Mr. L is Luigi's brainwashed form. He made a cameo in MarioMario54321's Into The Fourth Dimension, when Mario was entering Hurl-ya Harbor. He almost made another appearance to be in a group known as the Striking Three with a brainwashed Mario and MarioMario54321, as Mr. M and Mr. Mx2, though Lily collected the 90th D-Star and stopped this from happening.
- He is also known as the Green Thunder for his alter ego.
- His main appearance was in Super Paper Mario.
- He was originally Brainwashed by Nastasia, but Dimentio then gained her ability.