I'll just copy paste this over from the other topic on my Aerial Fortress shenanigans if you guys are interested.
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Now I know you guys probably have no reason to ever use Aerial Fortress as an attack option as in a high level match it will be very unreliable to hit however on a successful punish especially on mid height to the heavies off a short hop you can use Aerial Fortress for an easy on average 22%-29% damage. And on flat stages you can possibly spin on over and grab the ledge although you run the chance of falling to your doom anyway. Or get punished. Or land on a platform and be safe. But it's a +25 damage which is always great.
Would I recommend it on a speedy character like Sheik or ZSS? No. Small characters? You'll miss so no. But heavies like DDD, Ganon, Ike and others? Yes.
Once hit a player is gonna take a chunk of damage and they can DI all they want because it won't matter.
See Bowser has combos!
Also worth noting that since the first hit is strong that's why it can clank out stuff like Villager's Bowling Ball. That first hit dealing 12% damage.
On very rare occasions it can kill with the first hit in the like 180%ish range but it'll never happen since the next hits happen immediately and have fixed go nowhere knockback.
Tested the entire roster. Running Short Hop Up B will hit everyone reliably except for Diddy Kong, Mr. Game and Watch, Duck Hunt, Pikachu, Greninja, Jigglypuff, Kirby, Meta Knight, Olimar, Pacman.
You can hit Diddy and Pac sometimes but it isn't worth it since you can whiff easily.
Free 20%-30% damage on a confirmed hit though. Percentage doesn't matter and you can't DI out of it. Well you can. But not after taking the bulk of the damage.