I remember the ad campaigns back during the second Twilight movie, New Moon — the one where they introduced the supporting cast of werewolves. And the common identifying trait shared by all the werewolves was that they were all beefy guys without shirts on.

If standing around without a shirt doesn’t work to convince people of his lycanthropy, I suppose that Magical Space Pony can try participating in the other identifying trait of werewolves: “running through the streets doing things“. (As was noted in the MST3k episode 904 “Werewolf“… or “waarwilf”… or something equally absolutely fascinating.) Aroo!