The Emperor's New School

Kuzco faces his first threat of losing his position as Emperor when he struggles in P.E. and his teacher threatens to flunk him if he can't win a race with Kronk. However, Principal Amzy (who is really Yzma) tells Kronk to turn Kuzco into a turtle so he has no chance of beating Kronk, but instead, Kronk gives Kuzco the wrong potion and he ends up as a rabbit.