Changing the player's character or outfit immediately updates the player's graphic again

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

@@ -77,6 +77,23 @@ class Game_Player < Game_Character
     @character_name = new_charset if new_charset
   end
 
+  # Called when the player's character or outfit changes. Assumes the player
+  # isn't moving.
+  def refresh_charset
+    meta = GameData::PlayerMetadata.get($player&.character_ID || 1)
+    new_charset = nil
+    if $PokemonGlobal&.diving
+      new_charset = pbGetPlayerCharset(meta.dive_charset)
+    elsif $PokemonGlobal&.surfing
+      new_charset = pbGetPlayerCharset(meta.surf_charset)
+    elsif $PokemonGlobal&.bicycle
+      new_charset = pbGetPlayerCharset(meta.cycle_charset)
+    else
+      new_charset = pbGetPlayerCharset(meta.walk_charset)
+    end
+    @character_name = new_charset if new_charset
+  end
+
   def bump_into_object
     return if @bump_se && @bump_se>0
     pbSEPlay("Player bump")
@@ -498,7 +515,7 @@ def pbGetPlayerCharset(charset, trainer = nil, force = false)
                   $game_player.charsetData[1] == charset &&
                   $game_player.charsetData[2] == outfit
   end
-  $game_player.charsetData = [trainer.character_ID, charset,outfit] if $game_player
+  $game_player.charsetData = [trainer.character_ID, charset, outfit] if $game_player
   ret = charset
   if pbResolveBitmap("Graphics/Characters/"+ret+"_"+outfit.to_s)
     ret = ret+"_"+outfit.to_s

Data/Scripts/015_Trainers and player/004_Player.rb

@@ -3,9 +3,9 @@
 #===============================================================================
 class Player < Trainer
   # @return [Integer] the character ID of the player
-  attr_accessor :character_ID
+  attr_reader   :character_ID
   # @return [Integer] the player's outfit
-  attr_accessor :outfit
+  attr_reader   :outfit
   # @return [Array<Boolean>] the player's Gym Badges (true if owned)
   attr_accessor :badges
   # @return [Integer] the player's money
@@ -31,11 +31,20 @@ class Player < Trainer
   # @return [Array<Array>] downloaded Mystery Gift data
   attr_accessor :mystery_gifts
 
+  def character_ID=(value)
+    return if @character_ID == value
+    @character_ID = value
+    $game_player.refresh_charset if $game_player
+  end
+
+  def outfit=(value)
+    return if @outfit == value
+    @outfit = value
+    $game_player.refresh_charset if $game_player
+  end
+
   def trainer_type
-    if @trainer_type.is_a?(Integer)
+    return GameData::PlayerMetadata.get(@character_ID || 1).trainer_type
-      @trainer_type = GameData::PlayerMetadata.get(@character_ID || 1).trainer_type
-    end
-    return @trainer_type
   end
 
   # Sets the player's money. It can not exceed {Settings::MAX_MONEY}.

Data/Scripts/019_Utilities/001_Utilities.rb

@@ -224,8 +224,6 @@ def pbChangePlayer(id)
   meta = GameData::PlayerMetadata.get(id)
   return false if !meta
   $player.character_ID = id
-  $player.trainer_type = meta.trainer_type
-  $game_player.character_name = meta.walk_charset
 end
 
 def pbTrainerName(name = nil, outfit = 0)