Infinite Power
Head to the extras section of the main menu and insert the following code, which will give each of your characters infinite power: Circle, Left, Right, Circle, Square, L1.

Infinite Power
Go to the extras section of the main menu and insert the following cheat code. It will give each of your characters infinite power:
Circle, Left, Right, Circle, Square, L1

Lisa Outfits & Trophies
Description: Unlock all Lisa-related outfits and trophies,
How to unlock: Insert the following code while browsing the main menu:
Square, Triangle, Square, Square, Square, L3 (click left analog stick)

Marges Outfits & Trophies
How to unlock: Go to the games main menu and insert the following password:
Triangle, Square, Triangle, Triangle, Square, R3