What if Entertainment is wrong as the trio design bases and they are based on anime... See pic.

Scorbunny Fire/Electric "cool" Hare that could be inspired by bugs bunny.

Grookey Grass/Fighting feminine proto-primape with also a design that uses an anime staff user.

Sobble Water/Psychic Whip tongue chameleon

I will add a more detailed description of what I think they may end up being based on below.