Magcargo

Magcargo's shell is actually its skin that hardened as a result of cooling. Its shell is very brittle and fragile—just touching it causes it to crumble apart. This Pokémon returns to its original size by dipping itself in magma.

Magcargo’s body temperature is approximately 18,000 degrees Fahrenheit. Water is vaporized on contact. If this Pokémon is caught in the rain, the raindrops instantly turn into steam, cloaking the area in a thick fog.