This is a world in which only Pokemon live. Many possess the rare and unique ability to transform other mons into living, sentient diapers, gaining the strength and abilities of the transformed mons upon wearing them. Many mons have learned to use this ability for their own benefit, from enhancing their strength to hunting down targets or even selling them as merchandise, with some treating their diapers as partners and others viewing them as equipment.

One such mon was a Heatmor, a blacksmith who spends his days working in his shop, hammering away at raw materials and molding them into shape. Notably, he had a fondness for Steel-type Pokemon, using heat to make their bodies soft and malleable before reshaping them into tools, armor, weapons, and even diapers; their metallic bodies making the resulting works very strong and durable.