|Kind of Item||Koopa Shell|
|First Appearance||Super Mario Bros.|
|Roams around and travels in a straight line.|
A Green Shell is a green-colored Koopa Troopa Shell. They are worn by the most common Koopas and can also be weapons in the Mario Kart Series. When stomping a Green Koopa, it will or hide in its shell or will be kicked out its shell. In both ways, the Green Shell could be used anyway. If it is used in spinoffs or sidescrollers, it always bounces off. This can hurt enemies, but Mario and co. as well.
Mario Basketball: Mushroom Tourney
In Super Mario Galaxy Odyssey, Green Shells once again return, serving the same purpose as they did before. This time, however, they also appear in Item Crystals, and sometimes Koopas will kick their shells down hills or Bullet Bill Blasters will shoot them down hills at Mario.
The Green Shell reappears in the Mario & Luigi series as a returning Bros. Attack, once again under the name 3D Green Shell, and being one of Luigi's Bros. Attack, which uses up 3 Bros. Points. It is obtained by finding all 10 Attack Pieces in Rabbit Village. It acts similar to how it did in previous installments, though the amount of hits is the same as in Mario & Luigi: Paper Jam.