Numel

“NUMEL is extremely dull witted - it doesn’t notice being hit. However, it can’t stand hunger for even a second. This POKéMON’s body is a seething cauldron of boiling magma.”

— Pokémon Ruby

“NUMEL stores magma of almost 2,200 degrees F within its body. If it gets wet, the magma cools and hardens. In that event, the POKéMON’s body grows heavy and its movements become sluggish.”

— Pokémon Sapphire

“A NUMEL stores boiling magma in the hump on its back. It is a hardy POKéMON that can transport a 220-pound load. It has served humans at work since long ago.”

— Pokémon Emerald