Pokemon - episode 22 - 25 Aug, 1997

The party finally arrives in Saffron City where a young girl manages a gym of Pokémon using her psychic powers. If Ash defeats this particular Gym Leader, Ash can earn a gold badge. Gathering all their strength, Ash and Pikachu challenge her. She happily accepts, but adds the strange condition that if Ash loses, they must become her friend. The official gym battle begins, but Pikachu is helpless against the young girl's Pokémon, Abra. To make matters worse, Abra evolves in the middle of the match, turning into the more powerful, Kadabra. Employing even stronger psychic powers against Pikachu, Saffron City's Gym Leader defeats Ash. As this strange story unravels, Ash encounters a mysterious man who seems to be the key to solving the puzzle to this young girl's disturbing power. (Source: Official site)