The Banana Peel (バナナのかわ, Banana Peel) is an item in Super Smash Bros. Brawl, Super Smash Bros. 4, and Super Smash Bros. Ultimate. In Ultimate, in addition to Banana Peels appearing on their own, users will be left holding one after firing a Banana Gun.
The Banana Peel appears as an item in the Mario Kart series starting with the original Super Mario Kart: it can be placed on the course as hazards, and if a kart touches one it slips and spins around for a short time. The item serves as the logo of the Banana Cup since Mario Kart DS. In Smash, Banana Peels use a realistic design, as opposed to the cartoonish design with a face used in Mario Kart, and additionally can't cause the one who placed them to slip.
Slipping on banana peels is a classic slapstick gag, tracing its origins back to XIXth century America. The slipperiness of banana peels comes from vegetable oils contained within the peel, which are released as the peel is pressed (for example, by someone stepping on it). The Brawl trophy description states that the Banana Peels used in Smash are produced from Japanese fiber bananas (Musa basjoo), a species of banana commonly cultivated across East Asia.
The Banana Peel can be thrown like any other regular item, and when a character other than its thrower 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.
Banana Peels retain the same functionality in SSB4, with one critical difference - as soon as any character slips on them, they disappear, so they cannot be used more than once. This change did not exist in early versions of SSB4.
In Ultimate, Banana Peels no longer disappear upon contact with an opponent. Instead, they will last for two slips and/or throws until they disappear. Additionally, Banana Peels now have transcendent priority.
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.
Looks like someone had a nice snack and didn't bother to clean up afterward... As you may suspect, stepping on a banana peel sends you falling to the ground and exposes you to attacks. You can throw these at your opponents too, but please clean up when you're done, all right?
HEY! Put that banana peel in the bin! ...Oh, you're going to trip up your opponent with it? Carry on, then. Of course, picking up and throwing banana peels at people is disgusting, but they'll have a hard time keeping their defenses up if they're putting on a one-man slapstick act, so...go ahead.
The Banana Peel retains its characteristics from Smash 4, and can now appear either by itself or as part of the Banana Gun item. It does not appear as a Spirit, nor can any Spirits start a battle holding one. After shooting the banana gun, it gains all mechanics from the normal Banana Peel item, and can be thrown.
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