Pokémon Colosseum (Pokemon Koroshiamu?) is an adventure-RPG video game in the Pokémon series, developed by Genius Sonority and The Pokémon Company, published by Nintendo and released for GameCube on November 21, 2003 in Japan, March 22, 2004 in America North and May 14, 2004 in Europe.
This is the first Pokémon game of its kind on a home console, marked by its dark atmosphere and its more mature storyline. It will be followed a year later on the same console by Pokémon XD: Breath of Darkness.
