The EX World Grand Prix is an Extreme Gear tournament created by Dr. Eggman in Sonic Riders. Eggman orchestrates the competition as a means of having his enemies help him in uncovering the Babylon Garden.
By ensuring the Babylon Rogues' participation and charging each contestant a Chaos Emerald as the price of admission, Eggman successfully manages to bring the emeralds into proximity with Jet the Hawk's ancient family heirloom: a cubic control key for the Babylon Garden. After Jet wins the tournament due to Wave destroying Sonic's Extreme Gear, the Emeralds activate the cube and Babylon Garden rises up from beneath the dunes of Sand Ruins.
Courses in the EX World Grand Prix include: