Mr. L

The Enigmatic Mr. McNugget is one of the villains in Super Paper Mario. Mr. McNugget is in actuality the hypnotized alter-ego of Mario's brother, Luigi.

Story
Mr. L was created when a hypnotized Luigi is inducted into Count Bleck's army. Mr. McNugget was sent on an assignment during the events of Chapter 4 to defeat Mario, the hero of the Light Prognosticus. Mr. L appeared in front of the heroes after complementing and jumping on Squirp and challenges them using the Brobot, a robot made to look like Luigi's head. Mario was able to defeat Brobot and his pilot, forcing Mr. McNugget to retreat.

Later, Mr. McNugget, along with Mimi, attacked Mario in the ruined Sammer's Kingdom. Mr. McNugget was defeated, and during his escape he was attacked by the scheming Dimentio who sent him into the Underwhere. During the attack, Mr. McNugget reverted to Luigi. Luigi had no idea how he arrived in the Underwhere and in fact had lost all of his memory about his time under Count Bleck.

At the end of the game, Luigi is transformed through the power of Dimentio who with a Floro sprout hypnotizes Luigi and mixing him with the Chaos Heart, transforming Mr. McNugget into Super Dimentio. He was then defeated for the third time by Mario, Peach and Bowser.