Vanessa Doofenshmirtz is the daughter of Heinz and Charlene Doofenshmirtz and 2nd Dimension counterpart of Vanessa Doofenshmirtz that was cut from Phineas and Ferb The Movie: Across the 2nd Dimension. She only appears in "Vanessa Meets Doof", a deleted scene which can be seen from the bonus features in the movie's corresponding DVD. Her father is known to banish every boy who shows an interest in her and because of this, she believes that she will never have a social life. The first and only time she appears, she complained to her dad about banishing Tony Marzulo, another boy who showed an interest in her. When her dad says "done and done," she storms off and says she will be going back to her mother's place.
Vanessa will return in the episode Tales from the Resistance: Back to the 2nd Dimension, where she is seen staying at her mother's penthouse following her father's arrest. She also knows that her mother is just as evil as her father, since she is aware that Charlene had kidnapped several of O.W.C.A.'s agents and turned them into cyborgs, similar to how Heinz defeated Perry the Platypus and turned him into Platyborg. In the end, Vanessa aids both her mother and father, as well as Pandaborg, to escape from Resistance custody by having Tony to drive them away in a hover car.