Bowser's Shell



A Bowser's Shell is a special item exclusive to Mario Kart: Double Dash!! that only Bowser and Bowser Jr. can receive. When released, it will bounce around the track like a normal Green Shell, tumbling any kart that it hits (unless the kart is star-powered or invisible, of course). After a Bowser's Shell hits the walls of a course roughly fifteen times, the shell will break apart.

It is unknown if these are just weapons used by Bowser modeled after him, or actually his spare shells.