About
Pokémon Colosseum is a 2003 GameCube spin-off role-playing game by Genius Sonority in which players 'snag' other trainers' Pokémon rather than encountering them randomly, with both single-player and multiplayer battle modes. This tool builds the Pokémon Colosseum multiboot image, the small program bundled inside Pokémon FireRed, LeafGreen, and Emerald that lets a Game Boy Advance connect to a GameCube copy of Pokémon Colosseum over a link cable. It produces two image variants: one for the base ROM set and one for FireRed/LeafGreen.