Gangar

Gangar is a dark-purple, bipedal Pokémon with red eyes, pointed ears, a broad grin, and spikes along its back and head. It can hide perfectly in shadows, absorb surrounding warmth enough to lower the temperature nearby, and has been shown flying and possessing people or other Pokémon. Mischievous and sometimes malicious, Gangar enjoys practical jokes and curses but can be loyal to a Trainer who treats it well.