The Gust Bellows is a weapon from The Legend of Zelda: Skyward Sword, and it was introduced as an item in Super Smash Bros. for Nintendo 3DS/Wii U. It was revealed on Sakurai's Miiverse page and simultaneously on the Smash Bros. website.
The Gust Bellows can blow opponents away with its powerful wind blasts. When someone drops it, though, the gusts run wild. The Gust Bellows will not make opponents flinch, making it a good edgeguarding weapon.
Unleash gale-force winds upon your foes to blow them far away. Unfortunately, it's just air, so it won't do any damage except maybe mess up their hair. Dropping or throwing it will cause it to spin around, blowing air everywhere. Don't blow yourself outta the fight!
Wii - The Legend of Zelda: Skyward Sword (11/2011)