Red Shell

Basically the same as the Green Shell, this shell bounces back and forth in the same area of the stage. The Red Shell (, Red Shell) is an item from the series.

Origin
The Red Shells made their made their debut in Super Mario Bros. as the shells of the red Koopa Troopas, and has become a recurring item in later Mario games.

If a Koopa Troopa is jumped on, they retreat into their shells rather than be defeated altogether, which can be kicked as projectiles. If the shells are left out for too long, however, the Koopa Troopa can emerge out of its shell. The kicked shells can also pose a danger if they bounce off of a wall.

In  and in later games onward, if a Koopa Troopa is jumped on and retreats into its shell, it can be picked up, carried around. This, however, can be dangerous, as the Koopa Troopa can emerge out of the shell while carried and can damage the player holding the shell. In , however, Koopa Troopas can be ejected from their shells if they are stepped upon by Mario.

The Red Shell has become a recurring item in the  series. When used, it allows the players to throw the Red Shells and home in on the nearest opponent in a further place.

Although the Red Shell's behavior are based on the item in the Mario Kart series, the Red Shells also act similarly to the from Super Mario World where a yellow  will enter any Koopa Shell and pursue the player while still sliding on the ground. Also, it will not fall off the platform it is moving on, referencing how the red-shelled Koopa Troopas move back and forth on platforms and turn around at ledges.

Overview
The Red Shell debuted as a throwing item in Super Smash Bros.

When used, instead of sliding in the same direction it was thrown in after coming into contact with the floor like the Green Shell, the Red Shell will start sliding from left to right and targeting the closest fighter, even the fighter who threw it. Unlike the Green Shell, the Red Shell will not slide off any platform it is thrown upon, instead bouncing back as soon as it reaches an edge.

When stationary, the Red Shell will activate when jumped on or after coming in contact with a hitbox. Like the Green Shell, a sliding Red Shell will halt all movement upon being jumped on. It does moderate set knockback and therefore cannot KO opponents at any percentage except lower handicapped opponents. When reflected, its damage output is increased, but its knockback is not. A reflected Red Shell will also have much more hitlag when it hits a player.

The Red Shell does not appear in Super Smash Bros. Brawl, but Red Koopa Shells appear in the Subspace Emissary; however, when used, they function similarly to the Green Shell. This is also applied to the Smash Run in when the player's fighter defeats a red Koopa Troopa.

In single-player modes
In Melee's Adventure Mode, Brawls Subspace Emissary, and Smash 4s Smash Run, Koopa Troopas and Koopa Paratroopas can appear as regular enemies. Dealing enough damage by attacking them or jumping on them forces them to retreat into their shells. If the shell is left alone or carried for too long, then the Koopa Troopas will emerge out of their shells.

In Melee Red Koopa Troopa shells can be grabbed, carried around, and thrown like the Green Shell item to KO other enemies or damage opponents; however, it can deal fire damage and stronger damage and knockback upon contact.

Damage

 * Deals 15% if dropped in Melee.

As a Mii Costume
The Red Shell serves as the basis for the Red Shell Hat headgear for the s in.

Trivia

 * The Red Shell is the only projectile in Melee that does not inflict more knockback when it is reflected. It does, however, still deal more damage.
 * In the first stage of Melee's Adventure Mode, the player will earn the Dead-Weight KO bonus for each Yoshi they KO with the Red Koopa Shell.
 * In the original Super Smash Bros. Training Mode, if four red shells are spawned in the same spot, and if uses PK Fire on them, they will do about 460% damage upon contact.
 * The Red Shell, the Fan, the Team Healer, and the Spring are the only items to have been removed after appearing in multiple Super Smash Bros. titles.
 * As Super Smash Bros. for Wii U lacks a campaign mode such as Adventure Mode and Ultimate's Adventure Mode is made up of a series of battles, with no enemies aside from the fighters and bosses, they are the only games where the Red Shell never appears in a standard game mode.