Phineas Flynn is a boy in the Flynn-Fletcher family, and the 2nd Dimension counterpart of Phineas Flynn. Stuck in an area which is ruled by the evil Doofenshmirtz family, he has grown up without summer vacation and has never heard of it.
Story[]
Life before Doof-2's reign[]
Born during the 90s, Phineas' early years were presumably the same as those of his 1st Dimension counterpart: his mother Linda met and fell in love with Lawrence Fletcher, to whom she later married, and he and his sister, Candace, gained Lawrence's son Ferb as a stepbrother. At least five years prior to Across the 2nd Dimension, Phineas and Ferb bought Perry, who apparently was a secret agent (it is never brought up). Somehow, Perry was defeated and captured by Dr. Doofenshmirtz without Phineas' knowledge and turned into the Platyborg, which commanded an army of Norm bots to invade The Tri-State Area and conquer it. Now forced to live under Doofenshmirtz's tyrannical reign, Phineas spent the recent years wearing Dooferals and playing Doofopoly with Ferb. At some point, Candace founded The Resistance, an organization bent on ending Doofenshmirtz's rule once and for all, but forbade Phineas or Ferb from joining it out of concern for their safety.
The 1st Coming[]
Phineas and Ferb meet their 1st Dimension counterparts, with the former believing that they are being replaced with duplicates at first. He shares an emotional hug with Perry-1, initially believing he is his Perry, before he tells Phineas-1 of the nonexistence of summer in the 2nd Dimension. After Perry-1 departs, the four all decide to go to the house of Isabella for help, during which they are joined by Buford. The five then arrive at the Resistance headquarters via chute, and he, Ferb, and their 1st Dimension selves find out that Candace is the Resistance's leader.
Candace agrees to help Phineas-1, Ferb-1, and a recently arrived Candace-1 retrieve a captured Perry-1, but tells him and Ferb to stay behind. However, they stow away in the mine carts used by the Resistance to get to Doofenshmirtz Evil Incorporated. When the group manages to rescue Perry-1 and get pursued by Norm bots, Candace is forced to separate the mine cart containing the 1st Dimension characters, resulting in their capture; Phineas protests against this, but he is overridden.
Later managing to get recruited into the Resistance along with Ferb, Phineas arrives at DEI to rescue Candace, who was captured after aiding the 1st Dimension characters. She initially disapproves of her brothers' decisions, but after seeing they can handle themselves, she changes her mind and the three share a loving hug.
Phineas is later among the Resistance members that congratulate the 1st Dimension characters for defeating Doofenshmirtz. He is also reunited with Perry, whose evil was "fried out of him" after a climactic showdown with Perry-1, and he returns to his home dimension with his pet
Tales From The Resistance[]
Following Doofenshmirtz's arrest, Phineas settled down into a peaceful life with his family, feeling happy that Perry is now back. He and the other kids settled down, reinvigorating their sense of fun towards sports. However, the glee is cut short when two giant insect robots attacked the park and Perry is kidnapped by several animal cyborgs (who happen to be the missing agents of O.W.C.A. during Doofenshmirtz's reign). Phineas later learns from Candace that Doofenshmirtz's ex-wife Charlene was the one responsible for turning the agents into cyborgs and kidnapping Perry, Phineas aids the Resistance into rescuing Perry.
He and Perry later aid Candace (and a restrained Doofenshmirtz) into finding Charlene's penthouse, where they learns that Doofenshmirtz and Charlene had pretended to be divorced because of several finance advantages. Plus, Charlene revealed that the park attack and the kidnapping was nothing but a ruse to trick the Resistance into freeing her husband. As such, Charlene sets her animal cyborgs to trap Phineas, Candace, and Perry; in a more darker note, Ferb was supposedly captured by Pandaborg and turned into a cyborg. However, it turns out that Ferb had actually faked being turned into a cyborg and released his siblings and Perry, and Phineas had actually played along as part of their plan for the Resistance to set off a frontal attack in Charlene's penthouse.
Phineas-2 riding on Perry-2
After the Resistance arrive in Charlene's penthouse, Phineas helps Isabella freeing Chihuahuaborg of his evil programming. Eventually, after the rest of the animal agents are freed from their evil programming (except for Pandaborg), Candace is about to send both Doofenshmirtz and Charlene into custody, only to be interrupted by their daughter Vanessa, who convinces Candace to let her have a moment with her family. As Phineas and Ferb watch Vanessa sharing a moment with her family, Vanessa suddenly takes the opportunity to help her family and Pandaborg to escape in a hover car driven by Vanessa's boyfriend Tony Marzulo. Despite the Doofenshmirtz family's escape, Phineas would still continue settling down to a peaceful life with his family.
Phineas & Ferb Legends[]
Phineas and Ferb tried to help their sister Candace to defeat the Doofenshmirtz Family during the last day of summer. However Candace still protects him and Ferb by forcing them to stay where it's safe. However Phineas attacked Candace and he and Ferb was sent to timeout. Until the Doofenshmirtz Family hired him and Ferb. When Candace appeared to stop Vanessa, then Phineas and Ferb attacked Candace to death and betrayed her, then hijacked the Normbots and betrayed the Doofenshmirtz Family and taken over the Tri-State-Area. However, their sister consumed with anger and revenge against them and successfully busted them. Phineas and Ferb was finally busted and was sent to the orphanage from the Tri-State-Area. However, Phineas and Ferb left the 2nd Dimension
Personality[]
Phineas is presumed to be an optimist, like his 1st Dimension counterpart, though this side of him isn't shown in the film. Speaking of which, he is depicted in the movie as having a need to join The Resistance's movement of overthrowing Doofenshmirtz, only for him and Ferb to be rebuffed by Candace. He also displays a caring attitude, which is usually aimed towards the 1st Dimension characters in the film, as he showed reluctance at allowing Candace to separate their mine cart from theirs, which would result in their capture at the hands of the Norm bots.