>>47375838Horror movies. I feel that he is in a similar situation to Miko-chan (pic related) where he can see all kinds of ghosts, including horrible creatures that would attack him if they realized he can see them, so he constantly does his best to ignore them and endure the fear (and be around ghost Pokemon that can protect him). That's why watching horror movies would help him release the accumulated stress by showing fear at the horrible creatures that only he can see, making them believe that the movies are what scared him and not them.
