>>17748181Not a bad idea, but probably not totally feasible without some changes.
Fire - 3rd Evo, Charizard. Special Moves: Flamethrower, Rock Smash, Fly
Problems here is mostly Fly. Rock Smash could have variable name, but same hitbox and graphics, and flamethrower is a given, but Fly needs work.
Grass - 2nd Evo, Ivysaur. Special Moves: Bullet Seed, Razor Leaf, Vine Whip
Problems don't seem as bad here. I'm not sure if all the grass starters learn Vine Whip though. The main issue though would be size. Ivysaur's general build works well with Grotle and Quilladin, sorta, but not at all for the others. Especially Servine.
Water - No Evo, Squirtle. Special Moves: Water Gun, Withdraw, Waterfall
Only real issue is Withdraw. No other Water Starter really has a shell to withdraw into.
It's a neat idea but they'd require brand new movesets to be interchangeable, and the non-standard designs of some throw it off big time. Mostly the Snivy Line which, even if you agreed to mix-and-match evos and typings (using similar moves for variable typings of an evo), Snivy's line doesn't fit the body build of any other mon.