ニドキング

Nidoking is a large, bipedal, purple mammalian Pokémon with distinct reptilian features. It has narrow eyes, large, spiny ears, fur-like tufts on its cheeks, and a short snout filled with pointed teeth. There is a long, venomous horn on its forehead and a ridge of spines down its back. Gray plates cover its chest and belly, and there is a gray, rounded spine on each elbow. Each hand has three claws, while each foot has only a single hoof-like nail. It has a long, powerful tail. Nidoking is a male-only species.

It is said that Nidoking's tail is capable of toppling a metal transmission tower. Nidoking uses this tail to smash, constrict, or break the bones of its prey and enemies. The tail can also be swung to create distance between it and its foes before Nidoking charges. Its steel-like hide adds to its powerful, rampaging charges. Nidoking's horn is powerful enough to crush diamonds. Nidoking is known to be very proud of its own strength. When Nidoking goes on a rampage, it becomes impossible to control. Only a Nidoqueen that it has lived with for a long time can calm it down from its rampages. As shown in the manga, Nidoking has strong acid within its claws. Being the result of evolution via an Evolution stone, Nidoking is rarely found in the wild, though they can be found in savannas and plains.

(Source: Bulbapedia)