[Scripting Question] Battle Bond ability isn't working

I've copied the scripts for Ash-Greninja from M3rein's Gen 7 scripts thread and Battle Bond now exists as an ability, but it never triggers when I faint an opponent's Pok?mon, even though the form does exist. In my game I edited it into Ash-Pikachu which is why the code has its name in it. I'm also using Pok?mon Essentials BW by KleinStudio.

Here's my code in Pokemon_MultipleForms under the Mega Evolutions, I don't know what I did wrong or how I can get Battle Bond to activate.

MultipleForms.register(:PIKACHU,{
"getMegaForm"=>proc{|pokemon|
next 1 if isConst?(user.species,PBSpecies,:PIKACHU) && user.hasWorkingAbility(:BATTLEBOND)
next
},
"getUnmegaForm"=>proc{|pokemon|
next 0
},
"getMegaName"=>proc{|pokemon|
next _INTL("Ash-Pikachu") if pokemon.form==1
next
},
"getBaseStats"=>proc{|pokemon|
next [35,85,30,100,80,40] if pokemon.form==1
next
},
"onSetForm"=>proc{|pokemon,form|
pbSeenForm(pokemon)
}
})

Click to expand...

user and hasWorkingAbility are variables and methods for battlers, not pokemon.
You also don't need the check for the species because the multiple form requires the species already.
hasAbility? does the same thing but for pokemon.