I hope this thread won't be closed, since it's much better than the other two.
I'm curious about Olimar and the other characters and I might pick them up and look at what they can do. On this occasion, I'd like to mention that Sheik can do a grab release -> slidilg usmash on MK (according to MK atomsk does it all the time). So you may look at her too.
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Right now, I'm analysing Bowsers capabilities. I was really upset when people said he sucks, because he's a really good character. The more I use him, the more certain I am, that he belongs to High tier.
I've been using him more often against Meta Knight and the results are pleasing. I think he's surprisingly good against MK, although I need to test a lot more (I also think he's good against Snake but he obviously sucks vs Dedede).
Bowser has some useful tools against MK and if you ever use them properly, you'll find out why Bowser is so underrated. He is just really good. His ftilt beats every move of MK except the ftilt. It's use against the tornado is somewhat questionable. Sometimes they cancel each other out, sometimes Nado wins, sometimes Bowser ftilt wins. It has something to do with the range of both attacks. I have to figure out how it works. The tornado is a very strange move, especially when you look at ist priority.
Bowsers dtilt beats a lot of MKs moves too and is a good KO move, although I find myself using it too often to be a reliable KO moves.
Bowser has one of the most effective - if not the most effective - punishing options in the game. As soon as the opponent is open for a frew frames, the whole defense is a whole gamble situation, because you'll never know, whether Bowser will use the Koopa Claw, which you can't shield but spotdodge or whether he'll use the fortress, which you can't spotdodge but have to shield. Either way, once Bowser lands one of these hits it's a free 20% damage no matter which attacks he uses.
Fortress is absurdly useful in this battle, thanks to it's 6 invincibility frames. You can attack during MKs last frames of any attack you want to - Fortress will always win and deal good damage. And what's also important: It hives you a save recovery. Just play it smart. All you need is to time it right and MK won't be able to gimp you. It works even on Lylat Cruise and Rainbow Cruise, so MK won't even be able to counterpick Bowser. And a grab release at the edge gives Bowser a free fair, which is no less than a guaranteed KO in ~90% of the cases, even with good DI (I don't know yet, what's the minimum required % with perfect DI).
The other move I find very useful was the Flame Breath, even though it's very situational. The thing is, that either the Fire Breath or the Fortress will beat the Tornado if you use it fast enough. If MK is too close, it won't work but you can completely Shield it and use UpB very quickly to punish him.
I already figured out which of Bowsers moves beat MKs foretress.
Nado (approach) -> ftilt, Fire Breath
Nado (close range) -> shield to Fortress
The best thing is that if Bowser powershields MKs attacks, it's in most cases either a free Klaw or a free ftilt / dtilt. He can Shield dmsash (the only reliable finisher MK has against Bowser) and gets a guaranteed 20% from the Koopa Klaw. And 20% is about 1/4th of the dmg MK can take against Bowser. Every other move that follows might already be too much for MK, especially one of Bowsers smash attacks.
And of course I will also cover the grab release CG, that makes FD a potential counterpick. If you grab MK on the one side of FD @80% it's a guaranteed KO, since you can fair him off the screen after releasing him at the edge. In other words: All that Bowser needs to KO MK on FD is to land two Koopa Klaws, one Fortress and one Fire Breath to bring him to 80% and then he has to grab him (I'm working on grab options and setups atm to see how I can find effective options to grab MK).
Something, that's very important to me: You can always force MK to play on Final Destination with a lot of characters. Why is this?
Because on Castle Siege you can kill him without even dealing dmg to him. The 2nd stage is the key obviously, as you can just jump release him off the screen and there's nothing MK can do. Bowser just has to regrab him release him and regrab him again until he's KO.
That means, that the MK either has to ban FD, which means 0 death on Castle Siege or KO @80% on Final Destination.
Bowser has the advantage over MK on either stage. I haven't looked into other stages yet but I'll start working together with other Bowser players: Vex Kasrani, Flayl, MrEh and BurtonEarny.