfterMoveUseFromUser(user.item, user, targets, move, numHits, @battle)
     end
     # Target's ability (Berserk, Color Change, Emergency Exit, Pickpocket, Wimp Out)
     @battle.pbPriority(true).each do |b|
-      if targets.any? { |targetB| targetB.index == b.index }
-        if !b.damageState.unaffected && !switched_battlers.include?(b.index) && b.abilityActive?
+      if targets.any? { |targetB| targetB.index == b.index } &&
+         !b.damageState.unaffected && !switched_battlers.include?(b.index) && b.abilityActive?
         Battle::AbilityEffects.triggerAfterMoveUseFromTarget(b.ability, b, user, move, switched_battlers, @battle)
       end
-      end
       # Target's Emergency Exit, Wimp Out (including for Pokémon hurt by Flame Burst)
-      if switched_battlers.empty? && move.damagingMove? && b.index != user.index
-        if b.pbAbilitiesOnDamageTaken(user)
+      if switched_battlers.empty? && move.damagingMove? &&
+         b.index != user.index && b.pbAbilitiesOnDamageTaken(user)
         switched_battlers.push(b.index)
       end
     end
   end
-  end
 
   # Everything in this method is negated by Sheer Force.
   def pbEffectsAfterMove3(user, targets, move, numHits, switched_battlers)
     # User's held item that switches it out (Eject Pack)
-    if switched_battlers.empty?
-      if user.pbItemOnStatDropped(user)
+    if switched_battlers.empty? && user.pbItemOnStatDropped(user)
       switched_battlers.push(user.index)
     end
-    end
     # User's ability (Emergency Exit, Wimp Out)
-    if switched_battlers.empty? && move.damagingMove?
-      if user.pbAbilitiesOnDamageTaken(user)
+    if switched_battlers.empty? && move.damagingMove? && user.pbAbilitiesOnDamageTaken(user)
       switched_battlers.push(user.index)
     end
   end
 end
-end

Data/Scripts/011_Battle/003_Move/001_Battle_Move.rb

@@ -140,7 +140,7 @@ class Battle::Move
   def ignoresSubstitute?(user)   # user is the Pokémon using this move
     if Settings::MECHANICS_GENERATION >= 6
       return true if soundMove?
-      return true if user && user.hasActiveAbility?(:INFILTRATOR)
+      return true if user&.hasActiveAbility?(:INFILTRATOR)
     end
     return false
   end

Data/Scripts/011_Battle/003_Move/003_Move_UsageCalculations.rb

@@ -31,28 +31,29 @@ class Battle::Move
   #=============================================================================
   def pbCalcTypeModSingle(moveType, defType, user, target)
     ret = Effectiveness.calculate_one(moveType, defType)
+    if Effectiveness.ineffective_type?(moveType, defType)
       # Ring Target
       if target.hasActiveItem?(:RINGTARGET)
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if Effectiveness.ineffective_type?(moveType, defType)
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
       end
       # Foresight
-    if user.hasActiveAbility?(:SCRAPPY) || target.effects[PBEffects::Foresight]
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :GHOST &&
-                                                   Effectiveness.ineffective_type?(moveType, defType)
+      if (user.hasActiveAbility?(:SCRAPPY) || target.effects[PBEffects::Foresight]) &&
+         defType == :GHOST
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
       end
       # Miracle Eye
-    if target.effects[PBEffects::MiracleEye]
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :DARK &&
-                                                   Effectiveness.ineffective_type?(moveType, defType)
+      if target.effects[PBEffects::MiracleEye] && defType == :DARK
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
       end
+    elsif Effectiveness.super_effective_type?(moveType, defType)
       # Delta Stream's weather
-    if target.effectiveWeather == :StrongWinds
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :FLYING &&
-                                                   Effectiveness.super_effective_type?(moveType, defType)
+      if target.effectiveWeather == :StrongWinds && defType == :FLYING
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
+      end
     end
     # Grounded Flying-type Pokémon become susceptible to Ground moves
-    if !target.airborne?
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :FLYING && moveType == :GROUND
+    if !target.airborne? && defType == :FLYING && moveType == :GROUND
+      ret = Effectiveness::NORMAL_EFFECTIVE_ONE
     end
     return ret
   end
@@ -493,9 +494,9 @@ class Battle::Move
   def pbAdditionalEffectChance(user, target, effectChance = 0)
     return 0 if target.hasActiveAbility?(:SHIELDDUST) && !@battle.moldBreaker
     ret = (effectChance > 0) ? effectChance : @addlEffect
-    if Settings::MECHANICS_GENERATION >= 6 || @function != "EffectDependsOnEnvironment"
-      ret *= 2 if user.hasActiveAbility?(:SERENEGRACE) ||
-                  user.pbOwnSide.effects[PBEffects::Rainbow] > 0
+    if (Settings::MECHANICS_GENERATION >= 6 || @function != "EffectDependsOnEnvironment") &&
+       (user.hasActiveAbility?(:SERENEGRACE) || user.pbOwnSide.effects[PBEffects::Rainbow] > 0)
+      ret *= 2
     end
     ret = 100 if $DEBUG && Input.press?(Input::CTRL)
     return ret
@@ -507,9 +508,8 @@ class Battle::Move
     return 0 if flinchingMove?
     return 0 if target.hasActiveAbility?(:SHIELDDUST) && !@battle.moldBreaker
     ret = 0
-    if user.hasActiveAbility?(:STENCH, true)
-      ret = 10
-    elsif user.hasActiveItem?([:KINGSROCK, :RAZORFANG], true)
+    if user.hasActiveAbility?(:STENCH, true) ||
+       user.hasActiveItem?([:KINGSROCK, :RAZORFANG], true)
       ret = 10
     end
     ret *= 2 if user.hasActiveAbility?(:SERENEGRACE) ||

Data/Scripts/011_Battle/003_Move/006_MoveEffects_BattlerStats.rb

@@ -1427,9 +1427,7 @@ class Battle::Move::RaiseUserAndAlliesAtkDef1 < Battle::Move
   def pbEffectAgainstTarget(user, target)
     showAnim = true
     if target.pbCanRaiseStatStage?(:ATTACK, user, self)
-      if target.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
-        showAnim = false
-      end
+      showAnim = false if target.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
     end
     if target.pbCanRaiseStatStage?(:DEFENSE, user, self)
       target.pbRaiseStatStage(:DEFENSE, 1, user, showAnim)
@@ -1477,9 +1475,7 @@ class Battle::Move::RaisePlusMinusUserAndAlliesAtkSpAtk1 < Battle::Move
   def pbEffectAgainstTarget(user, target)
     showAnim = true
     if target.pbCanRaiseStatStage?(:ATTACK, user, self)
-      if target.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
-        showAnim = false
-      end
+      showAnim = false if target.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
     end
     if target.pbCanRaiseStatStage?(:SPECIAL_ATTACK, user, self)
       target.pbRaiseStatStage(:SPECIAL_ATTACK, 1, user, showAnim)
@@ -1532,9 +1528,7 @@ class Battle::Move::RaisePlusMinusUserAndAlliesDefSpDef1 < Battle::Move
   def pbEffectAgainstTarget(user, target)
     showAnim = true
     if target.pbCanRaiseStatStage?(:DEFENSE, user, self)
-      if target.pbRaiseStatStage(:DEFENSE, 1, user, showAnim)
-        showAnim = false
-      end
+      showAnim = false if target.pbRaiseStatStage(:DEFENSE, 1, user, showAnim)
     end
     if target.pbCanRaiseStatStage?(:SPECIAL_DEFENSE, user, self)
       target.pbRaiseStatStage(:SPECIAL_DEFENSE, 1, user, showAnim)
@@ -1579,9 +1573,7 @@ class Battle::Move::RaiseGroundedGrassBattlersAtkSpAtk1 < Battle::Move
   def pbEffectAgainstTarget(user, target)
     showAnim = true
     if target.pbCanRaiseStatStage?(:ATTACK, user, self)
-      if target.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
-        showAnim = false
-      end
+      showAnim = false if target.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
     end
     if target.pbCanRaiseStatStage?(:SPECIAL_ATTACK, user, self)
       target.pbRaiseStatStage(:SPECIAL_ATTACK, 1, user, showAnim)
@@ -1729,9 +1721,7 @@ class Battle::Move::UserStealTargetPositiveStatStages < Battle::Move
       GameData::Stat.each_battle do |s|
         next if target.stages[s.id] <= 0
         if user.pbCanRaiseStatStage?(s.id, user, self)
-          if user.pbRaiseStatStage(s.id, target.stages[s.id], user, showAnim)
-            showAnim = false
-          end
+          showAnim = false if user.pbRaiseStatStage(s.id, target.stages[s.id], user, showAnim)
         end
         target.statsLoweredThisRound = true
         target.statsDropped = true

Data/Scripts/011_Battle/003_Move/007_MoveEffects_BattlerOther.rb

@@ -209,8 +209,8 @@ class Battle::Move::ParalyzeFlinchTarget < Battle::Move
     return if target.damageState.substitute
     chance = pbAdditionalEffectChance(user, target, 10)
     return if chance == 0
-    if @battle.pbRandom(100) < chance
-      target.pbParalyze(user) if target.pbCanParalyze?(user, false, self)
+    if target.pbCanParalyze?(user, false, self) && @battle.pbRandom(100) < chance
+      target.pbParalyze(user)
     end
     target.pbFlinch(user) if @battle.pbRandom(100) < chance
   end
@@ -258,8 +258,8 @@ class Battle::Move::BurnFlinchTarget < Battle::Move
     return if target.damageState.substitute
     chance = pbAdditionalEffectChance(user, target, 10)
     return if chance == 0
-    if @battle.pbRandom(100) < chance
-      target.pbBurn(user) if target.pbCanBurn?(user, false, self)
+    if target.pbCanBurn?(user, false, self) && @battle.pbRandom(100) < chance
+      target.pbBurn(user)
     end
     target.pbFlinch(user) if @battle.pbRandom(100) < chance
   end
@@ -317,8 +317,8 @@ class Battle::Move::FreezeFlinchTarget < Battle::Move
     return if target.damageState.substitute
     chance = pbAdditionalEffectChance(user, target, 10)
     return if chance == 0
-    if @battle.pbRandom(100) < chance
-      target.pbFreeze if target.pbCanFreeze?(user, false, self)
+    if target.pbCanFreeze?(user, false, self) && @battle.pbRandom(100) < chance
+      target.pbFreeze
     end
     target.pbFlinch(user) if @battle.pbRandom(100) < chance
   end
@@ -429,7 +429,7 @@ class Battle::Move::CureUserPartyStatus < Battle::Move
   def pbMoveFailed?(user, targets)
     has_effect = @battle.allSameSideBattlers(user).any? { |b| b.status != :NONE }
     if !has_effect
-      has_effect = @battle.pbParty(user.index).any? { |pkmn| pkmn && pkmn.able? && pkmn.status != :NONE }
+      has_effect = @battle.pbParty(user.index).any? { |pkmn| pkmn&.able? && pkmn.status != :NONE }
     end
     if !has_effect
       @battle.pbDisplay(_INTL("But it failed!"))

