Board Thread:General Discussion/@comment-26680716-20160501054031/@comment-33343984-20180610015316

Well, think about it. If Toby Fox really didn't want "Song that might play when you fight sans" to have any actual meaning why would he make it in the first place? (Although it is confirmed as not being in the game files, Toby Fox still made it [Track #72]) Also notice that it is a sped up version of sans. (which is san's casual theme) (https://undertale.wikia.com/wiki/Sans.) And seeing that it seems faster, more extended and slightly changed seems as it should be his battle theme. And this wouldn't be the first time Toby has done something like this. For example, Papyrus's battle theme is BoneTrousle (https://undertale.wikia.com/wiki/Bonetrousle) is also faster, more extended and slightly changed then his casual theme of "Nyeh Heh Heh!" (https://undertale.wikia.com/wiki/Nyeh_Heh_Heh!)