Perry the Platypus, codenamed Agent P, is one of the main characters from the DisneyChannel animated series Phineas and Ferb. He is the pet platypus of Phineas Flynn and Ferb Fletcher. Unbeknownst to his owners, he lives a double life as a secret agent for The O.W.C.A. (The Organization Without a Cool Acronym, a.k.a. "The Agency"), a government organization of animal spies. In the Agency, his immediate superior is Major Monogram. Perry has a lair under the Flynn-Fletcher's house that can be entered through various passages.
His nemesis is Dr. Heinz Doofenshmirtz. Perry's mission is almost always foiling the doctor's plans, which he successfully accomplishes almost every time even with minimal details about the plans. During these missions, his battle with Dr. Doofenshmirtz usually ends up cleaning up what Phineas and Ferb have been working on that day.