I'm just making assumptions, but: Link, Falco (crawl armor, I guess?), Lucas, Pit, Sheik, Samus?
You're right about the crawl armor on Falco. Imo that's actually one of Bowser's few winning matchups.
Sheik and Samus are reasonable guesses. I think Sheik is actually winnable, though - could be anywhere between 6:4 and 8:2 in Sheik's favor. IMO it's probably closest to 65:35. You can crawl through her needles if you have to, she can't chaingrab Bowser quite as effectively, and the improved dtilt and flame cancel and nair help *loads* in the MU.
Samus:
maybe, but few to no Samuses actually use her new and improved tools (cough, zair) properly. I don't actually have that many problems with them. Bowser can powershield most her stuff pretty handily. While the MU is far from in Bowser's favor, it's certainly not unwinnable, at least the way most Samuses play. 6:4 in my experience. Her bad air mobility and floatiness (ie. she dies to Fortress pretty early) help a lot.
Link: Yes. Unwinnable, or near enough to it that it doesn't matter. There's no way to realistically get through Link's boomerang, zair, and grab.
Lucas: similar tools to Link (notably the zair - Bowser can't do anything about it). Borderline unwinnable, especially considering how easily he 0-deaths Bowser. Could be anywhere from 80-20 to 100-0 once the Lucas is good. If the Lucas sucks, Bowser can take it ez.
Pit: Brutal MU because Pit is just a godlike character in general, and Bowser sucks; but not unwinnable for the same reason Falco's not unbeatable - you can crawl through his most important tool. Maybe 3:7.
Matchups you missed:
Ivysaur - Grab *always* leads to a free upB, and pretty much everything else leads into everything else. Also, Bowser has no means of avoiding grabs because his spotdodge is worse than the Holocaust. And he can't edgeguard Ivy. And her edgeguards on Bowser are 100% free.
Mewtwo - similar to Ivysaur, and his reach is even more obnoxious. Important to note though that bad Mewtwos actually get rocked by Bowser. Only if the Mewtwo is competent does the matchup become bad. If he's
good, the MU is unwinnable. Bowser simply has no way to ever,
ever, get in on a good Mewtwo. The projectile, the ludicrous CC game (which leads to guaranteed 0-deaths out of dtilt or grab or fair), and the fact that M2 outranges Bowser, has an unfollowable roll and techroll, and can't be edgeguarded results in an absolute clusterduck.
Captain Falcon - Yeah, it's a weird matchup to lose 0-100. Basically, it's a result of his perfectly safe shield pressure on Bowser, combined with incredible DD game and the fact that he can 0-death Bowser every time. CF is just a perfect storm of things Bowser sucks at dealing with, though notably he doesn't have a perfect edgeguard game on Boozer, like Ivy or Mewtwo.
Diddy - Command grab, ludicrous projectiles, amazing edgeguarding, extremely difficult to edgeguard himself, a command grab that leads to a guaranteed spike(!), ridiculous neutral game in general, awesome upb ooS, Bowser's item throw animations are terrible. Bowser can't beat Diddy, except *maybe* on WW.
Honorable mention to Lucario, who may not be utterly impossible due to his own neutral game not being that much better than Bowser's, but whose command grab is impossible to miss on Bowser, and can dunk him from pretty much anywhere, at any time. Legit 90:10.
Other notable extremely rough, if not entirely unwinnable MUs:
-Zelda
-Fox (If he DD camps properly)
-MK (If he DD camps properly)
-ROB (80:20 or 90:10 for similar reasons to Diddy and CF)
-Olimar (Side-B all day)
-Mario (holy ****)
-Snake (Bowser can't really get through the spam)
-Wario (command grab, edgeguarding)
-Jigglypuff (rest)
-Kirby (command grab, edgeguarding, dash attack for free punishes anytime Bowser does anything)
All told, Bowser has winning matchups on
maybe a small handful of characters (Falco, Peach, maaaaaaaaaybe Pikachu), but I'm pretty skeptical that he even beats those. He actually has far more impossible relevant matchups than he does in Melee, and most of his 'winnable' MUs are still terrible.
I'm sure this all sounds incredibly biased, but the simple fact is that I don't really practice or play Bowser anymore, despite him being by far my favorite character in any Smash game (and tons of practice with him in both Melee and PM). I get far better results with my:
- Toon Link
- Wolf
- Falco
- Mario
- Charizard
- Diddy
- Kirby
- Luigi
- Samus
than with Bowser, though I haven't done nearly as much tech or game practice with any of them. If he's not fixed next patch, then I guess I'll continue not playing him. I'd like him to be viable, but who knows what'll happen?