Maybe there's a limited number of voice actors available. Maybe monster costumes are really expensive. Maybe one particular Dragon is beloved by the fans. Whichever it is, our heroes will always run into the same henchmen no matter who the Big Bad
is. Up for grabs.
- In the first Power Rangers movie Ivan Ooze kicks out Rita and Zedd, but keeps Goldar and Squato around to serve as his henchmen now.
- The trio of Finn, Ratso, and Chou from Jackie Chan Adventures. Valmont, Shendu, Draco, whatever. Jackie will still run into Finn, Ratso, and Chou!
- Spencer Smythe in Spider-Man: The Animated Series. In theory he left the employ of the Kingpin on good terms with Spidey (who told him how to save his father, after all), but as soon as he gets hired by Alisha Silver (daughter of Silvermane) it's the same old story.
- To a lesser extent, Jaws in the James Bond movies. The real reason he reappears is because the fanbase loves him, but what's the reason in-universe?