The Banana Peel (バナナのかわ, Banana no kawa) is an item in Super Smash Bros. Brawl. It can be thrown like any other regular item, and when someone else steps on it, they slip and are temporarily stunned. The banana itself flies a short distance sideways, just far enough that if the slipper rolls the wrong way, they will slip again. Diddy Kong's down special move generates Banana Peels even with items turned off, which is an important strategy in tournaments because it often disrupts an opponent's ground game, forcing them into the air. Banana Peels can also make opponents trip if their feet or shins touch a stationary banana during an attack on a platform above them. Unlike Banana Peels in the Mario Kart series, these peels do not have faces on them, and do not affect the paths of racing Shy Guys on the Mario Circuit stage.
This item made its first appearance in Super Mario Kart. In Super Mario Kart, the banana peel is an item that the player can throw on the road. If that same player or other players hit the banana peel, their kart will slip and spin around. The banana peel has appeared in every Mario Kart game since. In Brawl, the banana peel can be picked up and thrown on the floor. If a person moves over the banana peel, the person will trip; however, the banana peel does not work on the person who threw it.
The peel from a Japanese fiber banana of the Musaceae plant family. It contains a high volume of vegetable oil, which oozes out when the peel is stepped on, making things slippery. In Smash Bros., the peel fulfils its destiny as a comedic prop by making passersby slip. Characters who land on their backsides will be defenseless until they recover their footing.