Data/Scripts/011_Battle/003_Move/009_MoveEffects_MultiHit.rb

@@ -221,14 +221,13 @@ end
 class Battle::Move::TwoTurnAttackOneTurnInSun < Battle::Move::TwoTurnMove
   def pbIsChargingTurn?(user)
     ret = super
-    if !user.effects[PBEffects::TwoTurnAttack]
-      if [:Sun, :HarshSun].include?(user.effectiveWeather)
+    if !user.effects[PBEffects::TwoTurnAttack] &&
+       [:Sun, :HarshSun].include?(user.effectiveWeather)
       @powerHerb = false
       @chargingTurn = true
       @damagingTurn = true
       return false
     end
-    end
     return ret
   end
 

Data/Scripts/011_Battle/003_Move/012_MoveEffects_ChangeMoveEffect.rb

@@ -175,9 +175,7 @@ class Battle::Move::CurseTargetOrLowerUserSpd1RaiseUserAtkDef1 < Battle::Move
     end
     showAnim = true
     if user.pbCanRaiseStatStage?(:ATTACK, user, self)
-      if user.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
-        showAnim = false
-      end
+      showAnim = false if user.pbRaiseStatStage(:ATTACK, 1, user, showAnim)
     end
     if user.pbCanRaiseStatStage?(:DEFENSE, user, self)
       user.pbRaiseStatStage(:DEFENSE, 1, user, showAnim)
@@ -562,9 +560,7 @@ class Battle::Move::PowerDependsOnUserStockpile < Battle::Move
     showAnim = true
     if user.effects[PBEffects::StockpileDef] > 0 &&
        user.pbCanLowerStatStage?(:DEFENSE, user, self)
-      if user.pbLowerStatStage(:DEFENSE, user.effects[PBEffects::StockpileDef], user, showAnim)
-        showAnim = false
-      end
+      showAnim = false if user.pbLowerStatStage(:DEFENSE, user.effects[PBEffects::StockpileDef], user, showAnim)
     end
     if user.effects[PBEffects::StockpileSpDef] > 0 &&
        user.pbCanLowerStatStage?(:SPECIAL_DEFENSE, user, self)
@@ -611,11 +607,9 @@ class Battle::Move::HealUserDependingOnUserStockpile < Battle::Move
     @battle.pbDisplay(_INTL("{1}'s stockpiled effect wore off!", user.pbThis))
     showAnim = true
     if user.effects[PBEffects::StockpileDef] > 0 &&
-       user.pbCanLowerStatStage?(:DEFENSE, user, self)
-      if user.pbLowerStatStage(:DEFENSE, user.effects[PBEffects::StockpileDef], user, showAnim)
+       user.pbCanLowerStatStage?(:DEFENSE, user, self) && user.pbLowerStatStage(:DEFENSE, user.effects[PBEffects::StockpileDef], user, showAnim)
         showAnim = false
       end
-    end
     if user.effects[PBEffects::StockpileSpDef] > 0 &&
        user.pbCanLowerStatStage?(:SPECIAL_DEFENSE, user, self)
       user.pbLowerStatStage(:SPECIAL_DEFENSE, user.effects[PBEffects::StockpileSpDef], user, showAnim)

Data/Scripts/011_Battle/004_Scene/001_Battle_Scene.rb

@@ -112,24 +112,24 @@ class Battle::Scene
   end
 
   def pbFrameUpdate(cw = nil)
-    cw.update if cw
+    cw&.update
     @battle.battlers.each_with_index do |b, i|
       next if !b
-      @sprites["dataBox_#{i}"].update(@frameCounter) if @sprites["dataBox_#{i}"]
-      @sprites["pokemon_#{i}"].update(@frameCounter) if @sprites["pokemon_#{i}"]
-      @sprites["shadow_#{i}"].update(@frameCounter) if @sprites["shadow_#{i}"]
+      @sprites["dataBox_#{i}"]&.update(@frameCounter)
+      @sprites["pokemon_#{i}"]&.update(@frameCounter)
+      @sprites["shadow_#{i}"]&.update(@frameCounter)
     end
   end
 
   def pbRefresh
     @battle.battlers.each_with_index do |b, i|
       next if !b
-      @sprites["dataBox_#{i}"].refresh if @sprites["dataBox_#{i}"]
+      @sprites["dataBox_#{i}"]&.refresh
     end
   end
 
   def pbRefreshOne(idxBattler)
-    @sprites["dataBox_#{idxBattler}"].refresh if @sprites["dataBox_#{idxBattler}"]
+    @sprites["dataBox_#{idxBattler}"]&.refresh
   end
 
   def pbRefreshEverything

Data/Scripts/011_Battle/004_Scene/003_Scene_ChooseCommands.rb

@@ -70,7 +70,7 @@ class Battle::Scene
     cw = @sprites["fightWindow"]
     cw.battler = battler
     moveIndex = 0
-    if battler.moves[@lastMove[idxBattler]] && battler.moves[@lastMove[idxBattler]].id
+    if battler.moves[@lastMove[idxBattler]]&.id
       moveIndex = @lastMove[idxBattler]
     end
     cw.shiftMode = (@battle.pbCanShift?(idxBattler)) ? 1 : 0
@@ -98,14 +98,14 @@ class Battle::Scene
       if Input.trigger?(Input::LEFT)
         cw.index -= 1 if (cw.index & 1) == 1
       elsif Input.trigger?(Input::RIGHT)
-        if battler.moves[cw.index + 1] && battler.moves[cw.index + 1].id
-          cw.index += 1 if (cw.index & 1) == 0
+        if battler.moves[cw.index + 1]&.id && (cw.index & 1) == 0
+          cw.index += 1
         end
       elsif Input.trigger?(Input::UP)
         cw.index -= 2 if (cw.index & 2) == 2
       elsif Input.trigger?(Input::DOWN)
-        if battler.moves[cw.index + 2] && battler.moves[cw.index + 2].id
-          cw.index += 2 if (cw.index & 2) == 0
+        if battler.moves[cw.index + 2]&.id && (cw.index & 2) == 0
+          cw.index += 2
         end
       end
       pbPlayCursorSE if cw.index != oldIndex

Data/Scripts/011_Battle/004_Scene/004_Scene_PlayAnimations.rb

@@ -137,8 +137,8 @@ class Battle::Scene
         a[2] = true if a[1].animDone?
       end
       pbUpdate
-      if !inPartyAnimation?
-        break if !sendOutAnims.any? { |a| !a[2] }
+      if !inPartyAnimation? && !sendOutAnims.any? { |a| !a[2] }
+        break
       end
     end
     fadeAnim.dispose
@@ -165,7 +165,7 @@ class Battle::Scene
     # Recall animation
     recallAnim = Animation::BattlerRecall.new(@sprites, @viewport, idxBattler)
     loop do
-      recallAnim.update if recallAnim
+      recallAnim&.update
       pbUpdate
       break if recallAnim.animDone?
     end
@@ -495,7 +495,7 @@ class Battle::Scene
     animID = pbFindMoveAnimation(moveID, user.index, hitNum)
     return if !animID
     anim = animID[0]
-    target = (targets && targets.is_a?(Array)) ? targets[0] : targets
+    target = (targets.is_a?(Array)) ? targets[0] : targets
     animations = pbLoadBattleAnimations
     return if !animations
     pbSaveShadows {
@@ -510,7 +510,7 @@ class Battle::Scene
   # Plays a common animation.
   def pbCommonAnimation(animName, user = nil, target = nil)
     return if nil_or_empty?(animName)
-    target = target[0] if target && target.is_a?(Array)
+    target = target[0] if target.is_a?(Array)
     animations = pbLoadBattleAnimations
     return if !animations
     animations.each do |a|
@@ -534,7 +534,7 @@ class Battle::Scene
     animPlayer = PBAnimationPlayerX.new(animation, user, target, self, oppMove)
     # Apply a transformation to the animation based on where the user and target
     # actually are. Get the centres of each sprite.
-    userHeight = (userSprite && userSprite.bitmap && !userSprite.bitmap.disposed?) ? userSprite.bitmap.height : 128
+    userHeight = (userSprite&.bitmap && !userSprite.bitmap.disposed?) ? userSprite.bitmap.height : 128
     if targetSprite
       targetHeight = (targetSprite.bitmap && !targetSprite.bitmap.disposed?) ? targetSprite.bitmap.height : 128
     else

Data/Scripts/011_Battle/004_Scene/005_Battle_Scene_Menus.rb

@@ -161,7 +161,7 @@ class Battle::Scene::CommandMenu < Battle::Scene::MenuBase
 
   def dispose
     super
-    @buttonBitmap.dispose if @buttonBitmap
+    @buttonBitmap&.dispose
   end
 
   def z=(value)
@@ -191,7 +191,7 @@ class Battle::Scene::CommandMenu < Battle::Scene::MenuBase
 
   def refresh
     @msgBox.refresh
-    @cmdWindow.refresh if @cmdWindow
+    @cmdWindow&.refresh
     refreshButtons
   end
 end
@@ -310,10 +310,10 @@ class Battle::Scene::FightMenu < Battle::Scene::MenuBase
 
   def dispose
     super
-    @buttonBitmap.dispose if @buttonBitmap
-    @typeBitmap.dispose if @typeBitmap
-    @megaEvoBitmap.dispose if @megaEvoBitmap
-    @shiftBitmap.dispose if @shiftBitmap
+    @buttonBitmap&.dispose
+    @typeBitmap&.dispose
+    @megaEvoBitmap&.dispose
+    @shiftBitmap&.dispose
   end
 
   def z=(value)
@@ -510,7 +510,7 @@ class Battle::Scene::TargetMenu < Battle::Scene::MenuBase
 
   def dispose
     super
-    @buttonBitmap.dispose if @buttonBitmap
+    @buttonBitmap&.dispose
   end
 
   def z=(value)

Data/Scripts/011_Battle/004_Scene/006_Battle_Scene_Objects.rb

@@ -52,7 +52,7 @@ class Battle::Scene::PokemonDataBox < SpriteWrapper
       bgFilename = ["Graphics/Pictures/Battle/databox_thin",
                     "Graphics/Pictures/Battle/databox_thin_foe"][@battler.index % 2]
     end
-    @databoxBitmap.dispose if @databoxBitmap
+    @databoxBitmap&.dispose
     @databoxBitmap = AnimatedBitmap.new(bgFilename)
     # Determine the co-ordinates of the data box and the left edge padding width
     if onPlayerSide
@@ -500,7 +500,7 @@ class Battle::Scene::BattlerSprite < RPG::Sprite
   end
 
   def dispose
-    @_iconBitmap.dispose if @_iconBitmap
+    @_iconBitmap&.dispose
     @_iconBitmap = nil
     self.bitmap = nil if !self.disposed?
     super
@@ -552,7 +552,7 @@ class Battle::Scene::BattlerSprite < RPG::Sprite
 
   def setPokemonBitmap(pkmn, back = false)
     @pkmn = pkmn
-    @_iconBitmap.dispose if @_iconBitmap
+    @_iconBitmap&.dispose
     @_iconBitmap = GameData::Species.sprite_bitmap_from_pokemon(@pkmn, back)
     self.bitmap = (@_iconBitmap) ? @_iconBitmap.bitmap : nil
     pbSetPosition
@@ -563,7 +563,7 @@ class Battle::Scene::BattlerSprite < RPG::Sprite
   # recommendation is to create a PictureEx animation and push it into
   # the @battleAnimations array.
   def pbPlayIntroAnimation(pictureEx = nil)
-    @pkmn.play_cry if @pkmn
+    @pkmn&.play_cry
   end
 
