Pokemon Colosseum - If you've conquered the Pokemon Stadium games, then the next step up is winning in the massive Colosseums! In this game, you'll be challenged to retrain and convert the infamous "Dark Pokemon". These are Pokemon that were mistreated during training. Open their hearts through kindness & training, then battle them against champion trainers in the Colosseums!  Work with Dark Pokemon to develop a strong relationship with them -- open its heart so that it'll fight for you in the Colosseum!