A Humanzee named Oliver appeared on Japanese TV with fraudulent promotions picturing him as a miniature and hairy human being. Oliver's trip coincided with a concert promotion of the rock 'n roll group The Monkees and he was presented on Japanese television shows with Mickey Dolenz spouting inaccurate scientific observations.
It was claimed he was given genetic testing by the Japanese promoters. Some Japanese results, later proved false, held that Oliver had 47 chromosomes. Some anthropologists observing Oliver's head, nose, ears, and preference for bipedal walking asserted the possibility that the chimp was a hybrid.
Alas, it appears that this particular Humanzee (also known as the Chuman or Manpanzee) was not the hybrid but just a chimp with a tendency to walk upright. The verdict is still out as to whether Kelsey Grammer, Ed Asner or Robin Williams are Humanzees.