In Pokémon Colosseum, the Cipher admin Miror B. is behind a secret operation handing out Shadow Pokémon to winners of the tournament. Wes enters and wins the tournament in order to infiltrate Miror B.'s Hideout. After defeating Miror B., the Colosseum returns to normal operation under Duking.
Story Mode
All Story Mode Colosseum challenges are conducted in double battle format.
Defeat all of the Trainers to earn $7020 and TM31 (Brick Break).
Pokémon XD
In Pokémon XD, Pyrite Colosseum is one of the locations where a Shadow Pokémon can be snagged from Miror B.. There is also a knockout challenge in Pyrite Colosseum.