This dinosaur is not the same size as the regular pachycepholosaur. It is about triple the size! Not made by LEGO.

A pachycephalosaurus is a normally peaceful dinosaur that grows irate and violent during mating season or when its herd is intruded upon by potential predators. The dinosaur's skull has a distinctive dome-shaped crown surrounded by numerous bony horns - this, combined with the dinosaur's powerful, compact neck, allows it to make battering-ram-like charges capable of inflicting great damage. Pachycephalosauri grow to a length of 15 feet and weigh 1,400 pounds.