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The Rhinosaurus is a giant, genetically engineered rhinoceros that was created by Cameron Winter's company, S.C.A.L.E. It was one of the monsters faced by Zilla Junior in S.C.A.L.E.'s arena. In defense of Nick Tatapolous, who had also been trapped in the ring, Godzilla fought the creature, knocking it out with a powerful tail whip. It was featured in the episode Clash of the Titans.
Another creature enslaved by Maximillian Spiel, the Rhinosaurus was to be Zilla Junior’s ultimate challenge after he 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 Junior to properly fight. As the Rhinosaurus charged, Zilla Junior 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.