[SOLVED] Custom evolution method shows 'Unable' in party menu despite working correctly

[Blanco_9]

I made a variation of the "item" evolution method to evolve Pokémon into different forms, like Dewott into Hisuian Samurott or Ursaring into Bloodmoon Ursaluna, using a specific item.
However, there's a small problem: when you try to use the item on the Pokémon in the party, it says "Unable," even though if you select the Pokémon, the evolution proceeds normally into the alternate form.
Any idea how to fix this?

Here is the code:

GameData::Evolution.register({
  :id            => :UseItemForm,
  :parameter     => :Item,
  :use_item_proc => proc { |pkmn, item, parameter|
    next false unless item == parameter
    pkmn.form = 1
    next true
  }
})

 

[Willøw]

here, i've made something similar to get rid of trade evos and region exclusive, try this, just change the ID to your Method Name

GameData::Evolution.register({
  :id            => :ItemForm,
  :parameter     => :Item,
  :use_item_proc => proc { |pkmn, parameter, item|
    if item == parameter
        pkmn.form = 1
        next true
    else
        next false
    end
  }
})

 

[Blanco_9]

It works, thanks.