 Perry the Platypus , also known as Agent P or simply Perry , is an anthropomorphic platypus from the animated series Phineas and Ferb . Perry was created by the series ' co @-@ founders , Dan Povenmire and Jeff " Swampy " Marsh . He first appeared along with the majority of the main cast in the pilot episode " Rollercoaster . " Perry is featured as the star of the B @-@ plot for every episode of the series , alongside his nemesis Dr. Heinz Doofenshmirtz . A mostly silent character , his lone vocal characteristic ( a rattling of Perry 's beak ) was provided by Dee Bradley Baker . 
 Perry the Platypus , also known as Agent P or simply Perry , <a href='drop_aux' title='1'><mark>is</mark></a>an anthropomorphic platypus from the animated series Phineas and Ferb . Perry was created by the series <a href='null_genetive' title='2'><mark>'</mark></a><a href='uninflect' title='3'><mark>co</mark></a> @-@ founders , Dan Povenmire and Jeff " Swampy " Marsh . He first appeared along with the majority of the main cast in the pilot episode " Rollercoaster . " Perry is featured as the star of the B @-@ plot for every episode of the series , alongside his nemesis Dr. Heinz Doofenshmirtz . A mostly silent character , his lone vocal characteristic ( a rattling of Perry <a href='null_genetive' title='4'><mark>'s</mark></a>beak ) was provided by Dee Bradley Baker . 
Perry the Platypus , also known as Agent P or simply Perry , an anthropomorphic platypus from the animated series Phineas and Ferb . Perry was created by the series  coed @-@ founders , Dan Povenmire and Jeff " Swampy " Marsh . He first appeared along witt da majority of the main cast in tdapilot episode " Rollercoaster . " Perry is featured as thdatar of the B @-@ plot for every episode of the series , alongside his nemesis Dr. Heinz Doofenshmirtz . A mostly silent character , his lone vocal characteristic ( a rattling of Perry  beak ) was provided by Dee Bradley Baker .