The following is a plot bunny that popped into my head as I watched some Phineas and Ferb with my son. I've been fighting it…but alas, some things must be written. Now, I've tried to stay true to things in both "realities," but there are bound to be some discrepancies. Please mark them as a creative twist…

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Linda Flynn-Fletcher walked silently over to the bookshelf in the living room and after checking only two shelves, pulled out a photo-album that she had not looked at in at least four years. The cover was hardbound in leather and on the front cover was a small gold colored pin in the shape of a Trilobite with a pair of golden feather wings spread behind it. With a quick puff, Linda blew the dust off the album and smiled. This was something she had not shared with her boys and doubted that her daughter even remembered it.

With a smile, Linda walked to the couch and sat down, placing the album on the coffee table in front of her. Brushing back a stray lock of her curly strawberry-blonde hair, she called out, "Kids, come and see what I've found!"

The first one in the room was her daughter Candace Flynn, the mirror of her mother at a younger age. Candace was skinny but not rail-thin, with the same head of strawberry-blonde hair. At fifteen, she rarely was not on her cell-phone or ogling the boy down the street, Jeremy. When she wasn't on the phone, however, she had a strange obsession with trying to get her brothers in trouble in the most imaginative ways…

Immediately following Candace was Phineas Flynn and Ferb Fletcher. Phineas was her brother by blood and the youngest of the family. Phineas, at nine years old, had the same color hair as his mother and sister, but not nearly as much of it. Phineas was bright eyed as usually, with a gleam that showed a desire to explore all things, drinking in as much as he could of life, and an imagination that was unrivaled.

"Hey mom, what's up?"

Ferb Fletcher, the middle child and step-brother to both Candace and Phineas, was not as thin as his siblings, and had a full head of thick, light-brown hair. At the age of twelve, Ferb was beginning to see the girls, but his own sense of adventure equaled that of his brother and the pair could be quite a handful. While he lacked the wild imagination of Phineas, he had shown great skill with puzzles and already shown a knack for engineering and creativeness.

Linda gestured for the children to come closer and sit down with her, "I thought you might all like to hear a tale about your ancestors, way back when they met the first time."

Candace rolled her eyes, "You've already told us about Fergsor and Dr Phineastein."

Linda 'tsked' at her daughter, "Oh no, this is not them, this story about the other side of the family. You see, they were the forefathers of our families. The people I'm talking about were on your fore-mothers' side of things. There was a beautiful woman, and two men that wanted nothing more than to be her husband. Now of course she could only choose one, and they're line became the Flynn's. The other man's descendents became the Fletchers as their daughters married into the family.

All three children were suddenly very interested and listened intently as their mother began to thumb through the pages. The first was a photo of a beautiful Blonde-haired woman, with the same eyes as Phineas. On her face was a pair of very wide circular glasses and her hair was pulled back in a tight pony-tail. Though she was very plainly beautiful, it could take a second glance to see it, since her face was smudged with grease and slung over her shoulder was a very large wrench. "Phineas, Candace, this is your 'not sure how many greats'-grandmother, Agatha Heterodyne."

Pointing to the next page, there were two pictures, each of a different man. The first one was of a man with green eyes and blazing red hair, he too looked as though he had just finished working in a mechanics shop, and the smile on his face said that he loved his work, "This is Agatha's husband, Gilgamesh Wulfenbach, though he went by 'Gil,' from what I was told."

"Who's the other guy?" Candace asked aloud.

"That is the man that was also trying to marry Agatha." Linda said with a chuckle, "Ferb, this is your 'not sure how many greats'-grandfather, Tarvek Sturmvoraus." Looking at the picture, had dark brown hair that laid flat just like Ferbs' hair. He wore a pair of small round lens glasses, and his face was very serious.

"He doesn't look very happy." Candace said simply.

Linda smiled, "This picture was taken at the wedding of Gil and Agatha."

There was a very short pause before Linda continued, thumbing through different pictures as she went. "All three of them were supposedly great inventors. Grandfather Flynn called them 'Sparks,' and said they were all loony."

Phineas' eyes lit up, "What did he mean by 'Sparks?'

"Well," Linda said, "He always said that the best inventions in the world during those days were created by people with the 'spark.' I think that was just his way of saying that they had a knack for invention." Linda paused for a moment before stopping at a picture of a large castle

"Oh, now this was always your Grandfathers most entertaining part of the stories." Linda said with a wry chuckle.

"They had their own castle?" Phineas asked with an excited voice.

"Indeed they did. It was called Castle Heterodyne, and Grandfather told the craziest tales about it. Saying that their ancestors from way before Agatha's time had all been sparks, and each one had added more and more to the Castle. Eventually, the castle supposedly gained a mind of its' own and could reshape itself and even defend the town around it." Linda said with a crooked smile

"That sounds like something these two would make." Candace said with an exasperated sigh.

Ferb glanced at his brother and saw a familiar gleam in his eyes, and knew that the gears were churning in Phineas' mind, but before anything else could sink into definite plans, Linda continued.

"I don't know about that Candace, according to Grandfather, the castle actually was quite insane. Too much ego. I can't see these boys making anything that crazy."

Candace muttered, "I can."

As the early morning passed, Linda continued to thumb through the old photo album, showing the children all sorts of pictures of their families ancestors and their friends and even pets. As the pages turned the house pet, a Platypus named Perry, came in and crawled into Phineas' lap, chittering softly as the boy stroked the animals furry coat.

There was Violetta, the Smoke Knight and guardian of Tarvek. Phineas commented that she was like a Ninja when Linda explained that the Smoke Knights were actually stealthy and clever. Theopholous DuMedd; the cousin of Agatha, Sleipnir O'Hara; a friend of both Agatha and Gil, and Zeetha; who was a personal trainer of Agatha's each made multiple appearances in the pictures and then finally, was the house cat, Krosp.

"Now that is a big cat!" Candace said when she saw the picture of Krosp. The cat was easily the size of a bobcat with pure white fur. In the picture, Krosp was lying on the top of a counter, atop several wrenches that both Agatha and Gil seemed intent to get from him.

Linda chuckled, "Krosp was as crazy of a story as the Castle. Supposedly, he walked like humans do and could talk just as well as we do."

Perry the Platypus reached out and put a paw over the top of the picture and chittered agitatedly.

"Ah, don't be jealous fella." Phineas said with a smile, "You're much better than some talking cat."

Perry chattered again and then was silent and calm for the rest of the time that the family spent looking through the rest of the photo album. After they were done, and Linda was placing the Album back onto the shelf, she simply commented, "Wouldn't it be fun to travel back in time and see the family, see why they have such crazy stories about them?"

Phineas turned suddenly to Ferb, "Ferb, I know what we're going to do today!"