Just recently I found a true combo that kills early while labing with Fox. Honestly, I don't know if I'm posting in the right place or whether or not I'm following all the rules concerning posting. Although I do really want to share what I found with other Fox mains. If what I found has already been found and documented then my bad, I'll delete this post.
I've tested the combo on Shiek and on ZSS only.
ZSS: 72%-74% kills off the top with 4 hit true combo. 75%-79% kills off the top with 3 hit true combo.
Shiek: 71%-75% kills off the top with 4 hit true combo. 76%-81% kills off the top with 3 hit true combo.
Before I explain those number I need to preface with: I haven't tested the combo's consistency with the opponent DIing or with any other characters. Also, the percents that I've found do true combo and definitely kill if done perfectly, according to Sm4sh's practice mode. So if there is any dispute as to whether or not the practice mode counter can actually be considered reliable then by all means, teach me why it isn't reliable. Lastly, the combo is really strict and actually doesn't true combo unless close to frame perfect.
The combo is falling UAir into a following UAir immediately afterwards. For a lot of Fox mains this won't be surprising because UAir usually follows from most combos (DTilt, UTilt, DThrow, UAir, etc.) What is surprising to me is that at specific percents Fox's UAir combo'd into another UAir actually kills extremely early. Watching professional matches usually shows that Fox doesn't have kill confirms until extremely close to 100% or past it for some moves, his usual kill confirms being USmash, BAir, and UAir. With the true combo I found Fox can kill much earlier starting in the early 70%.
Fox's UAir has two hits, the tail and the leg. From what I understand (and please correct me if I'm wrong I would hate to start flinging around incorrect information) the leg is what actually provides the immense knockback, the tail provides very minor knockback and little to no kill potential. When I say 4 hit true combo, I mean that the Fox has to hit both the tail and the leg in both the falling UAir and the second UAir to get the kill. The 3 hit combo is a bit different though, Fox will not kill if he misses the falling UAir's tail but hits both the tail and leg of the following UAir. Fox must hit both the tail and the leg on the falling UAir, although he only needs to hit the leg to get the kill for the 3 hit combo percentages. From my experience, inside the 3 hit true combo range, it's actually impossible to get a 4 hit true combo. At those percentages the knockback is just slightly too high and it makes it out of reach to hit both leg and tail on the follow up. Vice versa, Fox won't kill if he only manages 3 hits in the low percent ranges written above.
I'd like to warn that I don't believe this should be used "randomly" in neutral. It's very risky because the window for hitting the falling UAir, not only that but it is the farthest thing from being safe on shield and will end up being punished heavily if wiffed. I'd love to see this used as a punish for a missed move or grab. That would make my day.
Something funny I found while testing this, it's actually easier to confirm the true combo and kill on Shiek than it is on ZSS. I'm thinking this is because she weighs more but I'm not entirely sure.
Finally, I really appreciate criticism, questions, and feedback. If anyone wants more specifics on the percentages I have more info, I just didn't want to bore anyone. Thank you!
I've tested the combo on Shiek and on ZSS only.
ZSS: 72%-74% kills off the top with 4 hit true combo. 75%-79% kills off the top with 3 hit true combo.
Shiek: 71%-75% kills off the top with 4 hit true combo. 76%-81% kills off the top with 3 hit true combo.
Before I explain those number I need to preface with: I haven't tested the combo's consistency with the opponent DIing or with any other characters. Also, the percents that I've found do true combo and definitely kill if done perfectly, according to Sm4sh's practice mode. So if there is any dispute as to whether or not the practice mode counter can actually be considered reliable then by all means, teach me why it isn't reliable. Lastly, the combo is really strict and actually doesn't true combo unless close to frame perfect.
The combo is falling UAir into a following UAir immediately afterwards. For a lot of Fox mains this won't be surprising because UAir usually follows from most combos (DTilt, UTilt, DThrow, UAir, etc.) What is surprising to me is that at specific percents Fox's UAir combo'd into another UAir actually kills extremely early. Watching professional matches usually shows that Fox doesn't have kill confirms until extremely close to 100% or past it for some moves, his usual kill confirms being USmash, BAir, and UAir. With the true combo I found Fox can kill much earlier starting in the early 70%.
Fox's UAir has two hits, the tail and the leg. From what I understand (and please correct me if I'm wrong I would hate to start flinging around incorrect information) the leg is what actually provides the immense knockback, the tail provides very minor knockback and little to no kill potential. When I say 4 hit true combo, I mean that the Fox has to hit both the tail and the leg in both the falling UAir and the second UAir to get the kill. The 3 hit combo is a bit different though, Fox will not kill if he misses the falling UAir's tail but hits both the tail and leg of the following UAir. Fox must hit both the tail and the leg on the falling UAir, although he only needs to hit the leg to get the kill for the 3 hit combo percentages. From my experience, inside the 3 hit true combo range, it's actually impossible to get a 4 hit true combo. At those percentages the knockback is just slightly too high and it makes it out of reach to hit both leg and tail on the follow up. Vice versa, Fox won't kill if he only manages 3 hits in the low percent ranges written above.
I'd like to warn that I don't believe this should be used "randomly" in neutral. It's very risky because the window for hitting the falling UAir, not only that but it is the farthest thing from being safe on shield and will end up being punished heavily if wiffed. I'd love to see this used as a punish for a missed move or grab. That would make my day.
Something funny I found while testing this, it's actually easier to confirm the true combo and kill on Shiek than it is on ZSS. I'm thinking this is because she weighs more but I'm not entirely sure.
Finally, I really appreciate criticism, questions, and feedback. If anyone wants more specifics on the percentages I have more info, I just didn't want to bore anyone. Thank you!