Relation with Phineas and FerbEdit
Every time that Phineas and Ferb make something, it always disappears because of one of Doofenshmirtz's machines. His nemesis is also Phineas's pet, Perry the Platypus. In the movie, he meets Phineas and Ferb.
Dr. Doofenshmirtz's inventions never seem to work right. Most of his inventions involve the suffix "-inator". As previously stated, Doofenshmirtz's inventions make Phineas and Ferb's inventions disappear. He has created a robot named Norm. Norm seems to be slightly dim-witted, and often says random things. Norm may also be a little smarter than Dr. Doofenshmirtz.
Doofenshmirtz has several different backstories, including one about him being the family lawn gnome when he was a kid (in which "his only companions were the moon and his neighbor Kenny" and in it his father always yelled "Abaiga de victh!"), one about a balloon he named "Balloony", who floated away, and one where he had to wear a dress. Dr. Doofenshmirtz has a lot of other backstories, which contubuted to his being evil.
Dr. Doofensmirtz family mostly dislikes him and he disspieses all of them besides his daughter Vanessa Doofensmirtz. He recives a check from his ex every month. His brother Roger Doofenshmirtz is mayor of The Tri-State Area
- His daughter, Vanessa, is obsessed with proving to her mom that Doofenshmirtz is evil, similar to how Candace wants to prove to her mom how Phineas and Ferb make inventions in their backyard. Both are never able to truly "bust" their family members, much to their dismay. They both once had their clothes mixed up at the washers.
- Doofenshmirtz dislikes many things, including underwater welders, Perry, health-fanatic cooks, monks, his brother, Valentine's day, birds, and everything else, but he couldn't find anything wrong with Christmas until Perry the Platypus tied him up and put a partridge on his nose.