Deku Nut

A Deku Nut is an item from the The Legend of Zelda series which appears as an item in Super Smash Bros. Brawl, Super Smash Bros. for Nintendo 3DS / Wii U, and Super Smash Bros. Ultimate. Like in The Legend of Zelda series, a fighter can throw a Deku Nut at an opponent to stun them for a few seconds. The blast radius can affect several fighters at once. The effect is similar to players breaking other players' shields (or their own). It is possible for the thrower of the item to also be stunned during the explosion of the Deku Nut. If players are in mid-air during the explosion, they will be blasted away, similar to Bob-ombs. Deku Nuts will also explode on their own if left alone for a while. If picked up and held, they will still explode after a short while, stunning the holder of the item.

Super Smash Bros. for Nintendo 3DS / Wii U trophy information
Blue indicates exclusive to the Wii U version.