The shell on its back is just skin that has cooled and hardened. It breaks easily with a slight touch.
Silver
Its brittle shell occasionally spouts intense flames that circulate throughout its body.
Crystal
Its body is as hot as lava and is always billowing. Flames will occasionally burst from its shell.
Ruby
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 original size by dripping itself in magma.
Sapphire
MAGCARGO's body temperature is approximately 18,000 degrees F. 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.
Emerald
The shell on its back is made of hardened magma. Tens of thousands of years spent living in volcanic craters have turned MAGCARGO's bodies into magma.
FireRed
Its brittle shell occasionally spouts intense flames that circulate throughout its body.
LeafGreen
The shell on its back is just skin that has cooled and hardened. It breaks easily with a slight touch.
Diamond
Its body temperature is roughly 18,000 degrees F. Flames spout from gaps in its hardened shell.
Pearl
Stadium 2
The shell on its back is just skin that has cooled and hardened. It breaks easily with a slight touch.
TCG
Dark Magcargo: The shell on its back comes of easily, exposing the flames running through its body.