A Mt BtlMaster or Mt.BtlMaster (Japanese: バトル山マスター Mt. Battle Master) is a type of Pokémon Trainer that first debuted in the Generation III games, appearing in Pokémon Colosseum and XD. It refers to the Area Leader of all of Mt. Battle, essentially Orre's equivalent to Pokémon Champions. They all reside in Mt. Battle Area 10.
In the Story Modes of Colosseum and XD, Mt BtlMasters are depicted as muscular men, resembling Bodybuilders, while in the Battle Mode of Colosseum, they share their design with that of Myth Trainers.