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Nintendo DS - Race Driver: Create & Race cheats

Go to the Extras menu, then select Cheat codes.
Input the following passwords here:

Password - Effect

942785 - Unlock all Challenges
761492 - Unlock all Championships
611334 - Easy Steering
505303 - Takes no Damage
467348 - MM View
374288 - Miniature Cars
171923 - Free Drive
112337 - Unlock all Rewards