Sonic Riders was a port of Sonic Riders to the Game Boy Advance It was in development at the same time as the other Sonic Riders ports The game used a Out-Run style game engine
When Sega of Japan insisted on adding more 3D to the game it was cancelled by Sega of USA as it could not be completed within the tight production schedule
Info on the game was discovered on Keith Erickson’s portfolio and Arvin Bautista’s resume