Squirtle is notably different compared to his anime counterpart due to the mistreatment he experienced with his previous Trainer. Though gruff, he isn't bitter. He's a fighter and packs a punch, being the only one of Ash's Pokémon to successfully weaken the giant Tentacruel in What Even Is?. Despite these flaws, Squirtle cares for his comrades above all else.
As a member of the Squirtle Squad, he was serious in capturing any Pokémon thieves, but did show concern when he noticed Gabby was hurt.