Actually Werewolf

Friends at a Halloween costume party groan when they learn Wally is coming: since he turned into an actual werewolf about a month ago, he has become an unbearable know-it-all. Wally lectures a guest dressed as Dracula about the historical Vlad, declares the paper bats and peeled-grape eyeballs inaccurate and offensive, warns everyone about green-skinned witches on behalf of his witch girlfriend, and scoffs at a newly arrived mummy. When one friend finally tells him he can leave, Wally admits that werewolf life has been lonely, with people afraid of him and dogs rejecting him, and that he only wanted to spend his biggest holiday with his old pack. The friends apologize and promise to learn more about his culture, until another guest shows up in a matching werewolf costume and Wally can't resist one more correction.

The sketch aired in Studio C's Season 17 Halloween special, A Secret Scarecrow, where fan episode guides list it as "Werewolf Has a Complex"; the official YouTube upload is titled "Actually Werewolf".