Fixed not being able to detect a Pokémon being a Mega Evolution, fixed inadequate checking if a Mega Stone is unlosable

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

@@ -421,7 +421,15 @@ class PokeBattle_Battler
     return true if GameData::Item.get(check_item).is_mail?
     return false if @effects[PBEffects::Transform]
     # Items that change a Pokémon's form
-    return true if @pokemon && @pokemon.getMegaForm(true) > 0   # Mega Stone
+    if mega?   # Check if item was needed for this Mega Evolution
+      return true if @pokemon.species_data.mega_stone == check_item
+    else   # Check if item could cause a Mega Evolution
+      GameData::Species.each do |data|
+        next if data.species != @species || data.unmega_form != @form
+        return true if data.mega_stone == check_item
+      end
+    end
+    # Other unlosable items
     return GameData::Item.get(check_item).unlosable?(@species, self.ability)
   end
 

Data/Scripts/011_Battle/003_Battle/009_Battle_Action_Other.rb

@@ -147,7 +147,7 @@ class PokeBattle_Battle
     @scene.pbRefreshOne(idxBattler)
     pbCommonAnimation("MegaEvolution2",battler)
     megaName = battler.pokemon.megaName
-    megaName = _INTL("Mega {1}", battler.pokemon.speciesName) nil_or_empty?(megaName)
+    megaName = _INTL("Mega {1}", battler.pokemon.speciesName) if nil_or_empty?(megaName)
     pbDisplay(_INTL("{1} has Mega Evolved into {2}!",battler.pbThis,megaName))
     side  = battler.idxOwnSide
     owner = pbGetOwnerIndexFromBattlerIndex(idxBattler)

Data/Scripts/014_Pokemon/002_Pokemon_MegaEvolution.rb

@@ -3,14 +3,14 @@ class Pokemon
   # Mega Evolution
   # NOTE: These are treated as form changes in Essentials.
   #=============================================================================
-  def getMegaForm(checkItemOnly = false)
+  def getMegaForm
     ret = 0
     GameData::Species.each do |data|
       next if data.species != @species || data.unmega_form != form_simple
       if data.mega_stone && hasItem?(data.mega_stone)
         ret = data.form
         break
-      elsif !checkItemOnly && data.mega_move && hasMove?(data.mega_move)
+      elsif data.mega_move && hasMove?(data.mega_move)
         ret = data.form
         break
       end
@@ -28,8 +28,7 @@ class Pokemon
   end
 
   def mega?
-    megaForm = self.getMegaForm
+    return (species_data.mega_stone || species_data.mega_move) ? true : false
-    return megaForm > 0 && megaForm == form_simple
   end
 
   def makeMega