Tony Marzulo is Vanessa Doofenshmirtz's boyfriend in the 2nd Dimension.
In a deleted scene, he was mentioned when Vanessa's father had banished him for showing an interest in his daughter. Because of this, Vanessa arrives to confront her dad and storms off to her mother's place by taking her father's blimp keys. (Phineas and Ferb The Movie: Across the 2nd Dimension)
Tony would later return to Danville following the arrest of Vanessa's father for his crimes against humanity. Eventually, after two months, Vanessa formulates a plan by having Tony to help her family escape from Resistance custody in a hover car. The plan was a success, and as the notorious Doofenshmirtz family escape along with their remaining animal cyborg Pandaborg, Vanessa introduces Tony to her parents. Doofenshmirtz recognizes Tony as the boy he once banished earlier, to which Charlene confirmed, stating that nobody saw him do it. ("Tales from the Resistance: Back to the 2nd Dimension")
- "Tales from the Resistance: Back to the 2nd Dimension" (First) (Cameo)
- Phineas and Ferb The Movie: Across the 2nd Dimension (DVD) (Mentioned) (Deleted scene)
- The DVD closed captions during the "Vanessa Meets Doof" deleted scene spells his name "Tony Marzullo" instead of "Tony Marzulo".
- He, along with the taxi driver, are the only characters in the 2nd Dimension to not have a 1st Dimension counterpart, nor serve as a counterpart of someone from the 1st Dimension.
- In the 1st Dimension, Vanessa's boyfriend was Johnny.