Squirtle

Squirtle is a Water type Pokemon introduced in Generation I. Along with Charmander and Bulbasaur, Squirtle can be chosen for the player's starting journey in the Kanto region.

Squirtle is one of the three Pokemon that the player can choose in Pokémon X and Y if the player beats Professor Sycamore in Lumiose City; the others being Charmander and Bulbasaur.

Smash Bros.
Squirtle is a playable character if you use the Pokemon Trainer. It can change to Charizard or Ivysaur if it's Down Special Move, Pokemon Change, is used.