I used the P acorn suit until I realized that the game doesn't allow you to post your success stories to miiverse once you do. It's not as harsh a penalty for using the super leaf in NSMB2, but it's still something.
The difficulty in this game is pretty average. There's nothing too out there with some minor exceptions.
Brawl FC - 1332 8069 6690 http://i.imgur.com/OZ9aS.png