Super Paper Mario is currently my favorite game on any system. The game isn’t heavy on cheat codes, but there are some cool unlockables that you might be interested in checking out.
Infinite 3D -
To score Infinity 3D you must defeat the Flopside Pit of 100 Trails TWICE and get Mario’s card.
Blue Hair for Princess Peach –
After you have been the game, go talk to Bleu in Flopside.
Hammer Whacker –
In the backroom of The Overthere in Flopside there is a treasure chest with a Golden Card inside that will hook you up with the Hammer Whacker
If u got all 4 “heroes” u can defet anyone in 1 attack (including bosses)
just shake the remote and press A and B at the same time