This is an AU; either it takes place in the first or second dimension. I have no clue (although I'm pretty sure it's in the second dimension, although they wear their normal clothes except the resistance, and Perry isn't a platyborg). As of now it is your choice. Enjoy.
P&F
Prologue
Phineas Flynn was only two when the Tri-State Area had been taken over by the evil Dr. Heinz Doofenshmirtz. It was just happened during the time Linda, Phineas' mother, had started dating again. His father had left him, his mother, and Candace his older sister a few months back, not that Phineas would remember him in the future or anything. No one but Linda knew the reason of why he left, but no one dared ask, as they didn't want to hurt her. However, if Phineas was old enough to question it, he would ask through innocent curiosity.
Despite all that had happened to him and his family, Phineas seemed to be the only one remaining positive. Him and Ferb, that is. Ferb was the son of Lawrence Fletcher, who Linda had been dating. Almost instantly did the two become best friends. They never argued, they did almost everything together, they liked the same things. It's almost impossible to find a friend like that.
When Phineas was four, the schools were closed. Drastically in only two years did things change; Candace had been disappearing to who knows where? So did Perry, they're newly adopted pet platypus, but he did that ever since they got him, so they didn't worry too much. The bright side of things was that Linda and Lawrence had been married in secret; the reason was that marriage was illegal now. The Flynn/Fletcher family was happy, especially Phineas and Ferb, who now could be with each other all the time, considering they were brothers.
Lawrence was diagnosed with cancer when Phineas turned five. It was a good thing that Dr. Doofenshmirtz didn't ban hospitals. Even he wasn't that evil. Every other week, Lawrence went to the hospital to check his vital organs, especially his lungs. Ferb was probably the most worried. He was afraid that his father would die, that one day he may not come back from the hospital.
Phineas, more optimistic than ever, was always there to comfort and cheer him up.
When Phineas was six, he and Ferb found their knack for building things. Just about anything that an adult could do, Phineas and Ferb could do as well (if not, better). The only downside was that Candace would always try to stop them. And for good reason too. The Norm-bots had been scouting the neighborhood since Dr. Doofenshmirtz's reign began. If something were to happen to Phineas and Ferb…she would never forgive herself.
Sadly, Lawrence died when Phineas was seven. Although the funeral was cut short thanks to the Norm-bots, everyone was too sad to think about the circumstances, especially Ferb. He knew this would happen one day…he just hoped it wouldn't happen so soon. Phineas seemed to be the only one who could comfort him. But it didn't last, sadly.
Three months later, Phineas learnt that Ferb was being sent back to his biological mother in England. This he couldn't handle. He never met his real father, that was true, but Lawrence was like a real father to him. He was lucky he didn't fall too deep into sorrow during the funeral, but now Ferb was leaving too?
This couldn't be happening to him! It had to be a nightmare, it just had to be. That's what Phineas was thinking the day Ferb left. A week later, Candace disappeared again, only this time she didn't come back. Phineas only prayed that his mother or Perry didn't disappear as well and never come back.
Sooner or later, he had begun wishing that he hadn't wished it. On his mother's behalf that is. Sure she loved Lawrence and was the second saddest at the funeral, and she loved Ferb like a son, but when Candace disappeared she went completely bonkers! Worse of all, she took it all out on Phineas, as if his life couldn't get any worse from there. The only friend he had left now was Perry, and he was a platypus.
When Phineas turned eight, it seemed like the entire positive outlet he had seemed to quietly vanish from existence. There was no telling how he felt: sad, angry, even betrayed. Betrayed by the little family he had left; Candace for leaving him and his mother for going completely abusive on him. It completely broke him.
And yet, on one fateful day, there was a glimmer of hope. While Phineas was cleaning out the basement (Linda was grocery shopping and expected it to be cleaned before she got home) he found a box of his father's old possessions. At first he thought it belonged to his stepfather, but when he looked into it he couldn't believe his eyes. This belonged to his biological father.
There was a shining red toolbox inside, with all sorts of tools, and a picture of the family. Phineas felt crestfallen when he saw that his father was cut out of the picture. It seemed like his mother didn't want him to find out who his father was. But the one thing that caught his eye was a note. A note signed for Phineas to read only. When he read the letter, there was a newborn hope arose inside of Phineas. Just when Phineas was reading it, Perry came down and saw the letter.
"Oh, there you are Perry," Phineas said, "Look what I found."
Perry let out a chatter that made Phineas assume that it meant he was asking what it was. The naïve boy grinned and said, "It's a note from my dad. My REAL dad! This was exactly what I needed!"
Indeed it was. Phineas knew exactly what he had to do. It was stupid. No, it was beyond stupid. It was completely insane! It would never work, would it?
But he was willing to take a chance. He was going to find his father, with or without anyone's help.
He, Phineas Flynn, the one who was just the picture of almost complete innocence was running away.
A/N: Actually, real platypuses are really vicious, and have a venomous bite. In other words, not really the best pet choice. Unless you prefer death.
Anyways, how do you like it? Bad I assume? Or by some miracle good? I NEED TO KNOW!
Please review; no flaming or spamming (stupid pointless annoying, messages; that spells spam), but critical advice is advised.
Also, I am still working on my other P&F stories Ferb's Goodbye, and Phineas and Ferb: The Lion King, so don't worry. I just wanted to write this story so badly it wouldn't leave my mind. Hope you like it.