Misdreavus

“It likes playing mischievous tricks such as screaming and wailing to startle people at night.”

— Pokémon Gold

“It loves to bite and yank people's hair from behind without warning, just to see their shocked reactions.”

— Pokémon Silver

“It loves to watch people it's scar­ ed. It frightens them by screaming loudly or appear­ ing suddenly.”

— Pokémon Crystal