The World Grand Prix, also referred to as the EX World Grand Prix, is an Extreme Gear tournament hosted by Dr. Eggman in Sonic Riders and Sonic Free Riders. It is a competition for Extreme Gear riders around the world to race against each other to see who is the fastest on Extreme Gear. They are mainly involved in the storylines of these two games.
While the storyline of Sonic Riders: Zero Gravity did not take place in a World Grand Prix, it was mentioned, in Team Heroes' Story mode, by Sonic saying that he will see Jet at the next World Grand Prix.
In Normal Race, there is a gameplay mode entitled "World Grand Prix" in which where one or two player(s) race through six courses of the two teams' storyline (Heroes Cup and Babylon Cup). Each competitor earns points after each race which is based on the racing position they finished in; a higher placing results in higher points. At the end of the World Grand Prix mode; the player(s) are awarded a bonus amount of Rings based on their overall position of the tournament.
Sonic Free Riders
The World Grand Prix returns in Sonic Free Riders, serving as the main setting of the game's plot. Instead of just two teams, Eggman pits twomore teams in this World Grand Prix tournament. While the competitors settle their old rivalries and/or disputes by racing all along with each other, Eggman's motives in the tournament is to capture the racing data of all of the competitors to create the "fastest Extreme Gear" using Team Dark's new member, E-10000B. However, when Eggman races against the competitors on this Gear, the doctor loses, claiming that the data "didn't help him at the slightest" and E-10000B reveals itself to be Metal Sonic who then challenges his organic doppelgänger to a race. Sonic beats Metal Sonic and Metal Sonic flees from the scene. Since Eggman didn't have any actual prizes to distribute to the winners, the tournament comes to a close with no confirmed winner but everyone agreed that they had a fun time.