If you need help in this game then try entering some of these codes. To enter the codes go to the 'Main' menu and then select the 'Options' menu and input the code for the effect you want to enable in the game.

Unlock ALL Cars:
Enter the code MATTEL07

Unlock Expert Mode:
Enter the code VRYFAST

Unlock Extreme Acceleration:
Enter the code 0TO200X

Unlock Unlimited Turbo Boost:
Enter the code ZZOOOOM

Unlock ALL Bonus Art:
Enter the code BUYTALL

Unlock Alternate Colors for Lightning McQueen
Enter the code NCEDUDZ

Unlock ALL Alternate Colors Besides Lightning McQueen:
Enter the code PAINTIT

Unlock ALL Arcade Mode Races, Mini-Games and Story Mode Worlds:
Enter the code PLAYALL