Here's my thoughts on Corrin's Up B recovery; it's got the height of Ganondorf's recovery, if not just a little bit less, but what it lacks in vertical recovery distance, Corrin gains for horizontal recovery distance and some power (as well as being able to be followed up by F-Air). It's somewhat of a respectable move and is just one of many quips Corrin has that are somewhat decent.
As for his Neutral B, that thing is broken more than you can think. Just an uncharged projectile from that is enough to stun your opponent long enough for the second part, the bite, to fully charge and hit them, and there's nothing the opponent can do about it! It's a free high-damaging move that is also a great kill confirm. At first I thought I'd compare it to Mac and Dorf's attacks, but knowing I don't need to fully charge the projectile just to get the same advantage, it makes me think that this attack is the easiest to hit opponents with in terms of the more powerful attacks. The only problem is, is that it's very punishable if blocked by a shield.
This is kinda why I like Bayo tbh. She has all the tools to make DI reads and it's this huge option tree that requires a ton of player awareness vs. like, IDK, the characters I play perhaps (moreso like, Cloud lol).
I'm seriously thinking of learning this character only because I feel like if I master her, I'll be able to do great things and it'll just make me better at reacting to DI and stuff.
Just know this great combo: Witch Time > any Smash Attack > any Smash Attack again. It's fun!
I recommend using her B-Air instead of her Up B in the combo shown from the presentation. I believe B-Air has enough reach to successfully hit after both Side B aerials connect to the opponent. This might have potential for a kill setup if it actually works out.
But if I were on a teams with her, I'd use someone with her frame data (or better) and yet more power when she uses Witch Time. Candidates include:
But the four characters that I'd recommend the most out of would be:
So straight up, Ganondorf has extremely powerful attacks that hit hard, really hard, and if he's in the field with Bayonetta, what would likely result after Witch Time is used is that the opponents are dead, plain and simple. The opponents would probably be around 80% in death from one team combo, or if Ganondorf is placed right, the opponents will be dead just by one D-Smash from Bayonetta into his own reversed Warlock Punch. Farfetched, yes, but with Bayonetta, he's one powerhouse to be paired up with and actually becomes viable in doubles.
With Little Mac, he has some good frame data, but lacks in the ability to hit with aerials. However, considering the opponent is low enough and that F-Smash from Bayonetta is a thing, Little Mac has some leverage to hit with his own powerful attacks with quick succession to Bayonetta's. And if Mac has a KO Punch ready, the opponents will just be dead quickly.
With Mr. Game and Watch, no matter how random his Judge can be, he has the chance to actually hit with his 9. Combine that with his decent aerials and his N-Air, and you have a smoking character that can work well with Bayonetta, especially if Bayo can send opponents to him and basically play Pong with him. While unlike the other characters, who can have guaranteed KO setups alongside Bayonetta, Game and Watch can help her juggle instead.
And finally, Ness, this boy wonder has some powerful attacks and one slow attack that barely ever sees the light of day, which is his PK Flash. With Bayonetta's Witch Time, PK Flash is going to be one of, if not the most, deadly attacks coming from any character in the game in teams with her. Combine this with PK Fire usage, F-Smash all over and high combo potential, Ness is one of the four deadliest characters to use with Bayonetta.
This is just theory, but in doubles, a lot of characters and her make for a great team.