Taking a cue from Mario, Sonic and friends take on Robotnik on go carts. You get your choice of four characters: Sonic, Tails, Amy (from the Japanese CD), and the evil Doctor himself. Each cart has different performance specs like dash and jump. There are 18 courses in all. The best times for each course are recorded so time trials should be exciting. Useful items can be scooped up and used to gain the lead. Besides the cool GP Mode against the computer, there's also a Free Run where two players can go up against each other. It's quite possible that the cart might come here.