Luigi is Mario's younger brother, who has lived his life in Mario's shadows. He has appear in all 5
Super Luigi
installments, and was players 1, 2, 3, and 4. (players 2, 3, 4 if you don't count New Super Luigi U .) 

Luigi  is the younger and taller brother of Mario from the Mario series and the deuteragonist of some of the series' titles. Making an appearance in almost every Mario game and starring in three games, as the main protagonist, over time he has become a well known character.He never seems to like going on adventures without Mario. But In some games, usually in the Mario and Luigi RPG series, Luigi is simply referred to by enemies as "Mr. Green Hat" and other generic names, making him out to be somewhat unnoticed by Bowser and his minions. For example, in the Super Mario Galaxy series, if Luigi shows up at the final battle with Bowser instead of Mario, Bowser will be surprised that Luigi has come instead of Mario, who he is used to fighting. Other than his color being green, he was planned to be exactly like Mario, but as his popularity grew, he developed a personality and style of his own. His jumping ability surpasses Mario's by far and he is normally depicted as cowardly and scrawny, but when he does get the courage to step up, he can be tough and overcome his fears.

Power-Up CostumesEdit