One-Shot Villains who appear only in a single part of any episodic series (cartoons, anime or TV shows etc). This kind of villain is a staple of franchises such as Super Sentai/Power Rangers where every episode features different villains for the heroes to face. They are still considered One-Shots if any previous and/or later appearances are background, minor and/or cameo.

Note: DO NOT put villains from books, movies, comics and/or video games in here. In addition, if these villains appear in more than one episode, they should never be added to this category, unless their only other appearances were brief cameos.