Silver is not in Sonic Riders. However, he is unlockable in Sonic Riders: Zero Gravity by completing the Babylon story.
u can not
you can not but you can unlock super sonic
Sonic riders
you need to beat the game to unlock them
you play all misson thingyobobs
Beat the Hero story.
Beat both Team Rose and Dark missions to unlock
Beat Babylon Story.
ive never played it
Get all gold medals on all missions By Hunter Ho
If you're thinking of the Sonic Riders character, you cannot unlock him in Brawl.
sorry, you can`t unlock cosmo she`s in sonic x but she is not in any game and she can`t be unlocked sorry