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, even if it's just two, they should never be added to this category, unless their only other appearances were brief cameos (e.g. Lolo Purs, Doug Shablowski). Plus, villains that appear in two-parters, perhaps more, cannot count as One-Shot.

They can usually never be Big Bads or Bigger Bads since they are supposed to be minor villains, unless they are Unseen until a big reveal of all the huge things they did, even if it was right at the beginning of the story.

These villains can only be Pure Evil if they do something bad enough in the little screen time they have (e.g Shou Tucker, The Dominator, Rolo Haynes, Ego)