|Series||Phineas and Ferb|
|Location||Hokey Pokey Woods|
|Voiced by||Olivia Olson|
|“||Seriously, Marceline?! She has, like, the world's most irritating voice.||”|
Vanessa Doofenshmirtz is the daughter of mad scientist and general antagonist Heinz Doofenshmirtz on Disney's Phineas and Ferb. Vanessa has violet eyes and long medium brown hair. She wears a tight-fitting leather coat, long pants, and calf-high boots, all black in the basic military Goth fashion. She tends to be sharp and sarcastic, and although she tries to deny it when around her father, she has inherited his villainy to a small extent, aiding his schemes on rare occasions, snatching dolls from little girls, and opposing the activities of the do-gooding O.W.C.A. ("Organization Without a Cool Acronym").
Vanessa was transported to the FusionFall world when she was caught in the beam of her father's Fusioninator (a result of an ill-starred attempt to create his own platypus agent by melding a beaver, a duck, and Norm). She ended up in the Hokey Pokey Woods, where she was mistaken for Belladonna by Lil' Arturo, for Raven by Cyborg, for Gwen by Brick, and for Marceline by the Magical Toadstool in Marzipan City, in the "Who's That Girl?" mission. She is intensely irked by these mix-ups.