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Standard: Does various humorous poses very quickly in a set order: Faces the screen with one hand on his waist, makes the peace symbol, turns to the right slightly pointing his hands that direction. Then, he places his right hand just below his nose, after that, he turns away from the screen, crouching, as if he's sad, and finally, he faces the screen once more, with both hands on his face, giving a frightened look, similar to the box art of the game Luigi's Mansion. He also makes a sound during each pose: "Hoh! Hah! Hee! Hey! Hoo!"
Side: Stands straight up with hands on hips, falls forward stiff on the floor, then seems to balance himself back up again. He says something that resembles "Pow pow".
Down: Bashfully kicks the ground and sighs. Currently, it is the only taunt that does damage.
Interestingly enough, Luigi position as a starter character in SSF2 is similar to him becoming a starter in Smash Wii U/3DS.
Luigi is one of (currently) five characters to have his availability status changed (he was an unlockable character in the original Super Smash Flash) the other four characters (so far) are Mr. Game & Watch, Lloyd, Naruto and Jigglypuff.
Luigi, along with Yoshi and Link, are the only characters so far to wear their default costumes in team battle when they are on the green team.
Luigi has a slight purple accent on his overalls. This is a reference to his design in Super Smash Bros..