Stan might actually be a werewolf, It’s a guess that is out there but very possible. Here’s why. On the episode Dipper Vs Manliness. It shows Stan grows body hair at immense speeds. Which isn’t quite normal. Many take it as a joke but think about it. Also if you pay attention to the walls of the mystery shack some are scratched and ripped up. Almost claw like. Concidence? I think not. *LOOK AT THE PICTURE ABOVE*
Lots of ppl say Stan is a werewolf but I don’t quite agree. Who cares. Check this out.