Vanessa Doofenshmirtz (2nd Dimension)

2nd Dimension Vanessa Doofenshmirtz is a character of the Phineas and Ferb 2nd Dimension story arc, making a cameo appearance in Phineas and Ferb: Across the 2nd Dimension, and later as the secondary antagonist in Tales from the Resistance: Back to the 2nd Dimension. She is an alternate reality version of Vanessa Doofenshmirtz, and happens to retain the same personality and mannerisms as her original counterpart.

History
She first appears in the TV film, where she confronts her father (who is the dictator of the Tri-State Area in his dimension) for banishing her boyfriend Tony Marzulo for showing an interest towards her. She then notices another person standing next to her, asking who is he. Her father replies not to mind him, saying that it's just him from another dimension. 2nd Vanessa then storms off to her mother's place, and takes her father's blimp keys to get there. This scene was actually deleted from the finalized version, though it was later shown in the movie's DVD through the bonus features.

2nd Vanessa returns in "Tales from the Resistance: Back to the 2nd Dimension", where she is seen staying at her mother's penthouse following her father's arrest for his crimes against humanity. She is also aware that her mother is just as evil as her father, since 2nd Charlene had turned several of O.W.C.A.'s agents into ruthless cyborgs, similar to how 2nd Doofenshmirtz turned 2nd Perry into Platyborg. After the Resistance freed the agents of their evil programming, their leader, 2nd Dimension Candace Flynn, is about to take both 2nd Doofenshmirtz and 2nd Charlene into custody, but 2nd Vanessa arrives and convinces her to let her have a moment with her family. However, this was revealed to be a trick, as 2nd Vanessa takes the opportunity to aid both her parents and Pandaborg to escape from Resistance custody by having Tony to drive them away in a hover car. As the notorious Doofenshmirtz family escape, 2nd Vanessa introduces Tony to her parents, and 2nd Doofenshmirtz recognizes him as the boy he once banished earlier.