The Vamporilla is a cross-between a vampire bat and a gorilla. It lives inside a padded room opposite the waiting room at a laboratory, and it is violent enough to kill any intruders. It is never revealed how this creature came into existence, but is most likely one of Dr. Eeek's experiments, as other hybrids (such as dog/humans) have been created by him. Seen in The Deadly Experiments of Dr. Eeek.
- though it most likely is the ape from the cover in the book it's a gorilla but on the cover it's a chimpanzee