All Story mode chapters
At the title screen, press Y, X, R, B to unlock all Story mode chapters.

All challenges
At the title screen, press Y(3), B(3), Y, X, B, X(3), Up, Down, Left, Right, L, R to unlock all challenges.

All characters and levels
At the title screen, press L, R, X, B to unlock all characters and levels.

All medals and trophies
At the title screen, press R, L, Y, X to unlock all medals and trophies.

Super Speed power-up
At the title screen, press L(2), R(2), L, R, L, R, X, B, Y(2).

Pizza One
At the title screen, press Up(2), Y(2), Right(2), B(2), Down(2), L, R, Left(2), X(2), L, R.

Pizza Two
At the title screen, press B(2), X(2), Right(2), Left(2), L(2).

Pizza Three
At the title screen, press Down(2), Right, B, Up, Y, Left, X, L(2).

Slammageddon
At the title screen, press Up(2), Down(2), Left, Right, Left, Right, Y, X(2), L, R.