Explore stunning new circuits including Sonic Seaside Hill, Curien Mansion and Blizzard Castle as you zip around medieval castle ramparts, hurtle under lush rainforest canopies and tear through bustling city scapes. Jostle against 20 challengers including Super Monkey Ball's AiAi, Amigo from Samba and the evil Dr. Egg man in your unique character vehicle. Stay ahead of the pack by dodging traps and launching outrageous character moves such as the invincible Super Sonic or the Banana Blitz assault of monkey balls!