[Scripting Question] Help with Evolution on Faint Method

[SJFzone]

I had an idea to evolve Vaporeon, Jolteon, and Flareon when their HP reached 0 if they had a certain level of happiness while a Ho-Oh was in the party, as a reference to the fan theory that the legendary beasts evolved from them. I got most of the way there, but stumbled on the fact that the only triggers for evolution in the game are based on level up, item, or trade. I tried having them evolve with the Revival Herb, but that always revived the pokemon without evolving them, prioritizing the item's core function, so that doesn't work. As for level up methods, the closest I got was using the code at the bottom of this post, but pokemon don't gain exp in battle if they are fainted, so that wouldn't work out. I'd rather not make it a requirement to use a Rare Candy to evolve them, and besides, they can technically evolve without fainting this way, so it'd be pointless.

The problem is, I can't find where pbMiniCheckEvolution, pb MiniCheckEvolutionItem, PBEvolution, or whatever command, actually triggers upon level up or item use. Does anyone know where I can find this, so I can create a new check for when HP reaches zero? (pbMiniCheckEvolutionFaint or something.) Any help would be appreciated!

when PBEvolution::HasInPartyFaint #Legendary Dogs
return poke if pokemon.hp<=5 && pokemon.happiness>=220

(the reason the hp value is set to 5 is because on level up the pokemon's health increases and it no longer is 0, and 5 is the highest it would change by for the eeveelutions. I would probably remove this if I can get the faint trigger working.)

 

[SJFzone]

For anyone reading this later, this has been resolved thanks to NettoHikari on Relic Castle, they wrote this code. Here's how it works (Compatible with 17.2):

1. Go into PField_Battles and replace the definition for pbEvolution check so that it instead looks like this (This removes a line that prevents pokemon from evolving if they faint and allows them to do so):

def pbEvolutionCheck(currentlevels)
  for i in 0...currentlevels.length
    pokemon = $Trainer.party[i]
    newspecies = Kernel.pbCheckEvolution(pokemon,0,true)
    if pokemon && (!currentlevels[i] || pokemon.level!=currentlevels[i])
      newspecies = Kernel.pbCheckEvolution(pokemon) if newspecies <= 0
    end
    if newspecies>0
      evo = PokemonEvolutionScene.new
      evo.pbStartScreen(pokemon,newspecies)
      evo.pbEvolution
      evo.pbEndScreen
    end
  end
end

2. Then, go into Pokemon_Evolution and replace the definition for pbCheckEvolution with this:

def pbCheckEvolution(pokemon,item=0,faint=false)
  if faint
    return pbCheckEvolutionEx(pokemon){|pokemon,evonib,level,poke|
       next pbMiniCheckEvolutionFaint(pokemon,evonib,level,poke)
    }
  elsif item==0
    return pbCheckEvolutionEx(pokemon){|pokemon,evonib,level,poke|
       next pbMiniCheckEvolution(pokemon,evonib,level,poke)
    }
  else
    return pbCheckEvolutionEx(pokemon){|pokemon,evonib,level,poke|
       next pbMiniCheckEvolutionItem(pokemon,evonib,level,poke,item)
    }
  end
end

3. Finally, put in the pbMiniCheckEvolutionFaint with the rest of the MiniCheckEvolution scripts.

def pbMiniCheckEvolutionFaint(pokemon,evonib,level,poke)
  case evonib
  when PBEvolution::HasInPartyFaint
    return poke if pokemon.hp == 0
  end
  return -1
end

If anyone has any problems using this, let me know!