Board Thread:General Discussion/@comment-26680716-20160501054031/@comment-38451037-20190417230316

Billybobjoe111 wrote: "Could be?" Dont you mean it is? Megalovania is Sans' theme period. Got offical proof?

Joke aside, yes, Megalovania is the theme that plays when you fights Sans, and therefore that's his Battle theme. The fandom did use it for AUs where other characters fill his role as Judge, but all and all, it's the theme of Judgement.

Chara, however, have no theme in the official soundtrack; so the fandom have to settle with either the unused "Star ", or the follow up of Megalovania, "Megalo Strikes Back "