Luigi wears Loki's mask from the film “The Mask”(not Loki from the MCU), which, as in the film, gives him cartoonish powers.
https://www.youtube.com/playlist?list=PL5B4883B650E4A698
Statistics:
🥊 Attack: 4,8/5
👟 Speed: 4,7/5
🪽 Jump: 5/5
🛡️ Defense: 4,3/5
⚖️ Weight: 3,7/5

intro: Luigi puts the mask on his face and in a tornado effect transforms into Green Thunder who says “SSSSSSSSSMOKIN”.

jab: strikes 3 times with boxing gloves
foward tilt: throws a bomb like a bowling ball
Up tilt: his hat spins in the air
Down tilt: frog's tongue
dash attack: puts on a Bowser mask to spit fire
foward smash: enlarges his head to bite with his teeth turned into a wolf trap
Up smash: pulls a spring out of the ground by tapping his foot
Down smash: hammer blow
Neutral air: inflates like a balloon before becoming thin again
foward air: he puts on a frightened face as he pulls his big eyes, skull and long tongue out of his mouth and eyeholes
Back air: he turns behind himself and makes his big heart beat
Up air: he throws a bomb in the air
Down air: fire fart downwards which makes it rise a little
Neutral B: super horn
side B: water jet in fireman's costume
Up B: tornado
Down B: he takes out a heavy machine-gun from his pocket and fires it, saying he has the permit for it.
taunt: he takes out 2 hammers from his 2 pockets and laughs like a madman.

other stuff:
- he can talk and his voice can be activated/deactivated
- when he's selected in the character selection screen, he says “SSSSSSSSSMOKIN” or “Sssssomebody stop me”.
- his sprite sheet: https://www.deviantart.com/timelordparadox/art/Green-Thunder-Sprite-sheet-1150822604

compatible with:
- Weegee laser
- Miiverse
- Pokemon Stadium
- Final Smash: Green Thunder quickly turns into a tornado with 2 hammers in his hands. Not only does it hit you very hard, but it also ejects you a long way, and since he's going so fast, it's hard to avoid him, at the very least, you'd have to have a crazy reflex to dodge this attack.

skins:
- green head, blue smocking and hat, white gloves, shirt and feather, brown shoe: default
- green head, yellow smocking and hat, white gloves, shirt and feather, dark grey shoe: original the Mask
- head green, smocking and hat dark red, gloves, shirt and feather white, shoe dark gray: first transformation (The Mask the movie)
- green head, black smocking and hat, white gloves, shirt and feather, brown shoes: gangster
- green head, white smocking and hat, gloves, white shirt and feather, brown shoes: Smooth Criminal