Board Thread:Questions and Answers/@comment-36657572-20180824045103/@comment-38496509-20190214045302

What I think happened is that, after Mettaton NEO was killed in the Genocide route, he became a ghost again and did... whatever. If Nabsablook was killed, he would still be a ghost, just... I don't think you CAN kill ghosts. I saw a Undertale comic dub a while ago about the integrity soul, who died falling into the Underground. She became a ghost after a while and was taken under Toriel's care. She later learned to fly and... fell, but she was ok. Fire didn't burn her and she wasn't hurt after falling [mostly because Sans unvolentarely went with her and he saved her with that nifty Bad Time power]. Toriel said that she could eat human food, monster food, and a speacial ghost food. I think that ghosts can't be killed and the game basicly says so. Thats what I think.