Turned fusion items into two separate items for the sake of them having different descriptions, fixed ability-changing items not doing so, added Zygarde Cube's Gen 8 effect

Data/Scripts/011_Battle/004_BattleHandlers_Items.rb

@@ -1183,6 +1183,7 @@ BattleHandlers::TargetItemOnHit.add(:WEAKNESSPOLICY,
     if target.pbCanRaiseStatStage?(:SPECIAL_ATTACK,target)
       target.pbRaiseStatStageByCause(:SPECIAL_ATTACK,2,target,target.itemName,showAnim)
     end
+    battle.pbDisplay(_INTL("The {1} was used up...", target.itemName))
     target.pbHeldItemTriggered(item)
   }
 )