The Emperor's New School: Guaka Rules

When the class takes a field trip to the museum, they learn that the real heir to the throne isn't Kuzco -- it's Guaka. Since Guaka does everything Kuzco wants, Kuzco assumes Guaka will still let him still act as emperor, but instead Guaka starts ruling with an iron fist (just as he's seen Kuzco do). Malina thinks this is all a bit fishy, so she and Kuzco take it upon themselves to go on a Da Vinci Code-like excursion and find out who the true heir is. Meanwhile Yzma is delighted to have a new emperor for her to destroy.