Pokemon Season 1 Episode 40 - The Battling Eevee Brothers

⁣While traveling through the woods, the group encounters an Eevee that
was apparently abandoned by a tree. They take it to its address in Stone
Town and find it belongs to a little boy. All the Pokémon at the
Evolution Party gets stolen by Team Rocket. They are eventually defeat
by Mikey and Eevee who saved his 3 brothers and their Jolteon, Flareon
and Vaporeon.