Win the first cup in Obstacle Course to unlock Dark Globox.
Win the first circuit in Total Fight to unlock Henchman 1000.
Win the first circuit in Freeze Combat to unlock Mrs. Razorbeard.
Win the first circuit in Time Attack to unlock Tily.
Successfully complete the cups in single player mode to unlock new skins.
Successfully complete the Beginner and Pro levels in all single player game modes to unlock new special levels in exhibition mode.
When racing, avoid the green slime as it slows you down. Always use the walkways when available.