MISCHIEVOUS SPIRIT is a term used to describe a variety of supernatural creatures, such as bogy, PIXIE, GREMLIN, POLTERGEIST, and ELF. A bogy is a mischievous spirit that often takes the form of an animal or a human. A PIXIE is a small, mischievous fairy-like creature from European folklore. A GREMLIN is a mischievous creature that causes trouble for people, usually by sabotaging machines or equipment. A POLTERGEIST is a mischievous spirit that is known for making loud noises and moving objects around. An ELF is a small, mischievous creature from Germanic folklore that is known for playing tricks on humans.