Secret Codes
Enter at the main menu.

Code	Effect
Hold L1 + R1, press X, O, O, Square	chicken headed people
Hold L1 + R1, press X, Square, Triangle, O	disable all head up displays
Hold L1 + R1, press O, O, Triangle, Triangle	high speed
Hold L1 + R1, press Square, O, Square, O	Japanese Crash Skin
Hold L1 + R1, press X, O, O, X	run into a car for an automatic KO
Hold L1 + R1, press O, O, Triangle, Square	toy block cars in single and multiplayer