A/N: So yeah, I haven't updated this for like way too long, and managed to push this chapter out in spite of working on Fear in Resonance, whose next chapter shoild come out in 1-2 days since I promised you guys it would. Also note that I have been really busy this week since I have my prom dance this Friday (idk how it is in your country, but we have it at around this time so that we can focus on finals later in the school year). This next chapter is a little (a lot) different than the other ones, becouse a very special OC is in it! She doesn't belong to me btw, but that will be in the disclaimer! Any way, enjoy!

Disclaimer: Phineas and Ferb and all characters from the actual show do not belong to me, they belong to Dan Povenmire and Jeff "Swampy" Marsh.

Disclaimer#2: Marie does also not belong to me! She belongs to her original creators Angelus19 and Eliana Moreno (sam-ely-ember), who are also making a web-comic about her (which is really awesome btw!) so yeah, I don't own her in short!

Like father like... daughter?

"You sure that you're alright with this Dr.D?" An adult Phineas Flynn asked him as he and his newly wedded wife Isabella were about to leave for their honeymoon. The two were at first reluctant to do so, since that would mean leaving their 4-year old daughter Marie at home without either of her parents.

The young couple had told everyone that they were OK with not having a honeymoon, but their family members wouldn't have it and secretly booked a honeymoon cruise without the couple's consent, and told them that Marie would simply have to spend some time at her grandparent's house. That was the plan any way, however, two days before the cruise soo many things happened that it was almost ridiculous!

What things you ask? Vivian got called by a relative and was told that her mother was ill and that she would have to take care of her for the next few weeks, Lawrence got called to an international antiques expo, Linda managed to fracture her hip while bowling, and just as they were hoping that Candace could look after Marie for the time being, she along with Jeremy and her three children managed to simultaniously catch the flu!

With the trip being just one day away and their bags already packed, the two tried to find a professional babysitter to look after their daughter and, well... let's just say that after spending a few hours with the little energetic girl the three won't be comming out of the hospital anytime soon...

Finally, after almost having given up Phineas thought of the one person outside of his family that was capable of handeling his daughter without ending up with severe injuries; none other than his old mentor Dr. Heinz Doofenshmirtz. Isabella was not satisfied with the sugestion since she knew the man all to well, but Phineas managed to convince her otherwise and with no other options, she was forced to accept.

And so, here they were leaving their house and trusting the former evil genius to look after their only daughter. When Doof got the call, he was more than happy to help Phineas out, and even agreed to the terms Isabella set that he would have to come over to their house; there was no way she was letting her daughter stay in his apartment!

Doofenshmirtz smiled "No problem! It's just one little girl right? How hard can it be? I've raised a daughter before you know!"

Isabella spoke up "Marie isn't your typical 4-year old. She's... well..." just then the three heard an explosion from the back yard and Marie frew in through the window (which was luckily open) and landed face first onto the floor. One would have expected her to be in pain, but this was nothing unusual for the small girl! She then picked herself up and rubbed her head "That didn't go as planned..." she stated.

Isabella once again spoke up "She takes after her father way too much" she referred to Phineas, who in turn chuckled "That she does! So, Dr.D, can I trust you with this?" Phineas asked for confirmation.

Doofenshmirtz waved his hand "Pffff, no problem! The two of us will be like two flies on a... whatever flies go to simultaniously... so don't you worry! Just relax and enjoy your honeymoon!" Doof stated, Isabella eying him curiously at the 'flyes' bit. Phineas then knelt down and picked Marie up "Ok sweetie, be nice to uncle Doofenshmirtz ok? Your mommy and I should be back by the end of the week." He finkshed, then kissed his daughter on the forehead, after which he hander her to Isabella, who gave her a long goodbye hug. Marie smiled "Of course I will daddy! You can count on me!"

"That's my girl! I'm gonna go start up the engine" he stated, then went to his car. Isabella then looked at Doofenshmirtz and began "Alright, I don't know what I was thinking when I agreed to this, but I'm gonna trust you with watching over my daughter. But one thing; this house had better still be here when we come back! I don't want any more wormhole incidents, and that goes for you too young lady!" Isabella stated in a rather strict voice, then softly smiled at her daughter and hugged her one final time "I'm gonna miss you sweet pea! Be good alright? And don't do anything too dangerous alright?"

"I will mommy! Have a safe trip! I promise to be a good girl and not do anything dangerous!" The girl proudly stated. Isabella smiled, then gave her a peck on the cheek and hurried to the car where Phineas was waiting for her, and the couple drove off, Marie and Heinz waving them off.

