Cars - Cheats

matti33 - Unlocks All Tracks and Mini Games
watchit - Unlocks All Movie Clips
yaycars - Unlocks All Cars
conc3pt - Unlocks Art
vroooom - Infinite Boost
trgtexc - Unlocks Mater's Speedy Circuit

Unlimited Nitro:
Press the following buttons on the main menu: X, Square, Circle, Circle, Circle, Triangle, Square, X.

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

Sheriff:
Win the Gran Prix Cup 2.

Snot Rod:
Defeat Snot Rod during story mode.

Wingo:
Defeat Wingo during story mode.

Alternate paint colors:
Beat the goal time for one of the following tracks in Time Trial mode to unlock an alternate paint color for the indicated car. A different color will be unlocked depending on if you finish in first, second or third place.
iverhl emg ay, toty, .

Lightning McQueen: Figure 8 track
Mater: Desert Canyon Dash track
Sally Carrera: Radiator Springs track
Wingo: Interstate track

Turbine Canyon: Shortcut
The first shortcut is where there is about five or six obstacles. Jump or drive over them.

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