Soon after the battle with the mad scientists, back in Danville, Isabella was sitting on a chair in her house.

"Well, I searched everywhere for Perry and I couldn't find him anywhere" she said to herself "what am I going to do? Hmm, maybe I could buy Phineas a new platypus and say he's Perry. No, he's too smart to fall for that, and I couldn't lie to him."

The girl got off the chair and wandered into her living room.

"I'll just have to tell him the truth and hope he isn't too upset" she said.

She hopped on her couch, then heard a familiar noise coming from underneath it.

"No way, it can't be" she said.

The girl bent down and peered her head under the couch. Sure enough, there was…

"Perry!" Isabella exclaimed, grabbing him from under the couch "you were under there the whole time! Wait, I thought I checked under the couch? Oh well, I'm just glad you're back" she added, hugging and nuzzling the platypus.

Then her expression turned serious "bad Perry! Don't you ever make me worry like that again!" she said "do you know I was looking all over town for you? Well you're back now and I'm not letting you out of my sight. But first, let me get you some food, I'm sure you haven't eaten all day."

Isabella left the room to get food for Perry. This time however, the platypus didn't go anywhere; he didn't need to, he had already accomplished his mission, with some help from Kim Possible, and Phineas & Ferb.

Right now, Perry was looking forward to seeing them again and being back in their house.

"Whew, I'm glad you didn't disappear on me again" Isabella said, as she came out with a bowl of food "eat up, I want Phineas to know I took good care of you while he was gone. Oh, and let's not say anything about the whole 'you being lost' thing. Although it's not like you can talk anyway."

Perry just ignored her and dug into the food.


Later in the day, the Fletcher-Flynn kids prepared to say their goodbyes to their new out-of-town friends.

"I'm so sorry about taking your suit thingy" Candace said "it was wrong and I should've asked you first. But I did like beating up those bad guys."

"That is one of the suit's best features" Kim replied "and I forgive you. Just don't take any of my clothes again, I mean it."

"Nope, I've learned my lesson" Candace said "I will never imiatate another person for fame again. Unless they're a well-known super model or movie actress."

"Close enough" Kim said, before giving the redhead a hug.

"Thanks for letting us work with you" Phineas said to Tim "did you guys ever fix that first rocket bike?"

"Yeah, we worked out all the bugs" Jim said.

"Too bad you won't get to ride 'em with us" Tim added.

"That's okay, me and Ferb might make some when we get home" Phineas replied "this trip has given me a whole bunch of ideas for stuff to do."

"Well we had fun working with you" Jim said.

"It's not everyday we meet two kids with an IQ similar to ours" Tim added.

"In fact, except for Wade, I don't think we know anybody who equals our intellect" Jim finished.

"Here's our e-mail address" Tim told Phineas, handing him a piece of paper "if you ever need help with anything, or want us to pay a visit, let us know."

"Can do."

"Have fun you two" Ron said to the step-brothers "and tell Perry that Rufus was sorry he missed him."

"We will" Phineas said.

After some hugs, the three kids waved goodbye to their Middleton friends and headed into the family car.

"Well, did you three have a good time?" Linda asked from the front seat.

"Good can't even describe it" Candace replied "I made friends with an internationally known teen hero. I so cannot wait to tell Stacy everything when we get back."

"We had fun too mom" Phineas said "Kim's brothers are smart like us."

"And just as annoying" Candace added.

"Still, I can't wait to get home" Phineas continued, ignoring his sister, "I'm really looking forward to seeing Perry again. It sounded like Isabella was doing a good job of watching over him though."

"Sounds like you had quite the adventure" Lawrence said, as the car headed off down the street "perhaps we should let you kids go out of town more often."

"Kim does seem like a nice girl, although I'm skeptical of the whole 'teen hero' thing" Linda added "one teenager can't save the world. And besides, the idea of people existing who want to take over the world is just silly."

"Yeah, real silly mom" Candace replied, nervously.

The three siblings looked at each knowingly, silently confirming that they would never say anything to anyone about what they had experienced in those few days. It was a strong connection between sister and brothers; then Candace spoke up.

"I hope you two didn't pick up anything from Kim's brothers" Candace said "or you are going to be in so much trouble!"

"Actually, they did give us a few suggestions" Phineas replied "for example, we were thinking of creating our own language, like theirs. We haven't worked out the details yet though."

"How do you say 'I'm telling mom' in your new language?" Candace asked.

"I told you, the details need work" Phineas explained.

"This is going to be one long car ride" Candace groaned.


Meanwhile, back in Danville, Dr, Doofenshmirtz finally returned to the Doofenshmirtz Evil Incorporated building.

"Well hanging with Dr. Drakken was fun, but it's nice to be back at the old lair" he said, dropping his suitcase on the floor "and the exterminators did a really good job, I don't see a pest anywhere."

Then he noticed a note on the table. "What's this?"

Dear Mr. Doofenshmirtz

As per your request, we have fumigated the entire building. However, due to its' massive size, we overestimated the amount of time necessary for it to be inhabitable again. Therefore, it will take four days instead of three, as we had previously mentioned. We caution you not to return to the building early, or you will be affected by the spray.

Sincerely

Manny's House of Bugs

"Looks like I should've stayed an extra day" Doofenshmirtz said "but I mean, it's been three days, the gas must be mostly gone by now. So, I guess I have nothing to worry about."

Doofenshmirtz then sucked in a big breath of air. "Aah, smell that fresh air. Actually, it smells kind of funny" he said "and it's making me…yawn…sleepy. Time for night night" he said, before collapsing to the ground in slumber.

The End.