Dr.D then raised an eyebrow at the small girl "Say, why did you have your fingers crossed behind your back while talking to your mother?" He asked curiously, causing the girl to grin deviously, she then began "So, are you this 'mentor' person daddy keeps talking about?" The small girl asked, trying to confirm her suspicion. Doof nodded, and she then asked "And, you happen to like building large and outrageously complex inventions right?" Doof nodded again, and Marie explaimed "Perfect! Then we haven't got a minute to lose! Let's go to the back yard and build a robot! Or maybe a giant laser! Or maybe a giand laser and a robot! Or maybe-"

"Hold on! Hold on!" Doof interrupted her, causing the small girl to raise an eyebrow at him "Didn't we promise your mother that we wouldn't do anything dangerous?" Doof asked sceptically, and Marie put a finger on her lip and began innocently "What do you mean? You didn't promise mommy anything, and I had my fingers crossed!" She exclaimed proudly, happy to have outwitted both her parents and Doof.

Heinz stared at her for a few moments, then pointed at her with his index finger "Wow, you're good!" he stated, impressed by the little girl. She in turn closer her eyes, put her hands on her hips and proudly stated "I know. So, what are we waiting for? Lets go build something!"

The small girl then ran outside , eager to get to work and find out if this man who was supposed to watch over her for the next week was really everything his fsther had boasted about. Doofenshmirtz, no longer seeing a problem with the situstion, followed her outside

The week had gone by in a flash, Marie taking full advantage of the oportunity she had been given. She kept Doof on a suprisingly tight shedule, always finding something the two could build. What her father had told her about Dr.D turned out to be an understatement; the man wasn't just a great inventor, he was a master, instantly finding solutions to every problem that they encountered while building and being able to explain almost anything that she didn't understand. And the self-destruct buttons he wired into every invention; brilliant! What better way to say goodbye to an invention than to blow it up and watch the pieces fly in all directions? In short, the week had been great!

As for Doofenshmirtz, he was amazed at how alike Phineas and Marie were; not only in appearence, both of them having red hair, but also in character. Like Phineas, Marie was always happy, optimistic and full of energy and wanted to do nothing more than to build all day long, not willing to stop until the invention was finished. And if Phineas was somewhat hyperactive, words could not describe what Marie was! The girl was like a machine fueled by it's own movement and the more work she did, the more she was willing to do! She was also very kind and caring, and willing to help out anyone that needed help, much like her father. Doof couldn't help but smile whenever he observed the little girl, sometimes seeing a bit of himself in her!

"Do you think she's ok? What if something happened?" Isabella asked Phineas. The two had arrived back to Danville an hour earlier and were now headed back home. They had regularly called to check on their daughter, and Doof always told them that she was doing alright, so they should just enjoy the tropical weather instead of worrying.

Phineas rolles his evey "Izzy, trust me. If something had happened, he would have called us. Besides, you're going to see her in about 30 seconds, since we're already here!" Phineas stated, noting that they were already in front of their home. Upon parking the car, the two exited, went to the front door and opened it. Isabella expected to see half the house missing, but was suprised to see it still being whole. "Huh, looks loke everything's normal..." she stated, suprised.

"See, I told you that there was nothing to worry about"

"I guess, but where's Marie?" Isabella asked, not seeing her daughter, she then shouted "Marie! We're home!"

Moments later, both Doof and Marie came down the stairs "Mommy! Daddy!" The girl happily exclaimed, the rushed to her psrents and have them a big hug.

"Hi sweetie! I'm so happy to see you again!" Isabella explained, she then looked st Dofenshmirtz "So, did she give you any trouble?" Isabella asked him, happy that her daughter was alive and well.

Doof shook his head and smiled "Not at all. She behaved the entire time! Went to bed on time, are all of her vegetables-"

"Did she now?" Isabella asked sceptically, this seeming unusual for her daughter. She then asked "And no crazy inventions?"

"Nope! Not a single one!" Doof stated. Isabella crossed her arms, then stated "Alright then, me and Phineas will just head upstairs and drop off out suitcases, it's been a long drive home!"

Phineas then added "Thanks again for looking after her! Marie, be sure to say goodbye to uncle Doofensmhmirtz alright?"

"Yes daddy" the little girl said, after which Isabella and Phineas went upstairs. The small girl then looked at Doof smugly, smiled, then asked "Ate all my vegetables? No crazy inventions?"

Doof winked at her "Hey, what they don't know won't hurt them! And besides, how are they ever going to find out right?" Doof sacrastically asked, then chuckled.

Meanwhile upstairs

Phineas, who had put down his suitcase, booted up his computer and clicked on an icon titled "Camera". Isabella then wrapped her arms around him from behind and had a smile on her face. Phineas spoke up "No dangerous inventions eh?"

Isabella smirked "We'll just see abpout that!" she stated, and Phineas clicked on the "play footage" button.

END

Chapter end notes:

Different than usual I know, but I loved writing this chapter! This is just something that popped up while I was browsing a P&F image gallery (helps me come up with ideas) and spotted Marie in it, hands down the best OC ever created (if you are not familiar with her, just check out Angelus19 and Eliana Moreno (sam-ely-ember) the creators of Marie and Thomas! Also to understand everything you have to have at least some insight about Marie, but it is not that crutial, still, feel free to look it up! That's all from me for now, until next time!

jolleIQ is out, PEACE!