Input the following codes at the 'Title' menu.
Unlock ALL Challenges:
Yellow, Yellow, Yellow, Red, Red, Red, Yellow, Blue, Red, Blue, Blue, Blue, Up, DOWN, Left, Right, L, R
Activate Speed Modifier:
L, L, R, R, L, R, L, R, Blue, Red, Yellow, Yellow
Activate Slammageddon:
Up, Up, Down, Down, Left, Right, Left, Right, Yellow, Blue, Blue, L, R
Unlock Pizza One:
Up, Up, Yellow, Yellow, Right, Right, Red, Red, Down, Down, L, R, Left, Left, Blue, Blue, L, R
Unlock Pizza Two:
Red, Red, Blue, Blue, R, R, Left, Left, L, L
Unlock Pizza Three:
Down, Down, Right, Red, Up, Yellow, Left, Blue, L, L