<Tr> <Th> Nationality </Th> <Td> Drusselsteinian </Td> </Tr> <Tr> <Th> Affiliation </Th> <Td> LOVEMUFFIN (League of Villainous Evildoers Maniacally United For Frightening Investments in Naughtiness) </Td> </Tr> <P> Dr. Heinz Doofenshmirtz (sometimes called "Doof") is a fictional character from the American animated television show Phineas and Ferb . He was created by Dan Povenmire and Jeff "Swampy" Marsh, and is voiced by Povenmire . The character first appeared in the pilot episode of the series and appears in the majority of episodes . He is described as an incompetent and forgetful evil scientist intent on conquering the "entire tri-state area" by creating obscure but nefarious inventions . Dr. Doofenshmirtz speaks with a caricature of a German accent and is from the fictional European country Drusselstein . </P> <P> Doofenshmirtz appears in several merchandise pieces, including the book series and the video game . He made a later appearance in the Milo Murphy's Law episode "Fungus Among Us" and will later appear in the untitled 2019 Phineas and Ferb / Milo Murphy's Law crossover episode . </P>

Who does the voice of doofenshmirtz on phineas and ferb