Enter the following codes during game play.

All Bonuses:
Enter your name as 'VADKRAM' to unlock all bonuses
Low view:
Up, Up, Left, Left, R, Z, L, Z
Psychedelic view:
L, Z, R, Z, Left, Left, UP, UP
Invisibility:
Up, Right, Down, Left, Z, Left, Right, Left

Low Rider:
Up, Up, Down, Down, A, X, Y, B
Big head mode:
Y, B, A, X, X, A, B, Y

Wacky Car:
Up, A, Down, Y, Left, X, Right, B
Monster truck:
L, L, Left, Right, Z, Z, Z, Z
Trike cam:
Up, Up, Right, Right, R, Z, L, Z