Red Shell

The Red Shell an item featured in the first two Super Smash Bros. games, Super Smash Bros. and Super Smash Bros. Melee. It is the red counterpart of the Green Shell, and both of them are frequently worn by a Koopa Troopa, not including in the Mario Kart series. Koopa Paratroopas also wear either a Green Shell or a Red Shell, but with two wings attached to it.

When used, a Red Shell actively moves after the nearest fighter, even the one who threw it. Instead of sliding in the same direction it was thrown in after touching the ground, a Red Shell starts sliding from left to right, targeting the closest player. If a Red Shell is moving on a platform, it does not slide off, much like how red Koopa Troopas in the Super Mario series do not walk off the platform that they are on. If a Red Shell is stationary, it can be activated by being jumped on or upon coming in contact with a hitbox. Like the Green Shell, a sliding Red Shell stops moving upon being jumped on. If a Red Shell is reflected, its damage output is increased but its knockback is not. A Red Shell is the only item in Super Smash Bros. Melee that does not deal more knockback upon being reflected. A reflected Red Shell has a lot more hitlag upon hitting a player.

In Super Smash Bros. Brawls Adventure Mode: The Subspace Emissary and Super Smash Bros. for Nintendo 3DSs Smash Run, Koopa Troopas and Koopa Paratroopas wear either a Red Shell or a Green Shell. By jumping on or otherwise hitting either type of enemy, it retreats back into its shell. By doing either action again, the shell moves back and forth. In both modes, Red Shells function almost the same, but it does a bit more damage and knockback. Unlike Koopa Troopas wearing a Green Shell, those wearing a Red Shell come back out if left alone for a while.

In Super Smash Bros. Brawl, there is a Triple Red Shells sticker depicting its Mario Kart: Double Dash!! artwork.

Trivia

 * The behavior of a thrown Red Shell in the games is similar to that in the Mario Kart series, in which Red Shells' home into the nearest opposite driver running in front of the player who uses it.
 * In the first stage of Super Smash Bros. Melee's Adventure mode, there is a special bonus titled "Dead-Weight KO" that is earned for each Yoshi that is KO'd using a Red Shell.
 * In the original Super Smash Bros.'s Training mode, if four Red Shells are spawned in the same spot, and if Ness uses PK Fire on them, they inflict about 460% damage upon contact.
 * The Red Shell is one of six items in Super Smash Bros. Melee to not return in Super Smash Bros. Brawl, the other five being the Barrel Cannon, Cloaking Device, Egg, Flipper, and Parasol.