Magcargo are fairly large, snail-like Pokémon that consist almost entirely of red-colored magma, much like their pre-evolution. They have large eyes with yellow sclera and black pupils, and a wide mouth that appears to be smiling. Large drops of magma are in the corners of their mouths. On their backs, Magcargo have a hardened, black, circular shell that is nothing more than a hardened layer of magma that can flake off easily upon contact. The shell has many cracks in it, from which flames occasionally spout.
Magcargo have bodies made of magma that is over 18,000 degrees Fahrenheit in temperature. They can use many Fire-type moves because of this. They can also learn Recover.
Magcargo are said to return to their original size by dipping themselves in magma. Magcargo also try to stay near extremely hot things to prevent their magma bodies from hardening.
According to the Pokédex, Magcargo have lived in volcano craters for tens of thousands of years.
This Pokémon was unavailable prior to Generation I.