Ok, so,
Bowser Math Time!
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Bowser Frame Data)
Bowser's dash grab comes out on frame 10. To my knowledge, it is the dash grab that is used for his chain releases.
Shield comes out on frame 1. Equally, then, you can start a spotdodge on frame 1, but the laggiest spotdodge won't have invincibility frames until frame 3.
So, if we compound that, it would take 33 frames to perform a spotdodge from the moment you get ground released.
Bowser can dash grab you after 10 frames, so compounded it means that it would take 30 frames for Bowser to perform a dash grab from the moment he ground releases a character.
So, in order to remove Bowser's chain release completely, he needs to have a grab release animation length of 23 frames. This way, Bowser's dash grab will always come out on frame 33, just like the laggiest spotdodge (ironically, Bowser himself is the one who has that spotdodge...). This means no character will ever be able to get chain released.
So, this means Bowser would have 7-10 frames of leeway to work with, depending on whether or not his follow-up attack can be shielded or not and also depending on which character you're up against.
Remembering that the opponent's shield will come out on frame 31, what follow-ups does Bowser have with 7-10 frames of leeway?
- Jab (Hits on frame 6, will hit on frame 29. Guaranteed against all characters pending range.)
- Utilt (Hits on frame 8, will hit on frame 31. Might get shielded.)
- SideB (Grabs on frame 8, will grab on frame 31. Guaranteed against all characters.)
- UpB (Hits on frame 6, will hit on frame 29. Should be guaranteed pending range.)
- Meanwhile, if your opponent is slow or doesn't know the match-up, you could Ftilt, Dtilt, Dash attack, or Dash regrab. Those all come out on frame 33. One would hope that your opponent wouldn't let you dash regrab after the first... but if they do, they deserve it. That'll learn 'em! Like DI'ing Falcon's throws to prevent chain grabs.
- You could also play mindgames on your opponent, because if you expect a spotdodge will take place after the release, just use neutral B instead. It'll be out before their spotdodge ends and you can hold it to punish them when their invincibility frames are over. Not bad, right?
- A DownB could also be pulled off, circumstances permitting. It'll hit on frame 34, so it's a risky maneuver, but it could work if you predict your opponent will shield and jump out of the shield upon release.
So, yeah. That's what I got.
What do people think? What do the Bowser mainers think about their options?
23 is as low as Bowser's grab break can get without permitting the chain regrab. So there's no point in asking for it to be any lower than that. I think there are plenty of options left to Bowser with a 23 grab break. And given how he can't combo out of any of them and none of them are reliable kill moves, I don't see this as being any different than the Falcon throws > stuff that SketchHurricane mentioned.