=P don't think thats quite what hes looking for Fino, but gotta love kills like that. Not sure exactly my lowest but just this past wednesday i got a grab at 0 near the edge facing the edge for a Dthrow->FAir->Dair->ledge hog =P
Anyway Jarri no list like this has ever been made or even attempted to my knowledge, simply because it is so variable. Your USmash example for instance depends on how heavy your opponents character is, how high the ceiling of that particular stage is, which pikmin you hit with, how cleanly you hit, how many times you've used USmash prior and the number of moves you've used inbetween those previous USmashes. Odds are I'm not even thinking of other possible variables, but that hopefully reiterates KMAY's point that the list while it could be done, would be very situational. The other moves would be even more difficult, needing to account for how wide the stage is, how wide the KO walls are, opponent wiggling, character recovery, what part of the stage you hit your opponent at... I feel perhaps this list would need to be too simplified to be useful. If your just looking for the relative knock back strengths of all the moves, I believe thats fairly accurately been laid out in NC Echo's guide as part of each individual move's description. In short however if your simply looking for kill moves, I'll say that over the past week and a half i've developed very much around the unused USmash kill potential, saving it until i get my opponent to 90%-110% and then taking the for sure KO. While USmash is a great move at any percent for damaging/juggling/etc, i've found that overall keeping it solely for KO use has made me a much more efficient player. This makes it particularly difficult to make "comebacks" against me because never will my opponents be able to have those troublesome stocks that reach 150% and above while chipping away at my own % as I fight for the KO.
I believe USmash is by far the most reliable KO move, and easiest to save up. For that reason perhaps a list of USmash KOs on all the characters on all the stages given various different DIs could be useful, but in general I think a list of KO %s would be mostly unusable.
-True