Brainwashed by Dr. Eggman to collect Chaos emeralds, it soon turns rogue and collects the emeralds for itself. It has essentially the same material from Sonic Adventure 2 for the Dreamcast released in 2001. Sonic Adventure 2 features the world-famous blue hedgehog in a hyper-fast adventure where players can either save the world or conquer it in an action-packed showdown between Hero and Dark characters! He appears as a playable multiplayer character in Sonic Adventure 2 as "Chaos Zero". It has a Chao Garden where the player can raise and train chaos (small blob-like creatures) to race and fight karate. {DUPLICATE = SEE "Sonic Adventure 2 Battle"} Sonic Adventure 2 at IGN: walkthroughs, items, maps, video tips, and strategies Features Sonic Adventure 2: Battle has the new battle option in multi-player mode. Chaos, the Keeper of the Chao, is a principle villian in Sonic Adventure. GameCube - Sonic Adventure 2: Battle - The #1 source for video game models on the internet! Sonic Adventure 2: Battle was a game that came out on Ferbuary 12th 2002 for the Gamecube.