Cheat Menu 
At the main menu, highlight the -Options- selection, then hold 
L + R + X + Y to display a cheat menu at the bottom of the screen.

Then, enter one of the following codes to enable these cheat functions:

All tracks 
Highlight the All Tracks option on the cheat menu, then hold 
A + X and press R. Release the buttons, then hold 
X + Y and press L. Release the buttons, then press 
A, A, Y, Y. 
Hold L + R and press X. 

All cars 
Highlight the All Cars option on the cheat menu, then press 
A, A, Y, Y, L, L. 
Hold R + X. Release the buttons, then hold L + A.

All parts 
Highlight the All Parts option on the cheat menu, then hold 
X + Y + A + L + R. Release the buttons, then hold Y + A. 
Release the buttons, then press X, X.

Invincibility 
Highlight the Invincible option on the cheat menu, then hold 
L + X and press Y, A. Release the buttons, 
then hold R and press A + X + Y. 

Invisible track 
Highlight the Invisible Track option on the cheat menu, then press 
R, L, Y, X, A, A, X, Y and hold L + R and press A. 

Track orientation 
Highlight the Track Orientation option on the cheat menu, then hold 
L + R and press X. Release the buttons, then press A, X, Y. 
Hold L + R and press X.

Invisible car 
Highlight the Invisible Car option on the cheat menu, then hold 
L + X. Release the buttons, then hold R + Y. Release the buttons, 
then press A and hold L + R and press X. Release the buttons, 
then press Y, Y, Y.

Heavy car 
Highlight the Mass option on the cheat menu, then hold A and press 
X, X, Y. Release the button, then press L, R. 

Car collisions 
Highlight the Car Collisions option on the cheat menu, then hold 
L + R + X + Y + A. Release the buttons, then press X, Y, A.

Super speed 
Highlight the Super Speed option on the cheat menu, then hold 
Y + R and press L. Release the buttons, then hold A + X. 
Release the buttons, then press A, A, A.

Super tires 
Highlight the Super Tires option on the cheat menu, then hold 
R and press X, X, X. Release the button, then hold L and 
press A, A, Y. 

Tire scaling 
Highlight the Tire Scaling option on the cheat menu, then press 
X, Y, A, X, Y, A. Hold R + A.

Frame scale 
Highlight the Frame Scale option on the cheat menu, then press 
L + A, A + Y, R + A, A + Y.

Brakes 
Highlight the Brakes option on the cheat menu, then press 
Y, Y, Y and hold L + R + A + X. 

Resurrect in place 
Highlight the Resurrect In Place option on the cheat menu, then press 
R, R, L, L, A, X, Y. 

Auto abort 
Highlight the Auto Abort option on the cheat menu, then press 
A, L, X, R, Y. Hold L + R and press A, X.

Car mines 
Highlight the Car Mines option on the cheat menu, then hold 
L + R + X and press A, Y. Release the buttons, then press A, Y.

Cone mines 
Highlight the Cone Mines option on the cheat menu, then hold 
Y + R + L. Release the buttons, then press X. Hold A + X. 
Release the buttons, then press X.

Suicide mode 
Highlight the Suicide Mode option on the cheat menu, then press 
Y, R, L, R, L. Release the buttons, then press X, R, L, R, L. 

Battle paint shop 
Highlight the Battle Paint Shop option on the cheat menu, then hold 
Y and press R, L, R, L. Release the button, then press X, X, X.

Change fog color 
Highlight the Fog Color option on the cheat menu, then hold L + X. 
Release the buttons, then hold A + X. Release the buttons, then hold 
Y + X. Release the buttons, then hold R + X.

Random battle mode weapons 
Highlight the Random Weapons option on the cheat menu, then hold 
L + A and press X, Y. Release the buttons, then hold R + A and 
quickly press X, Y.

Toggle demolition battle mode 
Highlight the Demolition Battle option on the cheat menu, then hold 
L + A and press Y, X. Release the buttons, then hold R + A and quickly 
press Y, X. In this mode, all of the weapons that are picked up will be
battering rams. You have to physically hit an opponent to destroy him. 
This code overrides the "Random battle mode weapons" codes.