Its boulder-like body is extremely hard. It can easily withstand dynamite blasts without damage.
Once it sheds its skin, its body turns tender and whitish. Its hide hardens when it's exposed to air.
It sheds its skin once a year. The discarded shell immediately hard ens and crumbles away.
It is capable of blowing itself up. It uses this explosive force to jump from mountain to mountain.
Its rock-like body is so durable, even high-powered dynamite blasts fail to scratch its rugged hide.
— Pokédex entries (via PokeAPI)