Kim Possible and Star vs. The Forces of Evil: The Wicked World of Descendants is a one-hour crossover television special featuring characters from Kim Possible, Star vs. The Forces of Evil and Descendants.
When Dr. Drakken, Shego, Ludo and Toffee are conspiring with Maleficent to take over the world, Star and Marco join forces with Kim Possible and Ron Stoppable to stop them with the help of the offspring of Disney Villains, Princesses and Princes. The subplot has Rufus and Pony Head joining the Lion Guard, led by Simba's son Kion.
Kim Possible creators Bob Schooley and Mark McCorkle, and Star vs. The Forces of Evil creator Daron Nefcy worked closely with the crew of Descendants to adapt the characters to work together. The casts from those franchises reprise their respective roles.