Shell

Shell may refer to:
 * Green Shell, the most common type of shell, worn by Koopa Troopas.
 * Red Shell, a special type of Koopa Troopa shell.
 * Blue Shell, a rare shell that can make wings pop up on Yoshis. This shell can also act as a power-up, turning Mario into Shell Mario.
 * Blue Spiny Shell, a shell that has the power to home in on other drivers in the Mario Kart series.
 * Yellow Shell, an extremely rare Koopa Troopa shell that can make Yoshis heavy.
 * Black Shell, an explosive shell found only in Mario Kart Arcade GP.
 * Gold Shell, a type of Koopa Shell, found in Super Mario Galaxy, Super Mario Galaxy 2, and New Super Mario Bros. 2.
 * Spiny Shell, a type of shell worn by Spinies.
 * Bowser's Shell, a large shell that can only be obtained by Bowser, Bowser Jr., and the Koopalings.
 * Shells worn by various other Koopas.
 * Triple Shells, a set of three shells commonly found in the Mario Kart series and Mario sports titles.
 * Shell, an item in Donkey Kong Country 3: Dixie Kong's Double Trouble!.
 * Shell Earrings, a special item from Paper Mario: The Thousand-Year Door.
 * Shell Cup, one of the retro cups in the Mario Kart series.
 * Shell's Secret, a secret area found in Noki Bay in Super Mario Sunshine.
 * Bombshell Koopa, a type of Koopa whose shells can explode like a Bob-omb.
 * A prototype name for the Wii Classic Controller.
 * Clam, a bivalve enemy that will try to trap Mario.
 * Clampy, a clam enemy from New Super Mario Bros. Wii and New Super Mario Bros. U.