Titanosaurus

Titanosaurus is the secondary antagonist in Terror of Mechagodzilla.

He was a giant aquatic dinosaur that was controlled by mad scientist Shinji Mafune. Titanosaurus was sent to Tokoyo, where he battled with Godzilla, the King of the Monsters. Mechagodzilla soon arrived and the two teamed up against Godzilla.

The INTERPOL Agency soon realized that Titanosaurus had a weakness: supersonic waves. Katsura, Mafune's daughter who was in control of Mechagodzilla, killed herself, so the robotic titan was left without control, and Godzilla destroyed his robotic counterpart by twisting it's head off, while Titanosaurus was blasted with several supersonic waves and Godzilla's atomic rays, knocking him into the sea.