   QUARTER_ANIM_PERIOD = Graphics.frame_rate * 3 / 20
@@ -617,7 +617,7 @@ class Battle::Scene::BattlerShadowSprite < RPG::Sprite
   end
 
   def dispose
-    @_iconBitmap.dispose if @_iconBitmap
+    @_iconBitmap&.dispose
     @_iconBitmap = nil
     self.bitmap = nil if !self.disposed?
     super
@@ -647,7 +647,7 @@ class Battle::Scene::BattlerShadowSprite < RPG::Sprite
 
   def setPokemonBitmap(pkmn)
     @pkmn = pkmn
-    @_iconBitmap.dispose if @_iconBitmap
+    @_iconBitmap&.dispose
     @_iconBitmap = GameData::Species.shadow_bitmap_from_pokemon(@pkmn)
     self.bitmap = (@_iconBitmap) ? @_iconBitmap.bitmap : nil
     pbSetPosition

Data/Scripts/011_Battle/004_Scene/007_Battle_Scene_BaseAnimation.rb

@@ -10,7 +10,7 @@ class Battle::Scene::Animation
   end
 
   def dispose
-    @tempSprites.each { |s| s.dispose if s }
+    @tempSprites.each { |s| s&.dispose }
   end
 
   def createProcesses; end
@@ -47,7 +47,7 @@ class Battle::Scene::Animation
 
   def update
     return if @animDone
-    @tempSprites.each { |s| s.update if s }
+    @tempSprites.each { |s| s&.update }
     finished = true
     @pictureEx.each_with_index do |p, i|
       next if !p.running?

Data/Scripts/011_Battle/004_Scene/008_Battle_Scene_Animations.rb

@@ -140,9 +140,9 @@ class Battle::Scene::Animation::LineupAppear < Battle::Scene::Animation
     startsIndex = idxBall / ballsPerTrainer
     teamIndex = idxBall % ballsPerTrainer
     ret = @partyStarts[startsIndex] + teamIndex
-    if startsIndex < @partyStarts.length - 1
+    if startsIndex < @partyStarts.length - 1 && ret >= @partyStarts[startsIndex + 1]
       # There is a later trainer, don't spill over into its team
-      return -1 if ret >= @partyStarts[startsIndex + 1]
+      return -1
     end
     return ret
   end
@@ -332,7 +332,7 @@ class Battle::Scene::Animation::PlayerFade < Battle::Scene::Animation
     end
     # Move and fade party bar/balls
     delay = 3
-    if @sprites["partyBar_0"] && @sprites["partyBar_0"].visible
+    if @sprites["partyBar_0"]&.visible
       partyBar = addSprite(@sprites["partyBar_0"])
       partyBar.moveDelta(delay, 16, -Graphics.width / 4, 0) if @fullAnim
       partyBar.moveOpacity(delay, 12, 0)
@@ -377,7 +377,7 @@ class Battle::Scene::Animation::TrainerFade < Battle::Scene::Animation
     end
     # Move and fade party bar/balls
     delay = 3
-    if @sprites["partyBar_1"] && @sprites["partyBar_1"].visible
+    if @sprites["partyBar_1"]&.visible
       partyBar = addSprite(@sprites["partyBar_1"])
       partyBar.moveDelta(delay, 16, Graphics.width / 4, 0) if @fullAnim
       partyBar.moveOpacity(delay, 12, 0)
@@ -722,13 +722,11 @@ class Battle::Scene::Animation::PokeballThrowCapture < Battle::Scene::Animation
     ball.setZ(0, batSprite.z + 1)
     @ballSpriteIndex = (@success) ? @tempSprites.length - 1 : -1
     # Set up trainer sprite (only visible in Safari Zone battles)
-    if @showingTrainer && traSprite
-      if traSprite.bitmap.width >= traSprite.bitmap.height * 2
+    if @showingTrainer && traSprite && traSprite.bitmap.width >= traSprite.bitmap.height * 2
       trainer = addSprite(traSprite, PictureOrigin::Bottom)
       # Trainer animation
       ballStartX, ballStartY = trainerThrowingFrames(ball, trainer, traSprite)
     end
-    end
     delay = ball.totalDuration   # 0 or 7
     # Poké Ball arc animation
     ball.setSE(delay, "Battle throw")

Data/Scripts/011_Battle/005_AI/002_AI_Item.rb

@@ -115,13 +115,11 @@ class Battle::AI
         end
       end
       # Log Full Restores (HP healer and status curer)
-      if losthp > 0 || battler.status != :NONE
-        if fullRestoreItems.include?(i)
+      if fullRestoreItems.include?(i) && (losthp > 0 || battler.status != :NONE)
         usableHPItems.push([i, (preferFullRestore) ? 3 : 7, 999])
         usableStatusItems.push([i, (preferFullRestore) ? 3 : 9])
         next
       end
-      end
       # Log single status-curing items
       if oneStatusItems.include?(i)
         usableStatusItems.push([i, 5])

Data/Scripts/011_Battle/005_AI/003_AI_Switch.rb

@@ -48,8 +48,8 @@ class Battle::AI
        skill >= PBTrainerAI.highSkill
       toxicHP = battler.totalhp / 16
       nextToxicHP = toxicHP * (battler.effects[PBEffects::Toxic] + 1)
-      if battler.hp <= nextToxicHP && battler.hp > toxicHP * 2
-        shouldSwitch = true if pbAIRandom(100) < 80
+      if battler.hp <= nextToxicHP && battler.hp > toxicHP * 2 && pbAIRandom(100) < 80
+        shouldSwitch = true
       end
     end
     # Pokémon is Encored into an unfavourable move
@@ -62,8 +62,8 @@ class Battle::AI
           scoreSum += pbGetMoveScore(battler.moves[idxEncoredMove], battler, b, skill)
           scoreCount += 1
         end
-        if scoreCount > 0 && scoreSum / scoreCount <= 20
-          shouldSwitch = true if pbAIRandom(100) < 80
+        if scoreCount > 0 && scoreSum / scoreCount <= 20 && pbAIRandom(100) < 80
+          shouldSwitch = true
         end
       end
     end
@@ -72,9 +72,9 @@ class Battle::AI
     if @battle.pbSideSize(battler.index + 1) == 1 &&
        !battler.pbDirectOpposing.fainted? && skill >= PBTrainerAI.highSkill
       opp = battler.pbDirectOpposing
-      if opp.effects[PBEffects::HyperBeam] > 0 ||
-         (opp.hasActiveAbility?(:TRUANT) && opp.effects[PBEffects::Truant])
-        shouldSwitch = false if pbAIRandom(100) < 80
+      if (opp.effects[PBEffects::HyperBeam] > 0 ||
+         (opp.hasActiveAbility?(:TRUANT) && opp.effects[PBEffects::Truant])) && pbAIRandom(100) < 80
+        shouldSwitch = false
       end
     end
     # Sudden Death rule - I'm not sure what this means
@@ -103,9 +103,8 @@ class Battle::AI
           # Don't switch to this if too little HP
           if spikes > 0
             spikesDmg = [8, 6, 4][spikes - 1]
-            if pkmn.hp <= pkmn.totalhp / spikesDmg
-              next if !pkmn.hasType?(:FLYING) && !pkmn.hasActiveAbility?(:LEVITATE)
-            end
+            next if pkmn.hp <= pkmn.totalhp / spikesDmg &&
+                    !pkmn.hasType?(:FLYING) && !pkmn.hasActiveAbility?(:LEVITATE)
           end
         end
         # moveType is the type of the target's last used move
@@ -136,7 +135,7 @@ class Battle::AI
         end
         if @battle.pbRegisterSwitch(idxBattler, list[0])
           PBDebug.log("[AI] #{battler.pbThis} (#{idxBattler}) will switch with " +
-                      "#{@battle.pbParty(idxBattler)[list[0]].name}")
+                      @battle.pbParty(idxBattler)[list[0]].name)
           return true
         end
       end

Data/Scripts/011_Battle/005_AI/004_AI_Move.rb

@@ -61,9 +61,9 @@ class Battle::AI
     # Decide whether all choices are bad, and if so, try switching instead
     if !wildBattler && skill >= PBTrainerAI.highSkill
       badMoves = false
-      if (maxScore <= 20 && user.turnCount > 2) ||
-         (maxScore <= 40 && user.turnCount > 5)
-        badMoves = true if pbAIRandom(100) < 80
+      if ((maxScore <= 20 && user.turnCount > 2) ||
+         (maxScore <= 40 && user.turnCount > 5)) && pbAIRandom(100) < 80
+        badMoves = true
       end
       if !badMoves && totalScore < 100 && user.turnCount > 1
         badMoves = true
@@ -160,15 +160,14 @@ class Battle::AI
     return 0 if score <= 0
     if skill >= PBTrainerAI.mediumSkill
       # Prefer damaging moves if AI has no more Pokémon or AI is less clever
-      if @battle.pbAbleNonActiveCount(user.idxOwnSide) == 0
-        if !(skill >= PBTrainerAI.highSkill && @battle.pbAbleNonActiveCount(target.idxOwnSide) > 0)
+      if @battle.pbAbleNonActiveCount(user.idxOwnSide) == 0 &&
+         !(skill >= PBTrainerAI.highSkill && @battle.pbAbleNonActiveCount(target.idxOwnSide) > 0)
         if move.statusMove?
           score /= 1.5
         elsif target.hp <= target.totalhp / 2
           score *= 1.5
         end
       end
-      end
       # Don't prefer attacking the target if they'd be semi-invulnerable
       if skill >= PBTrainerAI.highSkill && move.accuracy > 0 &&
          (target.semiInvulnerable? || target.effects[PBEffects::SkyDrop] >= 0)
@@ -266,19 +265,17 @@ class Battle::AI
     end
     # Prefer flinching external effects (note that move effects which cause
     # flinching are dealt with in the function code part of score calculation)
-    if skill >= PBTrainerAI.mediumSkill && !move.flinchingMove?
-      if !target.hasActiveAbility?(:INNERFOCUS) &&
+    if skill >= PBTrainerAI.mediumSkill && !move.flinchingMove? &&
+       !target.hasActiveAbility?(:INNERFOCUS) &&
        !target.hasActiveAbility?(:SHIELDDUST) &&
        target.effects[PBEffects::Substitute] == 0
       canFlinch = false
-        if user.hasActiveItem?([:KINGSROCK, :RAZORFANG])
-          canFlinch = true
-        elsif user.hasActiveAbility?(:STENCH)
+      if user.hasActiveItem?([:KINGSROCK, :RAZORFANG]) ||
+         user.hasActiveAbility?(:STENCH)
         canFlinch = true
       end
       realDamage *= 1.3 if canFlinch
     end
-    end
     # Convert damage to percentage of target's remaining HP
     damagePercentage = realDamage * 100.0 / target.hp
     # Don't prefer weak attacks

