Villains who only appear in a single episode of any episodic series (cartoons, anime, TV series, etc). This kind of villain is a staple on Super Sentai shows, where every episode features a different monster for the heroes to face. They are still considered one shots if any previous/later appearance(s) are background, minor and/or a cameo.

NOTE: Do not put villains from books, movies, comics, or video games on here.