Shauna first appeared to challenge Ash Ketchum after she heard about him losing to Brawly, her mentor. She fought with her Meditite against Ash's Pikachu and ended up losing. She told Ash and his friends that she was the apprentice and girlfriend of Brawly which they found out later wasn't true after May asked her about it in front of him. Shauna felt really sorry about lying but Brawly forgave her.
Shauna judged Ash's rematch against Brawly in Just One of the Geysers.