Mr. Hollis is Bert's uncle and businessman. Mr. Hollis is not pleased with the fact that an elephant rivals his nephew, but he inquires the jungle doctor for assistance. To get Dr. Jumbo he writes a cursed prescription and Jumbo begins to lose his memory. Unable to remember even the simplest things, Jumbo would like to draw from the contest. However, he is prevented by his friends and go to look for assistance from a dinosaur.