Shell

Shells, or Koopa Shells, are a family throwable items present in the ' series, coming directly from the ' series. There are four kinds of shells, each one having its own unique properties, which are:


 * Green Shell, a sliding shell that knocks everything on its path.
 * Red Shell, a sliding shell that follows and targets on players.
 * Yellow Shell, a sliding shell that buries players on contact.
 * Spiny Shell, a flying shell that homes on the leading player, exploding on contact.