Sidon

Rhydon is a large, gray, bipedal Pokémon with features similar to both dinosaurs and rhinoceroses. It has narrow, red eyes and two fangs in its upper jaw. On the tip of Rhydon's snout is a cream-colored horn, which is smaller on a female than a male. There are several other spikes and projections on its head: on top is a spike that curves forward, two triangular points resembling ears on the sides, a wide, wavy crest under each ear, and spiky ridges on each cheek. It has a cream-colored abdomen divided into strips by thin divots. A rocky plate on its chest slightly overlaps its abdomen. There is a row of spikes down its back and they have a long tail with thin, black stripes.

Rhydon is a physically powerful Pokémon. It is recorded as being able to topple buildings with a sweeping blow of its tail, and its horn is able to bore through solid rock and shatter diamonds. Its armor-like hide protects it from heat and physical blows. It is stated to be capable of passing unscathed through streams of magma and withstanding a direct blow from a cannonball without being harmed. However, because of this tough hide, it is insensitive. Despite its well-developed brain, it can be forgetful. Rhydon lives in rough terrain.

(Source: Bulbapedia)