Green Mario

Green Mario (later and better known as Luigi), is the older, and uncommon counterpart of Luigi.

Mario Bros.
In this, He is a plumber with his brother, Jumpman, and fight of turtles and crabs.

Super Mario Bros.
In this, He is the deuteragonist.

Super Mario Bros. 3
He is a playable character like the previous games.

Super Mario World
He is a playable character.