Choose a generation pack. It includes all the pokemon per generation number. If you buy a generation 1 pack - you get all pokemon disguises from it.

/pokedisguise  list - check which generation packs you have purchased. And you can click on each one and look thru all the available disguises

/pokedisguise \ - to get the pokemon you want to be disguised as

/pokedisguise off removes it

/pokedisguise view enables and disables if you yourself want to look like a pokemon or not (other people will still see you as a pokemon)