Shrek SuperSlam

All characters and levels:
Press L, R, B, X at the title screen.

All medals and trophies:
Press R, L, Y, X at the title screen.

All story mode chapters:
Press Y, X, R, B at the title screen.

All challenges:
Press Y(3), B(3), Y, X, B, X(3), Up, Down, Left, Right, L, R at the
title screen.

Super Speed power-up:
Press L(2), R(2), L, R, L, R, X, B, Y(2) at the title screen.

Pizza One:
Press Up(2), Y(2), Right(2), B(2), Down(2), L, R, Left(2), X(2), L, R
at the title screen.

Pizza Two:
Press B(2), X(2), R(2), Left(2), L(2) at the title screen.

Pizza Three:
Press Down(2), Right, B, Up, Y, Left, X, L(2) at the title screen.

Slammageddon:
Press Up(2), Down(2), Left, Right, Left, Right, Y, X(2), L, R at the
title screen.