2. Tyranitar
The Tyrannosaurus Rex is the King of the dinosaurs, and he owes it all to his massive size and bad attitude. Tyranitar, like the T-Rex, has a penchant for bad behavior. The major difference between the two? Tyranitar is a lot scarier. You know you're dealing with a bad-ass when its first form, the tiny Larvitar, is said to be able to devour entire mountains. What is said of Tyranitar? Well, other than its armored hide being incapable of being harmed and being able to crumble mountains with one hand, this Pokémon is stated to have an insolent nature that makes it completely apathetic to others. How lovely, a creature with the ability to care, yet it just plain doesn't give a s***. When Tyranitar rampages, it destroys landscapes and buries rivers, causing maps to have to be constantly redrawn. It has the power to change the landscape at will, and can whip up sandstorms with the wave of one Cadillac-sized finger. You thought Onix's ability to cause natural disasters was bad? Onix is but a meal to the mighty Tyranitar. So to review, we have a creature that eats mountains, destroys landscapes, loves wrongdoing, and cannot be hurt. Tyranitar surely would have been the most terrifying Pokémon of all if not for our next entry predating it.