Corrins combo game though. I found that Dtilt> Utilt> (optional) Utilt> Uair works. after the Utilt, Nair also works and can go into a Fair 
Falling Nair> Nair> Fair works as well (dont buffer it) 
Fair> Footstool> Dair works, and if they land near you, you can follow up with some things
Dtilt> Jab (first hit, dont know about second hit)> Grab works.
Counter can kill at 70% (seriously, I have a replay of me killing Bayonetta at exactly 70% lol)
Her Nair is pretty amazing and so is her Fair. If you get a falling Fair, you can follow it up with more Fairs.
Uair can kill
If you're fast enough and close enough (you can be actually pretty far and still catch up) after Neutral B you can follow up with a Fair> Uair/Fair.
This is all I remember for now but I have some replays showcasing some of her combos that I will be putting up on youtube
UpB can be a follow up after Uairs or Fair (I think Fairs) and it kills.
The only way you can win with Corrin is if you choose waifu costume
Falling Fair at super low % combos into a Dtilt Setup
at 0% you can get Dtilt> Utilt> Fair> Fast Fall Uair> Uair for a free 55% on Bowser. Timing is kind of tight though. This combo wont work if you start with a Fair, and you can get a possible Up B at the end of it.
Side B stick> Kick> Uair works for a quick 30% or so.

Corrin has a hitbox when she charges her Smash Attacks.