New two-player "Battle? mode featuring action racing, treasure hunting, shooting, kart racing, Chao racing, and the comical new Chao karate.
12 playable characters -- Six hero and dark characters plus six others from the Sonic series, including Amy Rose, Metal Sonic, and Chaos Zero.
Cable Link with Game Boy Advance -- Raise and train your Chao on the go!
Single-player Adventure mode lets you try to save the world as Sonic and friends, or conquer it as Shadow, Rouge, and Dr. Robotnik.
New Moves -- Grind down rails, grab ledges, and swing from poles.
More than action 30 Stages and 150 missions. Can you collect all 180 emblems?