Been playing a little bit the last 3 weeks.
Luigi/Shiek
25/75
Sheik is just waaaaay too dominant in this matchup.
Needles for everything(basically destroying wavedash approaches at any given time) combined with a bunch of easy grab options and a ton of moves that luigi will, at best, trade with, makes this a very one sided match.
Shiek also ***** Luigi's recovery almost as bad as Jiggs can(IMO Shiek is better at it).
Now, don't get me wrong, Luigi can deal some damage to Shiek(lots of throw options including forward throw wavedash to jab reset up B, if you can catch the non tech, the problem is getting the grab), but Shiek just does it more and does more %(usually leading to 3 or 4 hits before luigi can get back on the offensive) when she does get the hit(especially if its a grab).
Luigi/Falco
40/60
Falco has a lot going for him(lasers) and definitely butt fvcks luigi, but not as bad as Fox does(who has a 35/65 match vs weegee).
I think Falco's recovery plays a very important role in not being as dominant as fox here.
Tho, Falco can kill luigi with 2 shines on YS at 0%. . . .
Still, Luigi can usually kill Falco after 2 get ins, especially if a grab is involved.
Luigi/Marth
30/70
I added Marth here because I think Luigi has a harder time with Marth than Fox.
That's all I'll say here for Tiara wearer.