Data/Scripts/011_Battle/005_AI/005_AI_Move_EffectScores.rb

@@ -859,9 +859,7 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetAttack1"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:ATTACK, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:ATTACK, user)
           score += target.stages[:ATTACK] * 20
           if skill >= PBTrainerAI.mediumSkill
             hasPhysicalAttack = false
@@ -876,6 +874,8 @@ class Battle::AI
               score -= 90
             end
           end
+        else
+          score -= 90
         end
       else
         score += 20 if target.stages[:ATTACK] > 0
@@ -892,10 +892,10 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetDefense1"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:DEFENSE, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:DEFENSE, user)
           score += target.stages[:DEFENSE] * 20
+        else
+          score -= 90
         end
       elsif target.stages[:DEFENSE] > 0
         score += 20
@@ -903,15 +903,15 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetSpeed1", "LowerTargetSpeed1WeakerInGrassyTerrain"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:SPEED, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:SPEED, user)
           score += target.stages[:SPEED] * 10
           if skill >= PBTrainerAI.highSkill
             aspeed = pbRoughStat(user, :SPEED, skill)
             ospeed = pbRoughStat(target, :SPEED, skill)
             score += 30 if aspeed < ospeed && aspeed * 2 > ospeed
           end
+        else
+          score -= 90
         end
       elsif user.stages[:SPEED] > 0
         score += 20
@@ -919,9 +919,7 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetSpAtk1"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:SPECIAL_ATTACK, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:SPECIAL_ATTACK, user)
           score += user.stages[:SPECIAL_ATTACK] * 20
           if skill >= PBTrainerAI.mediumSkill
             hasSpecicalAttack = false
@@ -936,6 +934,8 @@ class Battle::AI
               score -= 90
             end
           end
+        else
+          score -= 90
         end
       else
         score += 20 if user.stages[:SPECIAL_ATTACK] > 0
@@ -952,10 +952,10 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetSpDef1"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:SPECIAL_DEFENSE, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:SPECIAL_DEFENSE, user)
           score += target.stages[:SPECIAL_DEFENSE] * 20
+        else
+          score -= 90
         end
       elsif target.stages[:SPECIAL_DEFENSE] > 0
         score += 20
@@ -963,10 +963,10 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetAccuracy1", "LowerTargetAccuracy2", "LowerTargetAccuracy3"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:ACCURACY, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:ACCURACY, user)
           score += target.stages[:ACCURACY] * 10
+        else
+          score -= 90
         end
       elsif target.stages[:ACCURACY] > 0
         score += 20
@@ -974,10 +974,10 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetEvasion1", "LowerTargetEvasion2", "LowerTargetEvasion3"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:EVASION, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:EVASION, user)
           score += target.stages[:EVASION] * 10
+        else
+          score -= 90
         end
       elsif target.stages[:EVASION] > 0
         score += 20
@@ -985,10 +985,10 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetEvasion1RemoveSideEffects"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:EVASION, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:EVASION, user)
           score += target.stages[:EVASION] * 10
+        else
+          score -= 90
         end
       elsif target.stages[:EVASION] > 0
         score += 20
@@ -1009,9 +1009,7 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetAttack2", "LowerTargetAttack3"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:ATTACK, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:ATTACK, user)
           score += 40 if user.turnCount == 0
           score += target.stages[:ATTACK] * 20
           if skill >= PBTrainerAI.mediumSkill
@@ -1027,6 +1025,8 @@ class Battle::AI
               score -= 90
             end
           end
+        else
+          score -= 90
         end
       else
         score += 10 if user.turnCount == 0
@@ -1044,11 +1044,11 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetDefense2", "LowerTargetDefense3"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:DEFENSE, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:DEFENSE, user)
           score += 40 if user.turnCount == 0
           score += target.stages[:DEFENSE] * 20
+        else
+          score -= 90
         end
       else
         score += 10 if user.turnCount == 0
@@ -1057,9 +1057,7 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetSpeed2", "LowerTargetSpeed3"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:SPEED, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:SPEED, user)
           score += 20 if user.turnCount == 0
           score += target.stages[:SPEED] * 20
           if skill >= PBTrainerAI.highSkill
@@ -1067,6 +1065,8 @@ class Battle::AI
             ospeed = pbRoughStat(target, :SPEED, skill)
             score += 30 if aspeed < ospeed && aspeed * 2 > ospeed
           end
+        else
+          score -= 90
         end
       else
         score += 10 if user.turnCount == 0
@@ -1078,9 +1078,7 @@ class Battle::AI
          target.hasActiveAbility?(:OBLIVIOUS)
         score -= 90
       elsif move.statusMove?
-        if !target.pbCanLowerStatStage?(:SPECIAL_ATTACK, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:SPECIAL_ATTACK, user)
           score += 40 if user.turnCount == 0
           score += target.stages[:SPECIAL_ATTACK] * 20
           if skill >= PBTrainerAI.mediumSkill
@@ -1096,6 +1094,8 @@ class Battle::AI
               score -= 90
             end
           end
+        else
+          score -= 90
         end
       else
         score += 10 if user.turnCount == 0
@@ -1113,11 +1113,11 @@ class Battle::AI
     #---------------------------------------------------------------------------
     when "LowerTargetSpDef2", "LowerTargetSpDef3"
       if move.statusMove?
-        if !target.pbCanLowerStatStage?(:SPECIAL_DEFENSE, user)
-          score -= 90
-        else
+        if target.pbCanLowerStatStage?(:SPECIAL_DEFENSE, user)
           score += 40 if user.turnCount == 0
           score += target.stages[:SPECIAL_DEFENSE] * 20
+        else
+          score -= 90
         end
       else
         score += 10 if user.turnCount == 0
@@ -1323,9 +1323,7 @@ class Battle::AI
       end
     #---------------------------------------------------------------------------
     when "SetUserTypesToUserMoveType"
-      if !user.canChangeType?
-        score -= 90
-      else
+      if user.canChangeType?
         has_possible_type = false
         user.eachMoveWithIndex do |m, i|
           break if Settings::MECHANICS_GENERATION >= 6 && i > 0
@@ -1335,6 +1333,8 @@ class Battle::AI
           break
         end
         score -= 90 if !has_possible_type
+      else
+        score -= 90
       end
     #---------------------------------------------------------------------------
     when "SetUserTypesToResistLastAttack"
@@ -1350,9 +1350,7 @@ class Battle::AI
           aType = m.pbCalcType(user)
           break
         end
-        if !aType
-          score -= 90
-        else
+        if aType
           has_possible_type = false
           GameData::Type.each do |t|
             next if t.pseudo_type || user.pbHasType?(t.id) ||
@@ -1361,6 +1359,8 @@ class Battle::AI
             break
           end
           score -= 90 if !has_possible_type
+        else
+          score -= 90
         end
       end
     #---------------------------------------------------------------------------
@@ -1793,9 +1793,7 @@ class Battle::AI
       if target.effects[PBEffects::Encore] > 0
         score -= 90
       elsif aspeed > ospeed
-        if !target.lastRegularMoveUsed
-          score -= 90
-        else
+        if target.lastRegularMoveUsed
           moveData = GameData::Move.get(target.lastRegularMoveUsed)
           if moveData.category == 2 &&   # Status move
              [:User, :BothSides].include?(moveData.target)
@@ -1805,6 +1803,8 @@ class Battle::AI
                 Effectiveness.ineffective?(pbCalcTypeMod(moveData.type, target, user))
             score += 60
           end
+        else
+          score -= 90
         end
       end
     #---------------------------------------------------------------------------
@@ -2056,9 +2056,7 @@ class Battle::AI
       end
     #---------------------------------------------------------------------------
     when "SwitchOutUserPassOnEffects"
-      if !@battle.pbCanChooseNonActive?(user.index)
-        score -= 100
-      else
+      if @battle.pbCanChooseNonActive?(user.index)
         score -= 40 if user.effects[PBEffects::Confusion] > 0
         total = 0
         GameData::Stat.each_battle { |s| total += user.stages[s.id] }
@@ -2075,6 +2073,8 @@ class Battle::AI
           end
           score += 75 if !hasDamagingMove
         end
+      else
+        score -= 100
       end
     #---------------------------------------------------------------------------
     when "TrapTargetInBattle"
@@ -2505,9 +2505,7 @@ class Battle::AI
       end
     #---------------------------------------------------------------------------
     when "LowerTargetAttack1BypassSubstitute"
-      if !target.pbCanLowerStatStage?(:ATTACK, user)
-        score -= 90
-      else
+      if target.pbCanLowerStatStage?(:ATTACK, user)
         score += target.stages[:ATTACK] * 20
         if skill >= PBTrainerAI.mediumSkill
           hasPhysicalAttack = false
@@ -2522,6 +2520,8 @@ class Battle::AI
             score -= 90
           end
         end
+      else
+        score -= 90
       end
     #---------------------------------------------------------------------------
     when "LowerTargetAtkSpAtk1"
@@ -2537,11 +2537,11 @@ class Battle::AI
       end
     #---------------------------------------------------------------------------
     when "LowerTargetSpAtk2", "LowerTargetSpAtk3"
-      if !target.pbCanLowerStatStage?(:SPECIAL_ATTACK, user)
-        score -= 90
-      else
+      if target.pbCanLowerStatStage?(:SPECIAL_ATTACK, user)
         score += 40 if user.turnCount == 0
         score += target.stages[:SPECIAL_ATTACK] * 20
+      else
+        score -= 90
       end
     #---------------------------------------------------------------------------
     when "RaiseGroundedGrassBattlersAtkSpAtk1"
@@ -3005,7 +3005,7 @@ class Battle::AI
           end
           GameData::Stat.each_main_battle { |s| score += 10 if user.stages[s.id] <= 0 }
           if skill >= PBTrainerAI.mediumSkill
-            hasDamagingAttack = user.moves.any? { |m| next m && m.damagingMove? }
+            hasDamagingAttack = user.moves.any? { |m| next m&.damagingMove? }
             score += 20 if hasDamagingAttack
           end
         end
@@ -3031,7 +3031,7 @@ class Battle::AI
           end
           GameData::Stat.each_main_battle { |s| score += 10 if user.stages[s.id] <= 0 }
           if skill >= PBTrainerAI.mediumSkill
-            hasDamagingAttack = user.moves.any? { |m| next m && m.damagingMove? }
+            hasDamagingAttack = user.moves.any? { |m| next m&.damagingMove? }
             score += 20 if hasDamagingAttack
           end
         end
@@ -3064,11 +3064,11 @@ class Battle::AI
       end
     #---------------------------------------------------------------------------
     when "LowerTargetDefense1DoublePowerInGravity"
-      if !target.pbCanLowerStatStage?(:DEFENSE, user)
-        score -= 90
-      else
+      if target.pbCanLowerStatStage?(:DEFENSE, user)
         score += 20
         score += target.stages[:DEFENSE] * 20
+      else
+        score -= 90
       end
       score += 30 if @battle.field.effects[PBEffects::Gravity] > 0
     #---------------------------------------------------------------------------

