Hey guys been in the lab today trying to lab out footstool combo off of d-air. And I think I may have the exact steps required to execute it. Now first thing if you miss and you don't do the full hope recoverable d-air to up-b your going to die. So here are the steps:
1. the d-air must hit on the lower part of its hit box, either side of the lower tip is ok, yet it cannot hit on the sides of corrin and they must be brought down around corrin's feet.
2. Then as your falling with them and before they pop out DI horizontally towards the direction they will pop out from d-air.
3. Buffer or spam jump for when they pop out of d-air. while holding the aforementioned DI.
4. And I believe if you did these steps correctly you shall laugh as they are footstooled to their doom.
Now please by all means help lab this further, and confirm my findings . This was a very base, and rough labing of the tech. I Labbed this with ganon, mario, and dr. mario. I chose ganon initially because he is large and the AI recovers low, and then tried mario for a more rounded character size, but found it annoying to get the lower hit as his AI recovers high most the time, then switch to Dr. mario hope with his poor recovery it would be easier to force him to go low. The biggest problem I've face in addition to the AI always recovering high (really annoying to get above and get a low hit for testing when they do this), is trying to read the side they will pop out from as you fall with them with d-air. Maybe its easy and i'm missing something. Really I'm putting this out so we can have this labbed as a community, and pool our knowledge together. Hell maybe if we all get this labbed we can do some d-air corrin ken combos off this (any good way to combo into d-air?)
Edit** Added notes: after further labbing this works, but with a little more twist besides the earlier mentions. One it seems you can't hit all the hits and get the footstool, as d-air carries them further up corrin for more hits. In fact 2 hit of d-air seems to be the most optimal, but ive gotten it on 2-5 hits d-airs. Also the percentage and or floaty-ness of the character may influence how far up corrin they go per hit. All in all this is making it look less useful than FH d-air recovery gimp. It seems almost impossible to combo into a footstool able d-air as you can't hit all the hits of d-air . Really what I can maybe see it used for is if you hit a low target off of the FH d-air gimp, and then footstool them to gimp even the best of recoveries (i was gonna say to gimp someone like villager, but from testing villager kind messes up our d-air with balloons..... we hit one and fall past). In TL;DR: in full theory they need to be at corrin's feat when they pop out, and not at their chest were they end up after multiple hits, then with the di to the correct pop out, this works as a guaranteed footstool.