Its immense jaws have enough destructive force that it can chew up an automobile. It lived 100 million years ago.
– Pokémon Y Pokédex
Tyrunt is one of the fossil Pokemon in Gen 6. It’s in the family of the first and so far only Dragon-type fossils. In X/Y, it has a exclusive ability Strong Jaws (it has since been given to other Pokemon), which increases the power of biting moves by 50%.
It’s based on a young T-Rex; the X Pokedex entry talks about it throwing a tantrum when it doesn’t get what it wants, like a spoiled prince (its species is Royal Heir Pokemon).
The Pokemon Y Pokedex says it lived 100 million years ago, but real-life T-Rexes lived 68–66 million years ago. Does this mean the Pokemon Universe is ~35 million years into our future??