Tarbosaurus is the closest relative to the T-Rex and lived in Asia.
While smaller than it's American cousin Tarbosaurus was the most feared predator is Asia. It had shorter arms and more rigid lower jaw than the T-Rex. It had more teeth and it had very poor eyesight.
It appears during The Giant Claw for a few moments. Once to find and chase Nigel and the other to fight the starring dinosaur.