Shell Mario

Shell Mario (also known as Koopa Mario ) is a form of Mario that Mario can become in New Super Mario Bros. by touching a Blue Shell. It allows him to use the Hammer Suit-like ability to dodge the attacks of enemies when he crouches, tucking into it. However, if he ducks while running he will hide in the shell and the shell will slide through the world, bashing through lots of enemies. This maneuver is called a Shell Dash.

Trivia

 * In any of the boss fights with Bowser Jr, Mario or Luigi can use the shell dash to knock the young koopa out, similar to what the player do in later fights, where the player need to throw koopa shells at him before jumping on him.


 * Shell Mario also has better control and faster speed inside water, than any other variation of himself.