The battle music used is an actual old music by Toby Fox: http://sleepytimejesse.bandcamp.com/track/megalo-strike-back This version is based on a OC by reddit user /u/Sparrows413 https://www.reddit.com/r/Undertale/comments/3txu92/oc_an_alternative_take_on_papyruss_genocide/ the begning is a bit is the full spech and the end dialogue is by him.