The Battle Frontier (Japanese: バトルフロンティア Battle Frontier) is the main form of Pokémon battling within the confines of Mahima Island. It is accessible once players of Pokémon Aether, Nether, and Tether Versions manage to defeat Volundr and acquire the Skill Badge, unlike previous incarnations in which the Battle Frontier can be only accessed after the player has completed the Pokémon League. Like the previous versions, however, it consists a variety of arenas in which Pokémon Trainers of great strength can battle each other. Similar to the anime, the Battle Frontier is spread out throughout the island, or rather, the Battle Frontier makes up the majority of Mahima, with most residents living around the various facilities, and most automated transport connecting the various arenas rather tha