Rudy is the elderly man who threw off Kuzco's groove. He is also a main character in the sequel Kronk's New Groove. He was voiced by the late John Fielder, who was also the voice of Piglet in Winnie the Pooh.
Rudy first appears in the opening of the film when the musical number "Perfect World" stops for a while. When Kuzco encounters him, he blames him for "throwing off his groove", in which a nearby guard expels him from his palace by throwing him off a window. He later appears when Pacha goes to visit Kuzco in his palace when one of his slippers falls on him in which Pacha gives the slipper back to Rudy kindly, but before going to enter Kuzco's palace, he rescues him stuck on one of the banners outside Kuzco's palace in which Rudy warns Pacha to be careful of Kuzco's selfishness of expelling innocent peasants from his palace.
- Rudy was John Fielder's final movie role before his death.