Zuruggu

Scraggy is a bipedal, lizard-like Pokémon. Its oval eyes are set to the sides of its head, and its teeth appear to be constantly exposed. There is a small red scale on its yellow head. Below the yellow portion of its head, its body is cream-colored with thin arms and a red, scaly belly. It carries its loose, yellow skin around its legs, resembling trousers, which garner them more respect the saggier they are. Some of the loose skin seems to trail off to form or cover a tail.

This pelt is rubbery and can be raised to its neck to reduce the damage it takes from attacks. Scraggy is easily engaged in battle, as it will attack anyone that so much as meets its gaze with a headbutt from its thick cranium. The skull is extremely hard. They are known to take pride in their sturdy skulls, causing them to suddenly headbutt everything. However, the weight of its skull makes it hard for Scraggy to balance itself. Scraggy travel in small groups, walking around lazily. Scraggy is said to evolve into Scrafty once its skin is completely stretched out.

Evolution
Scraggy evolves into Scrafty.

(Source: Bulbapedia)