Pocket Monsters Emerald: Chousen!! Battle Frontier  

Pokemon Battle Frontier, Pocket Monsters: Battle Frontier, Pocket Monsters Emerald: Challenge!! Battle Frontier, Pokemon Emerald: Challenge!! Battle Frontier, ポケットモンスターエメラルド 挑戦!! バトルフロンティア

A boy named Enta is invited to come to the Battle Frontier by Scott. Once there, Enta decides to battle each of the Frontier Brains.

Pocket Monsters Emerald: Chousen!! Battle Frontier was published in English as Pokémon Battle Frontier by Chuang Yi Publishing on April 2007.