Luigi, Smashpedia

Luigi (SSBU) - SmashWiki, the Super Smash Bros. wiki

Luigi (Super Smash Bros. Melee), Smashpedia

Sonic

Sonic

Luigi, Smashpedia

My custom Fireball Luigi amiibo : r/amiibo

Alternate costume (SSBB) - SmashWiki, the Super Smash Bros. wiki

Not sure if legit, but here's a Screenshot of Smash bros character

Amiibo: Luigi