Shell

Shell may mean:
 * Green Shells, the most common type of shell, worn by Koopa Troopas.
 * Red Shells, a special type of Koopa Troopa shells.
 * Blue Shells, rare shells that can make wings pop up on Yoshis. Mario can also use these as power-ups, turning him into Shell Mario.
 * Blue Spiny Shells, shells that have the power to home into other drivers in the Mario Kart Series.
 * Yellow Shells, extremely rare Koopa Troopa shells that can make Yoshis heavy.
 * Black Shells, explosive shells that are found only in Mario Kart Arcade GP.
 * Gold Shells, a type of Koopa Shells, found in Super Mario Galaxy and New Super Mario Bros. 2.
 * Spiny Shells, a type of shell worn by Spinies.
 * Bowser Shells, large shells that can only be obtained by Bowser, Koopalings, and Bowser Jr.
 * Shells worn by various other Koopas.
 * Bombshell Koopas, a type of Koopa whose shells can explode like a Bob-omb.
 * The Shell, a secret area in Super Mario Sunshine.
 * 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.
 * A prototype name for the Wii Classic Controller.
 * Triple Shells, a set of three shells found commonly in Mario Kart series and Mario Sport titles.
 * Shell Cup, one of the retro cups in the Mario Kart series.
 * Clams, a type of sea shell that will try to trap Mario.
 * Clampy, a clam enemy from New Super Mario Bros. Wii and New Super Mario Bros. U.