Episode Title:Too Young.Episode Description:When the Earl of Lemongrab (voiced by Justin Roiland) finds out that Princess Bubblegum (voiced by Isabella Acres as a young girl, and by Hynden Walch as an adult) has reverted to being only 13 years old, he tries to usurp the Candy Kingdom throne. Finn tries to use pranks to coax him into leaving. Princess Bubblegum eventually makes herself 18 again so she can re-claim the throne.