Luigi is a playable character in the Brawl mod Project M. His gameplay is based on his appearance in Melee. He is ranked 26th on the official tier list in the top of the C tier, a much lower position than his Melee placement, where he was 12th out of 26, however barely higher compared to his Brawl placement, being 28th out of 38, respectively.
Luigi is a middleweight with a moveset that boasts a fast and powerful set of aerials, rapid approach methods, and spontaneous power. With his incredibly long wavedash, Fireballs, and the mobility of Luigi Cyclone, Luigi can take advantage of any lapse in defense. His wavedash (the longest in the game) couples well with his collection of deadly smash attacks, allowing him to approach and immediately put out a powerful hit. He can space out opponents using his fireballs, and his combo game, especially in the air, is very potent.
Luigi suffers, however, in recovery and his speed in some areas, especially with his long wavedash being born from his very low traction at a cost. His low ground speed can be covered by substituting wavedashing for normal dashing, but his low aerial and falling speeds can hinder usage of his otherwise good aerials. Off stage, Luigi must deal with a fairly predictable and easy to edge hog return. Additionally, his floatiness makes him among the easiest characters to KO vertically (easier to KO than the floatier Samus due to her extra weight), making attacks with high vertical power (such as Fox's up smash) deadly against Luigi; as such, he has relatively poor vertical endurance and players must know to cope with and avoid said attacks.
Changes from Melee to PM
Grabs, throws, and other
Changes from PM to P+
Down Special (Luigi Cyclone)
Side Special (Green Missile)
Up Special (Super Jump Punch)
Up to date as of version 3.6.
In competitive play
Luigi has an alternate costume based off of his alter ego, Mr. L, from Super Paper Mario. When wearing the costume, Luigi wears a black mask, his outfit becomes black and green instead of blue and green, and the "L" on his cap is reversed.
3.6 includes recolors for team battles, and a white "Fire" variant for Mr. L.
In Project+, Luigi is given a new recolor based on his appearance in Super Mario Bros.: Pīchi-hime Kyushutsu Dai Sakusen! Luigi also gains an alternate "Casino" costume based on the casino-themed minigames from Super Mario 64 DS and New Super Mario Bros.
Z-Secret Costume: Fake Peach (Mario & Luigi: Superstar Saga).
R-Secret Costume: Space Land Luigi (Mario Party 2).