[Scripting Question] Tri-Splicers Help

[HeroesFightingFear]

I am trying to create an item like the DNA Splicers that takes three Pokemon, using Lucario as a base, Mewtwo as the second Pokemon, and Alakazam as the new third Pokemon variable. When this item is used, it sets Lucario into a new second form, an alternative to its Mega.

Here is the item in the PBS File.

Spoiler:

803,TRISPLICERS,Tri-Splicers,Tri-Splicers,8,0,"A splicer capable of fusing three Pokémon. It is said the fusion will bring great power.",5,0,6,

 

[HeroesFightingFear]

Alright, I tried my hand at coding it. Let me know if this looks alright.

ItemHandlers::UseOnPokemon.add(:TRISPLICERS,proc { |item,pkmn,scene|
  if !pkmn.isSpecies?(:LUCARIO)
    scene.pbDisplay(_INTL("It had no effect."))
    next false
  end
  if pkmn.fainted?
    scene.pbDisplay(_INTL("This can't be used on the fainted Pokémon."))
  end
  # Fusing
  if pkmn.fused==nil
    chosen = scene.pbChoosePokemon(_INTL("Fuse with which Pokémon?"))
    next false if chosen<0
    poke2 = $Trainer.party[chosen]
    poke3 = $Trainer.party[chosen]
    if pkmn==poke2 || pkmn==poke3
      scene.pbDisplay(_INTL("It cannot be fused with itself."))
    elsif poke2.egg? || poke3.egg?
      scene.pbDisplay(_INTL("It cannot be fused with an Egg."))
    elsif poke2.fainted? || poke3.fainted?
      scene.pbDisplay(_INTL("It cannot be fused with a fainted Pokémon."))
    elsif !poke2.isSpecies?(:MEWTWO) &&
          !poke3.isSpecies?(:ALAKAZAM)
      scene.pbDisplay(_INTL("It cannot be fused with those Pokémon."))
    end
    newForm = 0
    newForm = 2 if poke2.isSpecies?(:MEWTWO) && poke3.isSpecies?(:ALAKAZAM)
    pkmn.setForm(newForm) {
      pkmn.fused = poke2 && pkmn.fused = poke3
      pbRemovePokemonAt(chosen)
      scene.pbHardRefresh
      scene.pbDisplay(_INTL("{1} changed Forme!",pkmn.name))
    }
    next true
  end
  # Unfusing
  if $Trainer.party.length>=6
    scene.pbDisplay(_INTL("You have no room to separate the Pokémon."))
    next false
  end
  pkmn.setForm(0) {
    $Trainer.party[$Trainer.party.length] = pkmn.fused
    pkmn.fused = nil
    scene.pbHardRefresh
    scene.pbDisplay(_INTL("{1} changed Forme!",pkmn.name))
  }
  next true
})