I love the Google Translate text from the Pokemon X/Y website.
Pokemon Chigorasu evolved, Gachigorasu.
I am proud of invincible in the world of 100 million years ago, had reigned as king. The biggest weapon, a big chin that would tear bite like paper in the thick iron plate.
Technique of rock type, "headbutt of double-edged". You can put the power of the whole body, to attack in the head butt. Boasting a tremendous power, but the damage that I receive a reaction is large. To assess the use far from, and let's use it when it comes to the crunch.
Also here's a rough size estimate of a Tyrannosaurid that's about the size of Tyrantrum for those who are curious:
Edit: Holy shoot from the Wikipedia article of T. rex
Feathers gone too far bros