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

Living on a small town on a small island in this world was a shiny Zangoose by the name of Zazzy. His mother and big sister had long since left home to become skilled and ruthless bounty hunters, with Zazzy looking to follow in their footsteps by becoming a hired mercenary, getting paid to act as a bodyguard or to hunt down wanted outlaws. But he hoped to one day get strong enough to leave town and find his own way in the world...