*to be updated with full roster, later today hopefully*
These numbers are with NO DI, "controlled", training mode, FD. (See webm below for reference). This is with both hits connecting. I tried each character 20+ times to make sure the numbers are accurate as possible, but of course there is always human error.
Utilt > BF combos earlier than these percents, so "kill" is determined by the earliest % that lightning appears while registering as a true combo. DI throws off these numbers significantly, so please do not expect to be killing Bowser off the side like this at 96, or you're gonna have a bad time (and possibly eat a Bair for your troubles).
Numbers are before utilt is initiated.
Characters marked by * have been hit below the stage with Uair 1. This can happen when you edgeguard these characters or if they are too close to the ledge, and it often causes you to miss entirely. Hitting them below stage changes the numbers since their trajectory is much more horizontal (Zelda dies at 76 or even lower when hit below, but not until 77 otherwise (webm below)
Lastly, some of these windows are very lenient, and waiting makes the difference between a KO or not. Especially characters like Diddy, inputting bouncing fish immediately at 80 will not result in a KO, but waiting ~20 frames (extremely rough estimate) will result in a KO since he was further off stage when BF connected. In fact, most of these numbers came down to how long I waited before inputting BF, that's how lenient most of these windows are.
Percents
WebM