The Wizard's Apprentice

An evil wizard has turned a local town's residents into household objects. Zorori decides to become the wizard's apprentice to use magic in his pranks. The wizard works them hard for a week and then Zorori discovers the wizard's power comes from his magic rod and he was never going to teach him magic. Outraged, Zorori steals the rod and starts using magic. The wizard takes back the rod and shrinks down Zorori to squish him. The boars take the rod and undo all the wizard's spells, revealing the wizard was actually a tanuki child all along. Based on book 3.