Board Thread:General Discussion/@comment-28032065-20160419130638

So i wonder i you guys found bosses that kick your butt harder than sans and undyne.

You can put any bosses from another video game as long is not from undertale or games made by from software (because even the normal enemies can kill you easily).

Mine was 5HD0W-TP's final form in Borderlands: the pre-sequel claptastic voyage DLC. 