Mechalodon

The world has always believed that dinosaurs had become extinct, but in fact the few that managed to survive evolved to the point of becoming highly intelligent beings. They built a ship and before they leave, they erased all evidence of them from the earth. They built their own empire on another planet now known to them as Nexodon. living in an extremely futuristic way, they decided to modify their own bodies, becoming cyborg dinosaurs. "the flesh rots, but the machine updates itself" they ended up discovering that planet Earth was in terrible condition and that a large part of the inhabitants had died, the sovereign of Nexodon, decides to send Mechalodon and another group of cyborg dinosaurs to take a look at the planet and report the conditions of the planet to him, so that they could reclaim the land and make it their second home.