Board Thread:General Discussion/@comment-37750220-20181214063221/@comment-39394247-20190728065229

Maybe because he breaks the game and such... but any other boss at LV 19 would be harder, as KR will quickly reduce your HP to 1. Undyne the Undying would be 100x harder at LV 19 than Sans - one hit is enough to reduce your HP to 1, and I'm not sure if you could ever win either!

[Fight]

8495823


 * But it refused.*