Luigi is so poorly designed in each smash game.
In 64 he is an all around weaker Mario, and will be the bottom tier in the next 64 tier list.
In Melee the same thing is true, except Wavedashing randomly makes him different and gives him a ton of unique options. If not for that, he's again be an all around weaker Mario. And no, the side B doesn't help. It's so easy to time out.
Then in Brawl, it is mostly the same thing again, except this time Mario is bad with Luigi, instead of Mario being slightly above average.
Really Luigi needs a more unique skillset. The floaty style is great, but he needs more super useful aerial attacks and/or more aerial combos than Mario. A new neutral air (which he doesn't have), an improved back air (bring back the 64 back air=???), and more combo strings with the up air would help.
Giving Luigi a different kind of neutral B (3 rows of fireballs, super fast fireballs, or fireballs that go slow and act like Wolf's blaster),a less predictable forward B (make it's starting launching distance farther to increase his mobility and make it hard to time out) with more offensive usefulness, making the down B have tornado suck in physics, and increasing the size of the sweet spot of Luigi's up B (make it have a higher hitbox too, and make it KO like Jigglypuff's 64 and Melee rest), and then we are TALKING!!!
Oh, and can Luigi get actually unique grab throws=??? Please=??? Seriously, everyone else has unique grab throws. Oh, and giving Luigi more range (kind of like Diddy with his extended arms) would additionally be helpful.
See how easy it is to fix Luigi's skillset, moveset, and playstyle=??? This makes me wonder why I am still either the only person or one of a small group of people suggesting these kind of changes for Luigi when it is so simple=???
Mario's fsmash can't even kill as reliably as Luigi's downsmash lol.
It's common knowledge that Mario lacks a good finisher, when Luigi and Doc got diverse KO options.
I lol'd so hard. Dude this is so wrong.