in phineas and ferb dr. doofenshmirtz is an evil scientist who wants to use his machines to take over the tri-state area. he says he is “an evil scientist, not a mad scientist”. his nemesis perry the platypus stops his evil plans every day. dr. doofenshmirtz also has a lot of bad luck and says the reason he loses every time is because he has “poor planning skills”. doofenshmirtz also gives almost every machine he builds a name ending with “inator”. even though he calls himself evil and is the villain of the show, he has some good wikt:traits. for instance, he really does love his daughter vanessa.