Redbox shared a free cheat code via their Facebook page:
Details:
Rent The Croods: Prehistoric Party for Wii from Redbox and take advantage of this exclusive Mushroom Mayhem cheat code! It will allow your character to bounce around on top of the mushrooms and avoid the piranhakeet swarms.
Instructions to unlock:
From the Title Screen, enter
↑ ↑ ↓ ↓ → → ← ←
using the +Control Pad
(Hold the Wii Remote upright when entering the code.)
Reserve your copy tonight and try it out:
Don't forget you can use ebates.com and get cash back on your rental.
Best Buy.