Crash Tag Team Racing
Enter at the main menu:
Chicken headed people:
Hold L1 + R1, press X, O, O, Square
Disable all head up displays:
Hold L1 + R1, press X, Square, Triangle, O
High speed:
Hold L1 + R1, press O, O, Triangle, Triangle
Japanese Crash Skin:
Hold L1 + R1, press Square, O, Square, O
Run into a car for an automatic KO:
Hold L1 + R1, press X, O, O, X
Toy block cars in single and multiplayer:
Hold L1 + R1, press O, O, Triangle, Square