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.
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