Board Thread:General Discussion/@comment-27317758-20160606193000/@comment-28076630-20160706041011

I mean... there's really no guarantee that Sans is being truthful here. Even setting aside the possibility of sarcasm, Mettaton's ending has him pretty much brainwashing the whole Underground except for Sans - not a big leap for the Annoying Dog to be capable of that last step, no?

Of course, there's also the possibility that somehow under the Annoying Dog's benevolant pome-reign the Underground has turned into a futuristic utopia.