Essentially I'm trying to determine the earliest depiction of a chimpanzee as a Mad Scientist in film or television. Mojo Jojo was a notorious and powerful mad scientist Chimpanzee from Powerpuff Girls.
I can't remember if any of the chimps on Lancelot Link, Secret Chimp were mad scientists. (Dr. Strangemind, for instance.)
Regular scientist chimps would not qualify, but Bonobos are close enough genetically to be included under the "chimp" umbrella. I'll also accept orangutans per their proud cinematic tradition.