So if frisk does a genocide run, after they oof all of the monsters in the underground except for niko, niko comes out and replaces sans as the judge, and her stamina is basically endless, she says "we'll be here for the end of time, suffering together. I hope your happy you demon.." and starts attacking frisk, until they reset and start the world over, then the rest of the monsters will come back, as well as niko, but niko will remember the genocide run and have a grudge. If frisk doesnt reset, They'll literally be there forever, fighting. here is some STRONK facts about niko: - She can lift 200 pounds - She has some monster DNA in her, so she can learn both Monsters magic and Humans magic - She can teleport pretty much anywhere if shes been there before - Her soul trait is Passion, she will do anything for her loved ones