Data/Scripts/011_Battle/005_AI/006_AI_Move_Utilities.rb

@@ -28,28 +28,29 @@ class Battle::AI
   #=============================================================================
   def pbCalcTypeModSingle(moveType, defType, user, target)
     ret = Effectiveness.calculate_one(moveType, defType)
+    if Effectiveness.ineffective_type?(moveType, defType)
       # Ring Target
       if target.hasActiveItem?(:RINGTARGET)
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if Effectiveness.ineffective_type?(moveType, defType)
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
       end
       # Foresight
-    if user.hasActiveAbility?(:SCRAPPY) || target.effects[PBEffects::Foresight]
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :GHOST &&
-                                                   Effectiveness.ineffective_type?(moveType, defType)
+      if (user.hasActiveAbility?(:SCRAPPY) || target.effects[PBEffects::Foresight]) &&
+         defType == :GHOST
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
       end
       # Miracle Eye
-    if target.effects[PBEffects::MiracleEye]
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :DARK &&
-                                                   Effectiveness.ineffective_type?(moveType, defType)
+      if target.effects[PBEffects::MiracleEye] && defType == :DARK
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
       end
+    elsif Effectiveness.super_effective_type?(moveType, defType)
       # Delta Stream's weather
-    if target.effectiveWeather == :StrongWinds
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :FLYING &&
-                                                   Effectiveness.super_effective_type?(moveType, defType)
+      if target.effectiveWeather == :StrongWinds && defType == :FLYING
+        ret = Effectiveness::NORMAL_EFFECTIVE_ONE
+      end
     end
     # Grounded Flying-type Pokémon become susceptible to Ground moves
-    if !target.airborne?
-      ret = Effectiveness::NORMAL_EFFECTIVE_ONE if defType == :FLYING && moveType == :GROUND
+    if !target.airborne? && defType == :FLYING && moveType == :GROUND
+      ret = Effectiveness::NORMAL_EFFECTIVE_ONE
     end
     return ret
   end
@@ -256,7 +257,7 @@ class Battle::AI
     when "HitOncePerUserTeamMember"   # Beat Up
       mult = 0
       @battle.eachInTeamFromBattlerIndex(user.index) do |pkmn, _i|
-        mult += 1 if pkmn && pkmn.able? && pkmn.status == :NONE
+        mult += 1 if pkmn&.able? && pkmn.status == :NONE
       end
       baseDmg *= mult
     when "TwoTurnAttackOneTurnInSun"   # Solar Beam
@@ -390,26 +391,20 @@ class Battle::AI
         )
       end
     end
-    if skill >= PBTrainerAI.bestSkill && target.itemActive?
-      # NOTE: Type-weakening berries aren't suitable for checking at the start
-      #       of the round.
-      if target.item && !target.item.is_berry?
+    if skill >= PBTrainerAI.bestSkill && target.itemActive? && (target.item && !target.item.is_berry?)
         Battle::ItemEffects.triggerDamageCalcFromTarget(
           target.item, user, target, move, multipliers, baseDmg, type
         )
       end
-    end
     # Global abilities
-    if skill >= PBTrainerAI.mediumSkill
-      if (@battle.pbCheckGlobalAbility(:DARKAURA) && type == :DARK) ||
-         (@battle.pbCheckGlobalAbility(:FAIRYAURA) && type == :FAIRY)
+    if skill >= PBTrainerAI.mediumSkill && ((@battle.pbCheckGlobalAbility(:DARKAURA) && type == :DARK) ||
+         (@battle.pbCheckGlobalAbility(:FAIRYAURA) && type == :FAIRY))
         if @battle.pbCheckGlobalAbility(:AURABREAK)
           multipliers[:base_damage_multiplier] *= 2 / 3.0
         else
           multipliers[:base_damage_multiplier] *= 4 / 3.0
         end
       end
-    end
     # Parental Bond
     if skill >= PBTrainerAI.mediumSkill && user.hasActiveAbility?(:PARENTALBOND)
       multipliers[:base_damage_multiplier] *= 1.25
@@ -418,11 +413,9 @@ class Battle::AI
     # TODO
     # Helping Hand - n/a
     # Charge
-    if skill >= PBTrainerAI.mediumSkill
-      if user.effects[PBEffects::Charge] > 0 && type == :ELECTRIC
+    if skill >= PBTrainerAI.mediumSkill && (user.effects[PBEffects::Charge] > 0 && type == :ELECTRIC)
         multipliers[:base_damage_multiplier] *= 2
       end
-    end
     # Mud Sport and Water Sport
     if skill >= PBTrainerAI.mediumSkill
       if type == :ELECTRIC
@@ -456,25 +449,17 @@ class Battle::AI
       end
     end
     # Badge multipliers
-    if skill >= PBTrainerAI.highSkill
-      if @battle.internalBattle
-        # Don't need to check the Atk/Sp Atk-boosting badges because the AI
-        # won't control the player's Pokémon.
-        if target.pbOwnedByPlayer?
+    if skill >= PBTrainerAI.highSkill && @battle.internalBattle && target.pbOwnedByPlayer?
           if move.physicalMove?(type) && @battle.pbPlayer.badge_count >= Settings::NUM_BADGES_BOOST_DEFENSE
             multipliers[:defense_multiplier] *= 1.1
           elsif move.specialMove?(type) && @battle.pbPlayer.badge_count >= Settings::NUM_BADGES_BOOST_SPDEF
             multipliers[:defense_multiplier] *= 1.1
           end
         end
-      end
-    end
     # Multi-targeting attacks
-    if skill >= PBTrainerAI.highSkill
-      if pbTargetsMultiple?(move, user)
+    if skill >= PBTrainerAI.highSkill && pbTargetsMultiple?(move, user)
         multipliers[:final_damage_multiplier] *= 0.75
       end
-    end
     # Weather
     if skill >= PBTrainerAI.mediumSkill
       case user.effectiveWeather
@@ -502,31 +487,26 @@ class Battle::AI
     # Critical hits - n/a
     # Random variance - n/a
     # STAB
-    if skill >= PBTrainerAI.mediumSkill
-      if type && user.pbHasType?(type)
+    if skill >= PBTrainerAI.mediumSkill && (type && user.pbHasType?(type))
         if user.hasActiveAbility?(:ADAPTABILITY)
           multipliers[:final_damage_multiplier] *= 2
         else
           multipliers[:final_damage_multiplier] *= 1.5
         end
       end
-    end
     # Type effectiveness
     if skill >= PBTrainerAI.mediumSkill
       typemod = pbCalcTypeMod(type, user, target)
       multipliers[:final_damage_multiplier] *= typemod.to_f / Effectiveness::NORMAL_EFFECTIVE
     end
     # Burn
-    if skill >= PBTrainerAI.highSkill
-      if user.status == :BURN && move.physicalMove?(type) &&
+    if skill >= PBTrainerAI.highSkill && (user.status == :BURN && move.physicalMove?(type) &&
          !user.hasActiveAbility?(:GUTS) &&
-         !(Settings::MECHANICS_GENERATION >= 6 && move.function == "DoublePowerIfUserPoisonedBurnedParalyzed")   # Facade
+         !(Settings::MECHANICS_GENERATION >= 6 && move.function == "DoublePowerIfUserPoisonedBurnedParalyzed"))   # Facade
         multipliers[:final_damage_multiplier] /= 2
       end
-    end
     # Aurora Veil, Reflect, Light Screen
-    if skill >= PBTrainerAI.highSkill
-      if !move.ignoresReflect? && !user.hasActiveAbility?(:INFILTRATOR)
+    if skill >= PBTrainerAI.highSkill && (!move.ignoresReflect? && !user.hasActiveAbility?(:INFILTRATOR))
         if target.pbOwnSide.effects[PBEffects::AuroraVeil] > 0
           if @battle.pbSideBattlerCount(target) > 1
             multipliers[:final_damage_multiplier] *= 2 / 3.0
@@ -547,13 +527,10 @@ class Battle::AI
           end
         end
       end
-    end
     # Minimize
-    if skill >= PBTrainerAI.highSkill
-      if target.effects[PBEffects::Minimize] && move.tramplesMinimize?(2)
+    if skill >= PBTrainerAI.highSkill && (target.effects[PBEffects::Minimize] && move.tramplesMinimize?(2))
         multipliers[:final_damage_multiplier] *= 2
       end
-    end
     # Move-specific base damage modifiers
     # TODO
     # Move-specific final damage modifiers
@@ -572,20 +549,16 @@ class Battle::AI
       if c >= 0 && user.abilityActive?
         c = Battle::AbilityEffects.triggerCriticalCalcFromUser(user.ability, user, target, c)
       end
-      if skill >= PBTrainerAI.bestSkill
-        if c >= 0 && !moldBreaker && target.abilityActive?
+      if skill >= PBTrainerAI.bestSkill && (c >= 0 && !moldBreaker && target.abilityActive?)
           c = Battle::AbilityEffects.triggerCriticalCalcFromTarget(target.ability, user, target, c)
         end
-      end
       # Item effects that alter critical hit rate
       if c >= 0 && user.itemActive?
         c = Battle::ItemEffects.triggerCriticalCalcFromUser(user.item, user, target, c)
       end
-      if skill >= PBTrainerAI.bestSkill
-        if c >= 0 && target.itemActive?
+      if skill >= PBTrainerAI.bestSkill && (c >= 0 && target.itemActive?)
           c = Battle::ItemEffects.triggerCriticalCalcFromTarget(target.item, user, target, c)
         end
-      end
       # Other efffects
       c = -1 if target.pbOwnSide.effects[PBEffects::LuckyChant] > 0
       if c >= 0
@@ -659,28 +632,22 @@ class Battle::AI
         )
       end
     end
-    if skill >= PBTrainerAI.bestSkill
-      if target.abilityActive? && !moldBreaker
+    if skill >= PBTrainerAI.bestSkill && (target.abilityActive? && !moldBreaker)
         Battle::AbilityEffects.triggerAccuracyCalcFromTarget(
           target.ability, modifiers, user, target, move, type
         )
       end
-    end
     # Item effects that alter accuracy calculation
-    if skill >= PBTrainerAI.mediumSkill
-      if user.itemActive?
+    if skill >= PBTrainerAI.mediumSkill && user.itemActive?
         Battle::ItemEffects.triggerAccuracyCalcFromUser(
           user.item, modifiers, user, target, move, type
         )
       end
-    end
-    if skill >= PBTrainerAI.bestSkill
-      if target.itemActive?
+    if skill >= PBTrainerAI.bestSkill && target.itemActive?
         Battle::ItemEffects.triggerAccuracyCalcFromTarget(
           target.item, modifiers, user, target, move, type
         )
       end
-    end
     # Other effects, inc. ones that set accuracy_multiplier or evasion_stage to specific values
     if skill >= PBTrainerAI.mediumSkill
       if @battle.field.effects[PBEffects::Gravity] > 0
@@ -699,15 +666,15 @@ class Battle::AI
                                        user.effects[PBEffects::LockOnPos] == target.index
     end
     if skill >= PBTrainerAI.highSkill
-      if move.function == "BadPoisonTarget"   # Toxic
-        modifiers[:base_accuracy] = 0 if Settings::MORE_TYPE_EFFECTS && move.statusMove? &&
-                                         user.pbHasType?(:POISON)
+      if move.function == "BadPoisonTarget" && (Settings::MORE_TYPE_EFFECTS && move.statusMove? &&
+                                         user.pbHasType?(:POISON))   # Toxic
+        modifiers[:base_accuracy] = 0
       end
       if ["OHKO", "OHKOIce", "OHKOHitsUndergroundTarget"].include?(move.function)
         modifiers[:base_accuracy] = move.accuracy + user.level - target.level
         modifiers[:accuracy_multiplier] = 0 if target.level > user.level
-        if skill >= PBTrainerAI.bestSkill
-          modifiers[:accuracy_multiplier] = 0 if target.hasActiveAbility?(:STURDY)
+        if skill >= PBTrainerAI.bestSkill && target.hasActiveAbility?(:STURDY)
+          modifiers[:accuracy_multiplier] = 0
         end
       end
     end

