Original URL: http://www.psxextreme.com/ps3-cheat-print/160.html
The Simpsons: The Game

Infinite Power:
In the extras section from the main menu enter: Circle, Left, Right, Circle, Square, L1.

Lisa Outfits & Trophies:
In extras section: Square, Triangle, Square, Square, Square, L3.

Marge's Outfits & Trophies:

In the extras section: Triangle, Square, Triangle, Triangle, Square, R3.