Blow Up All Cars
Hold X + C-Up + C-Right + C-Left

Turn Player into Computer Drone
Hold Z and press C-Left.

Change Camera Zoom
Hold Z and press L or R.

Change Camera Angle
Hold Z and press Up, Down, Left or Right.

Quit Race and Win
Press Z + C-Down. This doesn't work in time trials.

Debug Mode
Pause the game and press C-Left, Up, Down, Down, C-Left, C-Right, C-Right, C-Up, C-Down.
Then enter one of the following codes while playing.

Slow CPU Cars
C-Right, C-Up, C-Left, C-Down, C-Right, C-Up, C-Left, C-Down.

Double Speed
C-Left, C-Down, C-Right, C-Left, C-Up, C-Down, C-Down, C-Down, C-Down

Big Bounces
C-Left, Right, Right, Down, Up, Down, Left, Down, Down

Behind Car View
Left, Right, C-Left, C-Right, Left, Right, C-Left, C-Right

Any Object
Down, Down, Up, Up, Right, Right, Left, Left

Transform Car (in challenge mode)
Down, Down, Up, Up, Right, Right, Left, Left

Cheat Codes
Pause the game before entering these codes.

Nine lives in challenge mode
Enter MOGSLIFE as a name at the character selection screen.

Tanks in multi-player mode
Enter ALLTANKS as a name at the character selection screen in multi-player mode.

Turbo Jump
Just as you hit the finish line on the last lap, press R to jump. If done right you will jump very high. It doesn't do much, but it looks cool.