After six seasons of super-powerful villains just letting the heroes win, the Mane 6 meet a tougher and smarter one: Sans, the lovable comic relief skeleton from Undertale. He does stuff that the other villains don't. As usual, Twilight's friends are rendered useless, and Sans' tactics are more than a match for Twilight's lack of combat training and reliance on friendship. Unlike the FiM villains, he doesn't just let her win…