In my opinion, Yamask is one of the creepiest pokémon ever. Don't go all provey-wrongy on me, because, like I said, I just my opinion. Think about it, Yamask's Pokédex entry says that it's the spirit of a dead person. DEAD. PERSON. Creepy, right? Imagine carrying the spirit of a person around with you. What makes it even more creepy and/or sad is that it's mask thing is the face of what it used to look like. Ew.