Another creature enslaved by Maximillian Spiel, the Rhinosaurus was to be Zilla’s ultimate challenge after the monster king was kidnapped. The two went at it with Elsie and Nick stuck in the middle. If things weren’t against the reptile enough, Spiel unleashed the Giant Water Beetle and started firing upon the creature with his own energy beams. While H.E.A.T. did help a little, it was Craven whom knocked out the laser beam, allowing Zilla to properly fight. As the Rhinosaurus charged, Zilla swung his tail as if a bat. In one quick blow, the Rhinosaurus was either killed or unconscious.
The Rhinosaurus did not posses any special abilities, for it was merely a titanic rhinoceros. However, the Rhinosaurus was still a force to be reckoned with, being equipped with thick, durable hide and a massive horn.
- The Rhinosaurus is speculated by some to be the American counterpart to Baragon.