From Bulbapedia, the community-driven Pokémon encyclopedia.
The GR Fighting Fort (Japanese: 闘のGR団のトリデ GR Team Compete Toride) is a location found in Pokémon Card GB2: Here Comes Team GR!. Every TCG player in GR Fighting Fort focuses on -type Pokémon cards. Unlike other Forts, which have a side room and series of consequent rooms, GR Fighting Fort has a main room, a cellar room and a maze.
Club Master Mitch is imprisoned in one of the maze rooms, but Gōda frees him after being defeated by the player. Other members of GR Fighting Fort include Grace and Kamiya, the Fort Leader. Upon defeating Kamiya, the player is awarded with the GR Fighting Coin.