Blue Shell

Blue Shell
Game of Origin	New Super Mario Bros. DS
Works on enemies?	Yes
Works on Bosses?	No
Works underwater?	No

Blue shells can only be found in New Super Mario Bros. DS. They can only be found in flying red question mark blocks, or in multiplayer by collecting 8 coins or stomping a Blue Koopa. This Power-up give the player the ability to move like a koopa Shell.