Agatha is a member of the Elite Four in Generation I and its remakes, who uses Ghost-typePokémon. She was Professor Oak's rival when they were young. She also makes an appearance in the anime, where she battles Ash while she is the temporary Gym Leader until someone could be found.
Agatha appeared in the anime series episode 406: Scheme Team. She was seen in Viridian City where Scott invites Ash to Battle Frontier. She battled Ash and won using her Gengar against Ash's Pikachu.
Gengar is Agatha's main Pokémon, and was able to hold its own against Ash Ketchum's Pikachu. However, Pikachu was able to defeat its Double Team attack, moving in for the win with Thundershock. But Agatha instructed Gengar to use Hypnosis and Dream Eater in succession, enabling it to defeat Pikachu. Its known moves are Hypnosis, Dream Eater, Double Team and Shadow Ball.
Golbat
Golbat is used by Agatha to rescue Ash's Pikachu from Team Rocket's clutches by using Air Cutter and Supersonic, subsequently sending them blasting off. Its known moves are Air Cutter and Supersonic.