Data/Scripts/011_Battle/006_Other battle code/005_Battle_CatchAndStoreMixin.rb

@@ -4,8 +4,9 @@ module Battle::CatchAndStoreMixin
   #=============================================================================
   def pbStorePokemon(pkmn)
     # Nickname the Pokémon (unless it's a Shadow Pokémon)
-    if !pkmn.shadowPokemon? && $PokemonSystem.givenicknames == 0
-      if pbDisplayConfirm(_INTL("Would you like to give a nickname to {1}?", pkmn.name))
+    if !pkmn.shadowPokemon?
+      if $PokemonSystem.givenicknames == 0 &&
+         pbDisplayConfirm(_INTL("Would you like to give a nickname to {1}?", pkmn.name))
         nickname = @scene.pbNameEntry(_INTL("{1}'s nickname?", pkmn.speciesName), pkmn)
         pkmn.name = nickname
       end
@@ -166,7 +167,7 @@ module Battle::CatchAndStoreMixin
     # Definite capture, no need to perform randomness checks
     return 4 if x >= 255 || Battle::PokeBallEffects.isUnconditional?(ball, self, battler)
     # Second half of the shakes calculation
-    y = (65536 / ((255.0 / x)**0.1875)).floor
+    y = (65_536 / ((255.0 / x)**0.1875)).floor
     # Critical capture check
     if Settings::ENABLE_CRITICAL_CAPTURES
       dex_modifier = 0
@@ -187,7 +188,7 @@ module Battle::CatchAndStoreMixin
       # Calculate the number of shakes
       if c > 0 && pbRandom(256) < c
         @criticalCapture = true
-        return 4 if pbRandom(65536) < y
+        return 4 if pbRandom(65_536) < y
         return 0
       end
     end
@@ -195,7 +196,7 @@ module Battle::CatchAndStoreMixin
     numShakes = 0
     4.times do |i|
       break if numShakes < i
-      numShakes += 1 if pbRandom(65536) < y
+      numShakes += 1 if pbRandom(65_536) < y
     end
     return numShakes
   end

Data/Scripts/011_Battle/006_Other battle code/007_BattleAnimationPlayer.rb

@@ -494,7 +494,7 @@ class PBAnimation < Array
       when 0   # Play SE
         if i.name && i.name != ""
           pbSEPlay("Anim/" + i.name, i.volume, i.pitch)
-        elsif user && user.pokemon
+        elsif user&.pokemon
           name = GameData::Species.cry_filename_from_pokemon(user.pokemon)
           pbSEPlay(name, i.volume, i.pitch) if name
         end
@@ -517,16 +517,16 @@ class PBAnimation < Array
           bgColor.opacity   = i.opacity || 0
         end
       when 2   # Move/recolour background graphic
-        if bgGraphic.bitmap != nil
-          oldbg[0] = bgGraphic.ox || 0
-          oldbg[1] = bgGraphic.oy || 0
-          oldbg[2] = bgGraphic.opacity || 0
-          oldbg[3] = bgGraphic.color.clone || Color.new(0, 0, 0, 0)
-        else
+        if bgGraphic.bitmap.nil?
           oldbg[0] = 0
           oldbg[1] = 0
           oldbg[2] = bgColor.opacity || 0
           oldbg[3] = bgColor.color.clone || Color.new(0, 0, 0, 0)
+        else
+          oldbg[0] = bgGraphic.ox || 0
+          oldbg[1] = bgGraphic.oy || 0
+          oldbg[2] = bgGraphic.opacity || 0
+          oldbg[3] = bgGraphic.color.clone || Color.new(0, 0, 0, 0)
         end
       when 3   # Set foreground graphic (immediate)
         if i.name && i.name != ""
@@ -543,16 +543,16 @@ class PBAnimation < Array
           foColor.opacity   = i.opacity || 0
         end
       when 4   # Move/recolour foreground graphic
-        if foGraphic.bitmap != nil
-          oldfo[0] = foGraphic.ox || 0
-          oldfo[1] = foGraphic.oy || 0
-          oldfo[2] = foGraphic.opacity || 0
-          oldfo[3] = foGraphic.color.clone || Color.new(0, 0, 0, 0)
-        else
+        if foGraphic.bitmap.nil?
           oldfo[0] = 0
           oldfo[1] = 0
           oldfo[2] = foColor.opacity || 0
           oldfo[3] = foColor.color.clone || Color.new(0, 0, 0, 0)
+        else
+          oldfo[0] = foGraphic.ox || 0
+          oldfo[1] = foGraphic.oy || 0
+          oldfo[2] = foGraphic.opacity || 0
+          oldfo[3] = foGraphic.color.clone || Color.new(0, 0, 0, 0)
         end
       end
     end
@@ -562,7 +562,14 @@ class PBAnimation < Array
         next if !i.duration || i.duration <= 0
         next if frame < i.frame || frame > i.frame + i.duration
         fraction = (frame - i.frame).to_f / i.duration
-        if bgGraphic.bitmap != nil
+        if bgGraphic.bitmap.nil?
+          bgColor.opacity   = oldbg[2] + ((i.opacity - oldbg[2]) * fraction) if i.opacity != nil
+          cr = (i.colorRed != nil) ? oldbg[3].red + ((i.colorRed - oldbg[3].red) * fraction) : oldbg[3].red
+          cg = (i.colorGreen != nil) ? oldbg[3].green + ((i.colorGreen - oldbg[3].green) * fraction) : oldbg[3].green
+          cb = (i.colorBlue != nil) ? oldbg[3].blue + ((i.colorBlue - oldbg[3].blue) * fraction) : oldbg[3].blue
+          ca = (i.colorAlpha != nil) ? oldbg[3].alpha + ((i.colorAlpha - oldbg[3].alpha) * fraction) : oldbg[3].alpha
+          bgColor.color     = Color.new(cr, cg, cb, ca)
+        else
           bgGraphic.ox      = oldbg[0] - ((i.bgX - oldbg[0]) * fraction) if i.bgX != nil
           bgGraphic.oy      = oldbg[1] - ((i.bgY - oldbg[1]) * fraction) if i.bgY != nil
           bgGraphic.opacity = oldbg[2] + ((i.opacity - oldbg[2]) * fraction) if i.opacity != nil
@@ -571,19 +578,19 @@ class PBAnimation < Array
           cb = (i.colorBlue != nil) ? oldbg[3].blue + ((i.colorBlue - oldbg[3].blue) * fraction) : oldbg[3].blue
           ca = (i.colorAlpha != nil) ? oldbg[3].alpha + ((i.colorAlpha - oldbg[3].alpha) * fraction) : oldbg[3].alpha
           bgGraphic.color   = Color.new(cr, cg, cb, ca)
-        else
-          bgColor.opacity   = oldbg[2] + ((i.opacity - oldbg[2]) * fraction) if i.opacity != nil
-          cr = (i.colorRed != nil) ? oldbg[3].red + ((i.colorRed - oldbg[3].red) * fraction) : oldbg[3].red
-          cg = (i.colorGreen != nil) ? oldbg[3].green + ((i.colorGreen - oldbg[3].green) * fraction) : oldbg[3].green
-          cb = (i.colorBlue != nil) ? oldbg[3].blue + ((i.colorBlue - oldbg[3].blue) * fraction) : oldbg[3].blue
-          ca = (i.colorAlpha != nil) ? oldbg[3].alpha + ((i.colorAlpha - oldbg[3].alpha) * fraction) : oldbg[3].alpha
-          bgColor.color     = Color.new(cr, cg, cb, ca)
         end
       when 4
         next if !i.duration || i.duration <= 0
         next if frame < i.frame || frame > i.frame + i.duration
         fraction = (frame - i.frame).to_f / i.duration
-        if foGraphic.bitmap != nil
+        if foGraphic.bitmap.nil?
+          foColor.opacity   = oldfo[2] + ((i.opacity - oldfo[2]) * fraction) if i.opacity != nil
+          cr = (i.colorRed != nil) ? oldfo[3].red + ((i.colorRed - oldfo[3].red) * fraction) : oldfo[3].red
+          cg = (i.colorGreen != nil) ? oldfo[3].green + ((i.colorGreen - oldfo[3].green) * fraction) : oldfo[3].green
+          cb = (i.colorBlue != nil) ? oldfo[3].blue + ((i.colorBlue - oldfo[3].blue) * fraction) : oldfo[3].blue
+          ca = (i.colorAlpha != nil) ? oldfo[3].alpha + ((i.colorAlpha - oldfo[3].alpha) * fraction) : oldfo[3].alpha
+          foColor.color = Color.new(cr, cg, cb, ca)
+        else
           foGraphic.ox      = oldfo[0] - ((i.bgX - oldfo[0]) * fraction) if i.bgX != nil
           foGraphic.oy      = oldfo[1] - ((i.bgY - oldfo[1]) * fraction) if i.bgY != nil
           foGraphic.opacity = oldfo[2] + ((i.opacity - oldfo[2]) * fraction) if i.opacity != nil
@@ -592,13 +599,6 @@ class PBAnimation < Array
           cb = (i.colorBlue != nil) ? oldfo[3].blue + ((i.colorBlue - oldfo[3].blue) * fraction) : oldfo[3].blue
           ca = (i.colorAlpha != nil) ? oldfo[3].alpha + ((i.colorAlpha - oldfo[3].alpha) * fraction) : oldfo[3].alpha
           foGraphic.color   = Color.new(cr, cg, cb, ca)
-        else
-          foColor.opacity   = oldfo[2] + ((i.opacity - oldfo[2]) * fraction) if i.opacity != nil
-          cr = (i.colorRed != nil) ? oldfo[3].red + ((i.colorRed - oldfo[3].red) * fraction) : oldfo[3].red
-          cg = (i.colorGreen != nil) ? oldfo[3].green + ((i.colorGreen - oldfo[3].green) * fraction) : oldfo[3].green
-          cb = (i.colorBlue != nil) ? oldfo[3].blue + ((i.colorBlue - oldfo[3].blue) * fraction) : oldfo[3].blue
-          ca = (i.colorAlpha != nil) ? oldfo[3].alpha + ((i.colorAlpha - oldfo[3].alpha) * fraction) : oldfo[3].alpha
-          foColor.color = Color.new(cr, cg, cb, ca)
         end
       end
     end
@@ -700,10 +700,10 @@ class PBAnimationPlayerX
     @user          = (oppMove) ? target : user   # Just used for playing user's cry
     @usersprite    = (user) ? scene.sprites["pokemon_#{user.index}"] : nil
     @targetsprite  = (target) ? scene.sprites["pokemon_#{target.index}"] : nil
-    @userbitmap    = (@usersprite && @usersprite.bitmap) ? @usersprite.bitmap : nil # not to be disposed
-    @targetbitmap  = (@targetsprite && @targetsprite.bitmap) ? @targetsprite.bitmap : nil # not to be disposed
+    @userbitmap    = @usersprite&.bitmap # not to be disposed
+    @targetbitmap  = @targetsprite&.bitmap # not to be disposed
     @scene         = scene
-    @viewport      = (scene) ? scene.viewport : nil
+    @viewport      = scene&.viewport
     @inEditor      = inEditor
     @looping       = false
     @animbitmap    = nil   # Animation sheet graphic
@@ -761,9 +761,9 @@ class PBAnimationPlayerX
   end
 
