Press Up, Up, Down, Down, Left, Right, Left, Right, Square, Circle and Triangle to unlock all bonus levels.
Press Triangle, Square, Circle, Triangle, Down, Right, Up, Left, L1, L1, Right, Right, Down, Up, R1, Circle, Left, Square, Square and Down to unlock all characters.
Press Left, Right, L1, R1, Down, Up, Right, Down, Circle, Circle, Triangle, Right and R1 to unlock all extras.
Press Square, Square, Square, L1, Right, Down, Triangle, Up, Left, Circle, Square, Down, Up, R1, L1, Down and Down to unlock all levels.
Press Square, Triangle, Circle, Square, L1, Circle, R1, Triangle, L1, Circle, R1 and Square to unlock all race levels.