Perry is the pet platypus of the Flynn @-@ Fletcher family , and is perceived as mindless and domesticated . In secret , however , he live a double life as a member of an all @-@ animal espionage organization referred to as O.W.C.A. ( The Organization Without a Cool Acronym ) . Many secret entrances to his underground lair exist all around the house ; such as the side of the house , most notably the tree that his owners sit under in the backyard , and several other everyday objects that seem to elude the family 's attention . He engage in daily battles with Dr. Heinz Doofenshmirtz , an evil scientist who desire to take over the Tri @-@ state area with obscure contraptions that work perfectly according to his intended function but fail in his application of them every time .