   def dispose
-    @animbitmap.dispose if @animbitmap
+    @animbitmap&.dispose
     (2...MAX_SPRITES).each do |i|
-      @animsprites[i].dispose if @animsprites[i]
+      @animsprites[i]&.dispose
     end
     @bgGraphic.dispose
     @bgColor.dispose
@@ -792,7 +792,7 @@ class PBAnimationPlayerX
     if animFrame >= @animation.length
       @frame = (@looping) ? 0 : -1
       if @frame < 0
-        @animbitmap.dispose if @animbitmap
+        @animbitmap&.dispose
         @animbitmap = nil
         return
       end

Data/Scripts/011_Battle/006_Other battle code/008_Battle_AbilityEffects.rb

@@ -1179,8 +1179,8 @@ Battle::AbilityEffects::AccuracyCalcFromTarget.add(:UNAWARE,
 
 Battle::AbilityEffects::AccuracyCalcFromTarget.add(:WONDERSKIN,
   proc { |ability, mods, user, target, move, type|
-    if move.statusMove? && user.opposes?(target)
-      mods[:base_accuracy] = 50 if mods[:base_accuracy] > 50
+    if move.statusMove? && user.opposes?(target) && mods[:base_accuracy] > 50
+      mods[:base_accuracy] = 50
     end
   }
 )

Data/Scripts/011_Battle/006_Other battle code/009_Battle_ItemEffects.rb

@@ -1421,12 +1421,11 @@ Battle::ItemEffects::OnBeingHit.add(:STICKYBARB,
     user.item = target.item
     target.item = nil
     target.effects[PBEffects::Unburden] = true if target.hasActiveAbility?(:UNBURDEN)
-    if battle.wildBattle? && !user.opposes?
-      if !user.initialItem && user.item == target.initialItem
+    if battle.wildBattle? && !user.opposes? &&
+       !user.initialItem && user.item == target.initialItem
       user.setInitialItem(user.item)
       target.setInitialItem(nil)
     end
-    end
     battle.pbDisplay(_INTL("{1}'s {2} was transferred to {3}!",
        target.pbThis, user.itemName, user.pbThis(true)))
   }

Data/Scripts/011_Battle/007_Other battle types/001_SafariBattle.rb

@@ -26,7 +26,7 @@ class Battle::FakeBattler
   def super_shiny?;   return @pokemon.super_shiny?; end
 
   def isSpecies?(check_species)
-    return @pokemon && @pokemon.isSpecies?(check_species)
+    return @pokemon&.isSpecies?(check_species)
   end
 
   def fainted?;       return false; end

Data/Scripts/011_Battle/007_Other battle types/003_BattlePalaceBattle.rb

@@ -87,8 +87,9 @@ class BattlePalaceBattle < Battle
       return false
     end
     # though incorrect, just for convenience (actually checks Torment later)
-    if thispkmn.effects[PBEffects::Torment] && thispkmn.lastMoveUsed
-      return false if thismove.id == thispkmn.lastMoveUsed
+    if thispkmn.effects[PBEffects::Torment] &&
+       thispkmn.lastMoveUsed && thismove.id == thispkmn.lastMoveUsed
+      return false
     end
     return true
   end

Data/Scripts/011_Battle/007_Other battle types/004_BattleArenaBattle.rb

@@ -53,9 +53,7 @@ class BattleArenaBattle < Battle
   end
 
   def pbCanSwitchLax?(idxBattler, _idxParty, partyScene = nil)
-    if partyScene
-      partyScene.pbDisplay(_INTL("{1} can't be switched out!", @battlers[idxBattler].pbThis))
-    end
+    partyScene&.pbDisplay(_INTL("{1} can't be switched out!", @battlers[idxBattler].pbThis))
     return false
   end
 
@@ -366,8 +364,8 @@ class Battle::Scene
     ensure
       pbDisposeMessageWindow(msgwindow)
       dimmingvp.dispose
-      infowindow.contents.dispose if infowindow && infowindow.contents
-      infowindow.dispose if infowindow
+      infowindow&.contents&.dispose
+      infowindow&.dispose
     end
   end
 end

Data/Scripts/012_Overworld/001_Overworld visuals/001_Overworld_Weather.rb

@@ -50,14 +50,14 @@ module RPG
     end
 
     def dispose
-      @sprites.each { |sprite| sprite.dispose if sprite }
-      @new_sprites.each { |sprite| sprite.dispose if sprite }
-      @tiles.each { |sprite| sprite.dispose if sprite }
+      @sprites.each { |sprite| sprite&.dispose }
+      @new_sprites.each { |sprite| sprite&.dispose }
+      @tiles.each { |sprite| sprite&.dispose }
       @viewport.dispose
       @weatherTypes.each_value do |weather|
         next if !weather
-        weather[1].each { |bitmap| bitmap.dispose if bitmap }
-        weather[2].each { |bitmap| bitmap.dispose if bitmap }
+        weather[1].each { |bitmap| bitmap&.dispose }
+        weather[2].each { |bitmap| bitmap&.dispose }
       end
     end
 
@@ -83,7 +83,7 @@ module RPG
           @time_shift += 1   # No previous tiles to fade out first
         end
         @fading = true
-        @new_sprites.each { |sprite| sprite.dispose if sprite }
+        @new_sprites.each { |sprite| sprite&.dispose }
         @new_sprites.clear
         ensureSprites
         @new_sprites.each_with_index { |sprite, i| set_sprite_bitmap(sprite, i, @target_type) }
@@ -456,8 +456,8 @@ module RPG
         @new_sprites.each_with_index { |sprite, i| sprite.visible = (i < @new_max) if sprite }
       end
       # End fading
-      if @fade_time >= ((@target_type == :None) ? FADE_OLD_PARTICLES_END : FADE_NEW_TILES_END) - @time_shift
-        if !@sprites.any? { |sprite| sprite.visible }
+      if @fade_time >= ((@target_type == :None) ? FADE_OLD_PARTICLES_END : FADE_NEW_TILES_END) - @time_shift &&
+         !@sprites.any? { |sprite| sprite.visible }
         @type                 = @target_type
         @max                  = @target_max
         @target_type          = nil
@@ -468,7 +468,7 @@ module RPG
         @target_tone          = nil
         @fade_time            = 0.0
         @time_shift           = 0
-          @sprites.each { |sprite| sprite.dispose if sprite }
+        @sprites.each { |sprite| sprite&.dispose }
         @sprites              = @new_sprites
         @new_sprites          = []
         @sprite_lifetimes     = @new_sprite_lifetimes
@@ -476,7 +476,6 @@ module RPG
         @fading               = false
       end
     end
-    end
 
     def update
       update_fading
@@ -501,7 +500,7 @@ module RPG
           update_sprite_position(@sprites[i], i, false)
         end
       elsif @sprites.length > 0
-        @sprites.each { |sprite| sprite.dispose if sprite }
+        @sprites.each { |sprite| sprite&.dispose }
         @sprites.clear
       end
       # Update new weather particles (while fading in only)
@@ -511,7 +510,7 @@ module RPG
           update_sprite_position(@new_sprites[i], i, true)
         end
       elsif @new_sprites.length > 0
-        @new_sprites.each { |sprite| sprite.dispose if sprite }
+        @new_sprites.each { |sprite| sprite&.dispose }
         @new_sprites.clear
       end
       # Update weather tiles (sandstorm/blizzard tiled overlay)
@@ -520,7 +519,7 @@ module RPG
         recalculate_tile_positions
         @tiles.each_with_index { |sprite, i| update_tile_position(sprite, i) }
       elsif @tiles.length > 0
-        @tiles.each { |sprite| sprite.dispose if sprite }
+        @tiles.each { |sprite| sprite&.dispose }
         @tiles.clear
       end
     end

