Along with having the longest wavedash by far, allowing him to slide halfway across FD, Luigi is able to keep all of his momentum off a platform by hitting the b button.
@20:00
@2:37, 2:51, 9:34, 14:30
For some reason Luigi has 1 extra move than the rest of the cast, and it’s a meteor smash on aerial opponents.
Luigi has a rest-like move with rest-like setups, and it can be platform cancelled.
Luigi launches himself like a rocket. ⅛ chance for it to send him flying across the stage with very high knockback. Also allows Luigi to recover horizontally. This move has no actual source in the Mario universe, it was just made up because Luigi is a stupid character.