Do you want to learn how to draw Dr. Doofenshmirtz from Phineas and Ferb? Professor Doofenshmirtz is Perry the Platypus' arch nemesis who is always trying to take over the tri-state area with his evil schemes. I have put together a step-by-step tutorial that will help you figure out how to draw Doctor Doofenshmirtzby using simple shapes to build up Dr. Doofenshmirtz's form. This is an intermediate cartooning tutorial that older kids, teens, and adults will enjoy. Even some younger children might be able to draw Dr. Doofenshmirtz if you stand by to help with the instructions.