Tyrantrum is a brownish red Rock/Dragon typed Pokémon. Tyrunt evolves into Tyrantrum at night, like how Amaura evolves into Aurorus. It is probably based off of a Tyrannosaurus Rex in the real world. The underbelly is gray with white borders, and it has a long tail with two orange spikes near the tip.
Before its extinction, wild Tyrantrum used to live 100 million years ago, when its strong jaw conferred its status as an unmatched predator. Since it was considered invincible in the ancient world, it behaved like a king.