" The Battle of the Badge " (Season 1, Episode 63) is a major milestone in the Pokémon series, marking the moment Ash Ketchum secures his eighth Kanto gym badge to qualify for the Indigo League. This episode is widely remembered for debuting the mysterious Mewtwo in the anime and featuring a rare battle where Team Rocket takes over as temporary Gym Leaders.
: The battle is not fair; the gym platforms are rigged to deliver electric shocks to the Trainers whenever their Pokémon take damage. Despite the pain, Ash's determination leads him to victory with the help of Squirtle, Bulbasaur, and Pikachu. 63 : The Battle of the Badge
: Before Ash can challenge the gym, his rival Gary Oak enters and faces the Gym Leader, Giovanni. Despite Gary's skill, Giovanni unveils a powerful, never-before-seen armored Pokémon—Mewtwo—who effortlessly defeats Gary's Arcanine and Nidoking. " The Battle of the Badge " (Season