Tyrantrum

Tyrantrum has made its debut in Pokemon X and Pokemon Y. He is the evolved form of Tyrant, and the only way to evolve from Tyrant is in the daytime, as well as its level being at 39. Tyrantrum was based on Tyrannosaurus Rex, a top preadator of the final era of the Dinosaurs. Tyrantrum along with his pervious form, are the first Fossil Pokemon to be a Dragon-Type Pokemon.

The only way you can get Tyrantrum was to get the Jaw Fossil first, then you can revive his pervious form from that fossil. Then once you revive Tyrant, you can train this Pokemon, until you trained it hard enough to evolve it into Tyrantrum. This Pokemon's ability will allow moves that bites the opponent to deal even more damage. It can also bite thick metal plate like it was paper.