Q:Build a movie plot around this: Who built the Amnesia-Inator? Doofenshmirtz
A:
This section's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. (July 2015) (Learn how and when to remove this template message)Phineas and Ferb are celebrating the fifth anniversary of when they got their pet platypus, Perry. In commemoration, they create a giant shuttlecock and robotic replica figure of Perry to play an improvised game of badminton. However, when Perry's hovercraft accidentally collides with their shuttlecock, the boys crash into Dr. Heinz Doofenshmirtz's laboratory and destroy his "Other-Dimension-Inator", which is designed to help him travel to parallel dimensions. Intrigued by the idea, the two help Doofenshmirtz rebuild the machine, while Perry arrives on his mission to stop Doofenshmirtz. Unwilling to give away his secret identity to the boys (which would get him relocated to another family), Perry reverts to his pet mode and is forced to watch them help Doofenshmirtz activate his invention.The group is transported to an alternate dimension where a second, truly intelligent and evil Doofenshmirtz rules over his Tri-State Area. The second Perry (known as Platyborg), was converted into an evil cyborg by Doofenshimrtz-2 and programmed to serve as his second-in-command and general of his army of Norm-Bots. When the boys arrive with Perry to Doofenshmirtz-2's office, Doof-2 recognizes Perry as a secret agent and orders Platyborg to attack Perry. When that doesn't affect him, Doofenshmirtz-2 orders Platyborg to attack the boys next, which forces Perry to reveal his secret identity to stop Platyborg from doing so, much to the others' shock. Doofenshmirtz-2 then sends several of his Norm Bots to catch Perry and the boys, but the trio escapes. Afterwards, Phineas expresses his anger at Perry for using him and Ferb as a cover for his double life.After seeing that their remote for the portal is broken, the boys find their alternate selves, who are shown to have grown up without knowing about summer....