[Scripting Question] Johto and Kanto Pokedex

Hello,
I've been trying to add a new Pokedex to my game, for example I would like to have Kanto's Pokedex and later I receive the Johto Pokedex from Oak's Aide. All I found so far is this script(found below), but I couldn't find a way to have the Aide to give me that new Pokedex.

Other than that, when I debug the other Pokedex I can't seem to toggle between the two Pokedex.

Can anyone help me?

DEXDEPENDSONLOCATION = false
def pbDexNames; return [
[_INTL("Kanto Pokédex"),0],
[_INTL("Johto Pokédex"),1],
_INTL("National Pokédex")
]; end
ALWAYSSHOWALLFORMS = false
DEXINDEXOFFSETS = []