Sonic Riders: Zero Gravity for Nintendo Wii

Sonic, Tails, and Knuckles are alerted to robots from Meteor Tech attacking the city of Molecurpea, the famous city of the future. They set out to retrieve the legendary artifact known as the "Shooting Star" (In the English game, its know as the Arks of the Cosmo), an item that has the ability to control gravity. Along the way they discover surprises, including the Babylon Rogues, a group of avian thieves who are also after the Shooting Star. This sets off a war between who gets the artifact, now leading them to settle their dispute by having an Extreme Gear competition. In a trailer of the Japan site show the Babylon Garden arrives of a portal to a planet and at the end the Babylon Garden floats to something like a Black Hole and the Babylon Rogues follow the Babylon Garden.