Master code
Hold L and press Triangle, Square, X, Circle, Triangle, X, Square, Triangle, Circle, X at the main menu to unlock all cars, tracks, paintjobs, movie clips and modes.

Unlimited speed boost
Pause game play during a single player race. Then, hold L and press Square, Triangle, Circle, Square, Triangle, Circle.

Speedway Reversed bonus track
Hold L and press X, Square, Triangle, X, Triangle, Square at the main menu.

Cheat passwords
Select "Options" at the main menu. Select "Cheats", then enter one of the following codes to activate the corresponding cheat function.

Unlimited boost: Enter VROOOOM as a code.
All cars: Enter YAYCARS as a code.
All movie clips: Enter WATCHIT as a code.
All tracks and mini games: Enter MATTI33 as a code.
All art: Enter CONC3PT as a code.
Mater's Speedy Circuit: Enter TRGTEXC as a code.

 Boost
Defeat Boost during Story mode.

Chick
Defeat Chick during Story mode.

DJ
Defeat DJ during Story mode.

Doc Hudson
With the Gran Prix Cup 1.

Flo
With the Gran Prix Cup 1.

Sheriff
Win the Gran Prix Cup 2.

Snot Rod
Defeat Snot Rod during Story mode.

Wingo
Defeat Wingo during Story mode.

Mirror Cup
Collect all postcards in the Postcard Rally races in Story mode.