Pokémon Colosseum is a role-playing video game developed by Genius Sonority, published by The Pokémon Company and distributed by Nintendo as part of the Pokémon series.

The game is set in the desertous region of Orre. The player protagonist is Wes, a former member of Team Snagem. Throughout the game, the player rescues "Shadow Pokémon"—Pokémon who have had their hearts darkened by Team Cipher, an antagonistic organization—via snagging. Rui, a non-player character, serves as Wes's sidekick and identifies Shadow Pokémon.