Pokémon Colosseum is a role-playing video game developed by Genius Sonority and published by Nintendo and The Pokémon Company for the Nintendo GameCube. Released in Japan in 2003 and in North America and Europe in 2004, it marked a significant departure from the main series games that typically appeared on handheld consoles.
Players take on the role of Wes, a former member of the villainous Team Snagem. The storyline revolves around Wes trying to thwart the plans of the evil organization Cipher, which has created Shadow Pokémon—Pokémon whose hearts have been artificially closed off, making them into fighting machines.
Gameplay Mechanics: