"Well, it looks striking," he continued. "Anyways, Doofenshmirtz recently took up a day job at the local animal shelter. We know that he's not one to volunteer his good services like that, so your mission is to find out his ulterior motive, and stop him if necessary."
Major Monogroom is a household Shih tzu of the O.W.C.A. He is the only animal of the organization who is unable to perform on missions.
Major Monogroom was created from scratch by the O.W.C.A. He was originally an inpenetrable agent who foiled nearly every villain without ever getting a single hit.
He was also Perry's mentor for several years.
However, during his first fight with Dr. Heinz Doofenshmirtz, he got hit by the behave-inator and he abruptly lost his agent abilities. From that point on, Major Monogroom became a house pet for the O.W.C.A and Agent P took on the assignment of fighting Doofenshmirtz.
Much like his owner, he is strict and focuses highly on the mission at hand. However, since becoming hit by the behave-inator caused him to lose that strict personality.