Oona's Gorilla is the place name given by Oona. He only appeared in: The Lonely Rhino! in the shop segment.
Oona's Gorilla has light fluffy hair and the top of his face. He looks really upset all the time, but there might be a small possibility that this gorilla and the sad gorilla from the storybook segment from Jungle Doctors in the pilot episode. Oona's Gorilla seems to be really sleepy!