Zoey 101 (2005)

S1E23 The New Kid

Title: The New Kid Plot: A fresh face shows up at the academy—Oscar, who boldly proclaims himself an emperor. His admiration for Kuzco leads Kuzco to suspect that Oscar might be Amzy in disguise. Determined to uncover the truth, Kuzco embarks on a mission to prove his theory and unearth Oscar's true identity.