He can jump higher than his brother, Mario. His Up Special, Super Jump Punch, will gain maximum damage and launching power when hitting the opponent right at the start. It truly is a "Special" move. He also uses his new Poltergust for his throw!
Up Taunt: Rapidly switches between five different expressions. The first is Luigi facing toward the screen with his legs apart and left hand on his hip, giving a peace sign while having a deadpan look on his face. The second has Luigi looking scared while hunched over and pointing to the left. The third has Luigi at a three quarter view toward the screen to the right, standing with his legs apart and bent, while rubbing his nose. The fourth has Luigi crouched at a three quarter view away from the camera to the right, with his arms laying on his knees. The fifth and final one has Luigi strike a pose similar to the box art of Luigi's Mansion.
Side Taunt: Luigi does a plank, then somehow comes back upright while making a noise that sounds like "pow pow".
Down Taunt: Dejectedly kicks the ground (this taunt will deal 2% damage and powerful set knockback if it connects and is a spike on aerial opponents).
Luigi jumps out of a pipe, with both hands on his head, saying unenthusiastically "Let's a go."
Scratches his nose.
Scratches the back of his head.
Luigi goes into an angled position and falls down, teleports back up and does it again. After that, twitches his nose.
Performs his dash attack animation to both sides and then catches his breath.
Turns around, does finger guns with both his hands and then spins his hands around in a circular motion, still in a finger gun.
Upon the release of the trailer for Simon and Richter Belmont, Luigi received a rather tongue-in-cheek outpouring of grief and mourning from fans toward his unfortunate "demise" in the trailer, where the plumber has his soul slashed out of his body by Death. The event itself was reported by several news websites including the BBC, though Nintendo UK eventually reported on Twitter that Luigi was alright, and managed to reclaim his body in time.