Emerald's Xatu, nicknamed Mystique is his 8th caught Pokémon in Johto and his 34th caught Pokémon overall. She was found by him when he and his party were exploring the Alph Ruins. She helped Emerald win the Storm Badge after defeated Chuck's Poliwrath in her evolved form, Xatu. She also helped fight against the Pokemon Poachers and their various Poison-type Pokemon as she, Emerald, and the party stormed their hideout.