After Timmy, Chester and A.J. finish watching an episode of Crash Nebula, they try to act it out. To make things more interesting, Timmy wishes for an alien, but to his surprise he is brought a real one, the prince of an actual planet called Yugopotamia, named Mark Chang. The alien prince captures Chester and A.J. (who don't know he is a real alien). Mark also falls in love with Vicky. since Yugopotamians love everything that humans despise. Timmy must find Mark's parents so they can take him back to Yugopotamia before Chester and A.J. find out the truth!