The MOP, or Mail carriers Of Powerpets, are responsible for making sure that mail gets from one place to another on time. To be a member of the MOP, each job applicant must go through an arduous interview process and series of tests.
First, they must know every side street and alley in every PowerPets city, and be able to traverse a mile in five minutes or less. They must be willing to work tirelessly in rain, sleet, snow, even hurricanes at the Swap Barn.
Next, each is given a Skateboard (basic equipment for the job) and must show their prowess on it by using defensive skateboarding skills. Finally, they must pass through a treacherous obstacle course in which hidden patches of slime threaten to slip them up, and a mechanical version of Hazzard tries to grab their mail bag.