Ghost

"Ghost" can refer to:
 * Ghosts from the Mario Kart series, which are recordings of the player's driving performance.
 * Ghost from Super Mario Galaxy 2, a guide that the players can follow through the level.
 * The boss and enemy ghosts from Wario Land II.
 * Ghost T., a deceased Toad in Paper Mario: The Thousand-Year Door.
 * Additionally, there are are many types of ghosts in the Mario series.
 * Boos are the archetypical ghost enemy of the Mario series.
 * Portrait Ghosts are a major type of ghost found in Luigi's Mansion.