Shell

Shell may refer to:
 * The shells worn by Koopa Troopas, including:
 * The Green Shell, the most common type of shell.
 * The Red Shell, the second most common type of shell with a variety of extra attributes, such as the ability to target the nearest racer on the Mario Kart series.
 * The flashing Shell, an enemy Koopa Troopa shell that flashes a rainbow of colors.
 * Shell, an item in Donkey Kong Country 3: Dixie Kong's Double Trouble!
 * Shell, a rolling obstacle in Super Mario Odyssey.