Orange cube
From Mariopedia, a wiki on Mario, Yoshi, Wario, Donkey Kong, Super Smash Bros., and more!
An Orange Cube is an item found in The Subspace Emissary of the game Super Smash Bros. Brawl. The cubes contain valuable items and will not reappear once you get them. Finding the boxes and getting their treasures is another way to increase your clear percentage.
Also, items that are different from orange cubes occasionally appear—these also affect the clear percentage.