Data/Scripts/012_Overworld/001_Overworld.rb

@@ -47,23 +47,18 @@ def pbBatteryLow?
 end
 
 Events.onMapUpdate += proc { |_sender, _e|
-  if !$game_temp.warned_low_battery && pbBatteryLow?
-    if !$game_temp.in_menu && !$game_temp.in_battle &&
-       !$game_player.move_route_forcing && !$game_temp.message_window_showing &&
-       !pbMapInterpreterRunning?
-      if pbGetTimeNow.sec == 0
+  if !$game_temp.warned_low_battery && pbBatteryLow? &&
+     !$game_temp.in_menu && !$game_temp.in_battle && !$game_player.move_route_forcing &&
+     !$game_temp.message_window_showing && !pbMapInterpreterRunning? &&
+     pbGetTimeNow.sec == 0
     pbMessage(_INTL("The game has detected that the battery is low. You should save soon to avoid losing your progress."))
     $game_temp.warned_low_battery = true
   end
-    end
-  end
   if $game_temp.cue_bgm_frame_delay
     $game_temp.cue_bgm_frame_delay -= 1
     if $game_temp.cue_bgm_frame_delay <= 0
       $game_temp.cue_bgm_frame_delay = nil
-      if $game_system.getPlayingBGM == nil
-        pbBGMPlay($game_temp.cue_bgm)
-      end
+      pbBGMPlay($game_temp.cue_bgm) if $game_system.getPlayingBGM.nil?
     end
   end
 }
@@ -133,7 +128,7 @@ Events.onStepTakenFieldMovement += proc { |_sender, e|
   map = $map_factory.getMap(thistile[0])
   [2, 1, 0].each do |i|
     tile_id = map.data[thistile[1], thistile[2], i]
-    next if tile_id == nil
+    next if tile_id.nil?
     next if GameData::TerrainTag.try_get(map.terrain_tags[tile_id]).id != :SootGrass
     if event == $game_player && $bag.has?(:SOOTSACK)
       old_soot = $player.soot
@@ -229,7 +224,7 @@ Events.onMapChanging += proc { |_sender, e|
   map_infos = pbLoadMapInfos
   if $game_map.name == map_infos[new_map_ID].name
     new_map_metadata = GameData::MapMetadata.try_get(new_map_ID)
-    next if new_map_metadata && new_map_metadata.weather
+    next if new_map_metadata&.weather
   end
   $game_screen.weather(:None, 0, 0)
 }
@@ -238,18 +233,18 @@ Events.onMapChanging += proc { |_sender, e|
 Events.onMapChange += proc { |_sender, e|
   old_map_ID = e[0]   # previous map ID, is 0 if no map ID
   new_map_metadata = $game_map.metadata
-  if new_map_metadata && new_map_metadata.teleport_destination
+  if new_map_metadata&.teleport_destination
     $PokemonGlobal.healingSpot = new_map_metadata.teleport_destination
   end
-  $PokemonMap.clear if $PokemonMap
-  $PokemonEncounters.setup($game_map.map_id) if $PokemonEncounters
+  $PokemonMap&.clear
+  $PokemonEncounters&.setup($game_map.map_id)
   $PokemonGlobal.visitedMaps[$game_map.map_id] = true
   next if old_map_ID == 0 || old_map_ID == $game_map.map_id
   next if !new_map_metadata || !new_map_metadata.weather
   map_infos = pbLoadMapInfos
   if $game_map.name == map_infos[old_map_ID].name
     old_map_metadata = GameData::MapMetadata.try_get(old_map_ID)
-    next if old_map_metadata && old_map_metadata.weather
+    next if old_map_metadata&.weather
   end
   new_weather = new_map_metadata.weather
   $game_screen.weather(new_weather[0], 9, 0) if rand(100) < new_weather[1]
@@ -262,14 +257,14 @@ Events.onMapSceneChange += proc { |_sender, e|
   # Update map trail
   if $game_map
     $PokemonGlobal.mapTrail = [] if !$PokemonGlobal.mapTrail
-    if $PokemonGlobal.mapTrail[0] != $game_map.map_id
-      $PokemonGlobal.mapTrail.pop if $PokemonGlobal.mapTrail.length >= 4
+    if $PokemonGlobal.mapTrail[0] != $game_map.map_id && $PokemonGlobal.mapTrail.length >= 4
+      $PokemonGlobal.mapTrail.pop
     end
     $PokemonGlobal.mapTrail = [$game_map.map_id] + $PokemonGlobal.mapTrail
   end
   # Display darkness circle on dark maps
   map_metadata = $game_map.metadata
-  if map_metadata && map_metadata.dark_map
+  if map_metadata&.dark_map
     $game_temp.darkness_sprite = DarknessSprite.new
     scene.spriteset.addUserSprite($game_temp.darkness_sprite)
     if $PokemonGlobal.flashUsed
@@ -277,7 +272,7 @@ Events.onMapSceneChange += proc { |_sender, e|
     end
   else
     $PokemonGlobal.flashUsed = false
-    $game_temp.darkness_sprite.dispose if $game_temp.darkness_sprite
+    $game_temp.darkness_sprite&.dispose
     $game_temp.darkness_sprite = nil
   end
   # Show location signpost
@@ -298,7 +293,7 @@ Events.onMapSceneChange += proc { |_sender, e|
     scene.spriteset.addUserSprite(LocationWindow.new($game_map.name)) if !nosignpost
   end
   # Force cycling/walking
-  if map_metadata && map_metadata.always_bicycle
+  if map_metadata&.always_bicycle
     pbMountBike
   elsif !pbCanUseBike?($game_map.map_id)
     pbDismountBike
@@ -517,9 +512,7 @@ def pbMoveRoute(event, commands, waitComplete = false)
   end
   route.list.push(RPG::MoveCommand.new(PBMoveRoute::ThroughOff))
   route.list.push(RPG::MoveCommand.new(0))
-  if event
-    event.force_move_route(route)
-  end
+  event&.force_move_route(route)
   return route
 end
 
@@ -610,7 +603,7 @@ def pbMoveTowardPlayer(event)
       pbUpdateSceneMap
     end
   end
-  $PokemonMap.addMovedEvent(event.id) if $PokemonMap
+  $PokemonMap&.addMovedEvent(event.id)
 end
 
 def pbJumpToward(dist = 1, playSound = false, cancelSurf = false)

Data/Scripts/012_Overworld/002_Battle triggering/001_Overworld_BattleStarting.rb

@@ -573,12 +573,10 @@ def pbAfterBattle(decision, canLose)
       pkmn.makeUnprimal
     end
   end
-  if [2, 5].include?(decision)   # if loss or draw
-    if canLose
+  if [2, 5].include?(decision) && canLose   # if loss or draw
     $player.party.each { |pkmn| pkmn.heal }
     (Graphics.frame_rate / 4).times { Graphics.update }
   end
-  end
   Events.onEndBattle.trigger(nil, decision, canLose)
   $game_player.straighten
 end

Data/Scripts/012_Overworld/002_Battle triggering/002_Overworld_BattleIntroAnim.rb

@@ -32,11 +32,11 @@ end
 # Battle intro animation
 #===============================================================================
 def pbSceneStandby
-  $scene.disposeSpritesets if $scene && $scene.is_a?(Scene_Map)
+  $scene.disposeSpritesets if $scene.is_a?(Scene_Map)
   RPG::Cache.clear
   Graphics.frame_reset
   yield
-  $scene.createSpritesets if $scene && $scene.is_a?(Scene_Map)
+  $scene.createSpritesets if $scene.is_a?(Scene_Map)
 end
 
 def pbBattleAnimation(bgm = nil, battletype = 0, foe = nil)
@@ -46,7 +46,7 @@ def pbBattleAnimation(bgm = nil, battletype = 0, foe = nil)
   # Set up audio
   playingBGS = nil
   playingBGM = nil
-  if $game_system && $game_system.is_a?(Game_System)
+  if $game_system.is_a?(Game_System)
     playingBGS = $game_system.getPlayingBGS
     playingBGM = $game_system.getPlayingBGM
     $game_system.bgm_pause
@@ -120,7 +120,7 @@ def pbBattleAnimation(bgm = nil, battletype = 0, foe = nil)
       end
     end
     # Take screenshot of game, for use in some animations
-    $game_temp.background_bitmap.dispose if $game_temp.background_bitmap
+    $game_temp.background_bitmap&.dispose
     $game_temp.background_bitmap = Graphics.snap_to_bitmap
     # Play main animation
     Graphics.freeze
@@ -138,7 +138,7 @@ def pbBattleAnimation(bgm = nil, battletype = 0, foe = nil)
   yield if block_given?
   # After the battle
   pbPopFade
-  if $game_system && $game_system.is_a?(Game_System)
+  if $game_system.is_a?(Game_System)
     $game_system.bgm_resume(playingBGM)
     $game_system.bgs_resume(playingBGS)
   end

Data/Scripts/012_Overworld/002_Battle triggering/003_Overworld_WildEncounters.rb

@@ -281,25 +281,21 @@ class PokemonEncounters
       favored_type = nil
       case first_pkmn.ability_id
       when :FLASHFIRE
-        if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS
-          favored_type = :FIRE if GameData::Type.exists?(:FIRE) && rand(100) < 50
-        end
+        favored_type = :FIRE if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS &&
+                                GameData::Type.exists?(:FIRE) && rand(100) < 50
       when :HARVEST
-        if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS
-          favored_type = :GRASS if GameData::Type.exists?(:GRASS) && rand(100) < 50
-        end
+        favored_type = :GRASS if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS &&
+                                 GameData::Type.exists?(:GRASS) && rand(100) < 50
       when :LIGHTNINGROD
-        if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS
-          favored_type = :ELECTRIC if GameData::Type.exists?(:ELECTRIC) && rand(100) < 50
-        end
+        favored_type = :ELECTRIC if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS &&
+                                    GameData::Type.exists?(:ELECTRIC) && rand(100) < 50
       when :MAGNETPULL
         favored_type = :STEEL if GameData::Type.exists?(:STEEL) && rand(100) < 50
       when :STATIC
         favored_type = :ELECTRIC if GameData::Type.exists?(:ELECTRIC) && rand(100) < 50
       when :STORMDRAIN
-        if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS
-          favored_type = :WATER if GameData::Type.exists?(:WATER) && rand(100) < 50
-        end
+        favored_type = :WATER if Settings::MORE_ABILITIES_AFFECT_WILD_ENCOUNTERS &&
+                                 GameData::Type.exists?(:WATER) && rand(100) < 50
       end
       if favored_type
         new_enc_list = []
@@ -433,7 +429,7 @@ def pbGenerateWildPokemon(species, level, isRoamer = false)
     end
   end
   # Give Pokérus
-  genwildpoke.givePokerus if rand(65536) < Settings::POKERUS_CHANCE
+  genwildpoke.givePokerus if rand(65_536) < Settings::POKERUS_CHANCE
   # Change wild Pokémon's gender/nature depending on the lead party Pokémon's
   # ability
   if first_pkmn

Data/Scripts/012_Overworld/002_Overworld_Metadata.rb

@@ -156,7 +156,7 @@ class PokemonMapMetadata
     @erasedEvents.each do |i|
       if i[0][0] == $game_map.map_id && i[1]
         event = $game_map.events[i[0][1]]
-        event.erase if event
+        event&.erase
       end
     end
     @movedEvents.each do |i|

Data/Scripts/012_Overworld/003_Overworld_Time.rb

@@ -149,9 +149,9 @@ def moonphase(time = nil) # in UTC
   ]
   yy = time.year - ((12 - time.mon) / 10.0).floor
   j = (365.25 * (4712 + yy)).floor + ((((time.mon + 9) % 12) * 30.6) + 0.5).floor + time.day + 59
-  j -= (((yy / 100.0) + 49).floor * 0.75).floor - 38 if j > 2299160
-  j += (((time.hour * 60) + (time.min * 60)) + time.sec) / 86400.0
-  v = (j - 2451550.1) / 29.530588853
+  j -= (((yy / 100.0) + 49).floor * 0.75).floor - 38 if j > 2_299_160
+  j += (((time.hour * 60) + (time.min * 60)) + time.sec) / 86_400.0
+  v = (j - 2_451_550.1) / 29.530588853
   v = ((v - v.floor) + (v < 0 ? 1 : 0))
   ag = v * 29.53
   transitions.length.times do |i|