Lostelle is a little girl who lives on Three Island. Her father runs the Game Corner on Two Island, while her uncle runs the shop outside. She brings lunch to her father often. She likes to travel to the Berry Forest and pick Berries.
Lostelle appears in Pokémon FireRed and LeafGreen on the Sevii Islands. The player must rescue her from a wild Hypno and return her back to her father in order to progress with the plot. She will thank the player from rescuing her by giving them an Iapapa Berry.