Board Thread:General Discussion/@comment-31252171-20171008174544/@comment-32182236-20171009192544

Battle Against a True Hero doesn't use Undyne letmotifs. A character can have more than one letmotif. If they couldn't, Megalovania could be neither Chara nor Sans' theme, because Chara's theme is Once Upon a Time, as I elaborate more on the post you quoted, and they don't share a letmotif. Frisk? Well, then whose battle theme is Battle Against a True Hero?