In "I Got a New Aptitude", Adam Lyon ran free, to pursue his dreams and Mr. Mandrill made the mistake of saying "Look out world, there's a Lyon on the loose", causing an actual lion to spontaneously break loose from nowhere and attack him.
At the end of the episode, Benny Two Tooth said "And I'm not lying", getting him mauled by the lion, since his vocalization of "lying" sounded like "lion".
During the credits, the lion sat in a fancy red robe, by a fireplace in a library, looking very sophisticated. He gave a Public Service Announcement to the audience, explaining how lions didn't really act the way they were portrayed in the previous cartoon, and they only had the lion act that way for comedic purposes. After that, he was mauled by Benny Two Tooth in the same fashion he mauled others.