>>49963914Bulbasaur's was explained because he was scared of losing his personality like Charmander did when he became Charmeleon, so he refused. Squirtle was always based on a pact theory he made with Bulbasaur about not evolving and becoming like Charmeleon or that he was traumatized by Blastoise.
In reality it was because Charizard was easier to market than Venusaur and Blastoise.
