Blastoise

Blastoise is one of iconic pok'emon, along with its famous rival: Charizard, from the first generation. It evolves from Wartortle that evolves from Squirtle.

In Anime
The Famed Blastoise is Gary Oak's Blastoise, meaning Gary started out with Squirtle (Which Ash was originally supposed to start out with before he got Pikachu).