Mikey's Eevee is the only Pokemon Mikey owns. Mikey doesn't want to evolve him and keeps his secret from his brother. When his Eevee and other Pokemon are stolen by Team Rocket, Mikey, his brothers, and the rest of the trainers rescue the Pokemon and Mikey has his first battle with Eevee who blasts off Team Rocket. Mikey admits to his brothers that he doesn't want to evolve his Eevee, he likes his Eevee the way he is and doesn't want to change him.