i don't no
there are no cheats for sonic riders...
well not yet at least...
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sonic riders: free riders
Aside from shortcuts, there are no cheats for this particular Sonic game.
Sonic riders zero gravity is good cause of the character selection was better and the graphics were awesome, but zero gravity kinda sucks since you can't boost like the original sonic riders. I technically think that the story plot was the best in Sonic Riders; it's the game itself and it's plot.
Its adventures of sonic the hedgehog, sonic x, and others like that
No there isn't