Disclaimer: As usual, I do not own American Dragon: Jake Long, Phineas and Ferb, Kingdom Hearts, any other existing franchises/fanfics I mention/borrow ideas from, or any of the associated characters and locations.

If I reference any existing fanfics its because I like a particular idea, so credit for those ideas go to those authors.

Chapter 1: House Guests:

Tri-State Area - Flynn-Fletcher Household

It had been a typical summer day at the Flynn-Fletcher household. Candace came to her mother claiming Phineas and Ferb had built a portal to Mars and that she had become its queen. But, as usual, when their mother Linda arrived there was no evidence that proved any of what Candace had seen. Lawrence had just finished explaining that a friend of his from college and his family would be staying in Danville that week when Linda spoke up.

"Speaking of old friends from College," she began, "my old roommate Violet and her family are moving back to New York tomorrow after living in Hong Kong for a year, and they'll be in Danville at the same time."

"Wow," Candace replied sarcastically, "a week filled with complete strangers talking about boring stuff that stopped being cool decades ago."

"Don't worry, kids," Lawrence said, "they both have kids close to your ages, so if you don't want to listen to a bunch of embarrassing stories from where your parents were in college, you can talk to kids your own age about the latest trends or whatever you want to talk about."

"Great," Candace replied, immediately switching into gossip mode. "We can talk about boys, dating, and maybe bust Phineas and Ferb for whatever outlandish contraptions they build."

As the family talked about what they'd do that week, they also wondered about what their guests would be like.

Hong Kong - Airport

Jake gazed longingly out the window of the airplane as he fastened his seat belt and the last straggling passengers made their way to their seats for the flight out of Hong Kong. His parents, grandfather, and sister sat a few rows in front of him, Trixie and Spud a few behind, and he was all by himself. His thoughts, however, were far from the flight. Despite a fantastic dream date after the battle at Victoria Peak, he hadn't seen or heard from Rose since then. He was worried. Both that he'd done something to upset her, and that something had happened to her. He was so wrapped up in his own thoughts that he failed to notice a familiar blond walking up the aisle towards his seat.

Rose trudged up the aisle with a dreary look on her face. Her dad had gotten the call that they were moving out in six days the morning after her reunion with Jake, and so the whole family had scrambled to get everything packed. She didn't have time to see Jake during the day, and her dream charm had been thrown in a box during the whirlwind of packing, so she had no way of letting him know what was going on. She felt bad about not calling him, but between packing and saying goodbye to her friends, she was just exhausted. A grumble from behind her jolted her back to reality as she resumed counting off the seat numbers as she made her way towards the back of the plane. Like Jake, her family had been scattered throughout the plane. Great, she thought, twelve hours in a cramped seat sitting next to a complete stranger. Her exasperation quickly turned to shock, and then again to joy when she saw the row number on her side of the plane (she had a window seat near the back of the aircraft), and then looked down to see a familiar flash of green hair and red cloth sitting in the aisle seat. I take it all back; she thought to herself, I think I'll actually enjoy this flight.

Tri-State Area - Coffee Shop

Fury chuckled to herself as the nest of snakes that was her hair hissed with happiness under her rather large hat. That girl just had to post her vacation plans online, didn't she? she thought to herself as she sat in an internet café in Danville re–reading Trixie Carter's latest blog post, announcing her departure from Hong Kong. She'd been running from the magical world for weeks since her humiliating defeat at the hands of the American Dragon, that admittedly charming British Wizard, and that pathetic, lovesick mortal. Her sisters were statues at the bottom of the Manhattan harbor, and although she still possessed some of her powers, nobody would offer her shelter. After living in the woods for weeks, she'd been on the brink of surrendering herself to the Dragon Order and spending the rest of her life in a prison cell when she happened to discover a blog by that girl whom the American Dragon worked with saying that she would be in Hong Kong with the dragon's family for a few weeks before flying to some town called Danville.

With that new information, Fury quickly began formulating a plan to get revenge against the dragon as she made her way to Danville. As she hitchhiked across the country, she had gotten in touch with some local scientist to play a role in her scheme. Once she arrived, they'd arranged a meeting at an internet café a few blocks from his lair. She'd been waiting for the past twenty minutes for him to show, and she was beginning to grow angry at being stood up. She was just about to storm out of the building when a human entered the room.

He was a tall man, with balding brown hair, a long, pointed nose, and a large chin. He was wearing a white lab coat over a black shirt and grey trousers. She was about to shove her way past him and leave when he stopped her.

"Excuse me," he said with a high-pitched, nasally voice, 'but I'm looking for a woman named 'Fury'."

"Oh," she replied as she shook his hand, "You must be Doofenshmirtz, then. I was beginning to think you'd never show up."

"I'm terribly sorry that I'm so late," Doofenshmirtz interjected as they walked over to a table in the back where they were unlikely to be overheard. "You see, I had just finished setting up my latest scheme. I was just about to come down to meet you when my nemesis burst into my lair and I had to fight him off before I could get down here. You understand how it is."

"I understand," Fury responded as her potential ally offered her a cup of coffee. "Every villain runs into problems with their foes. Anyway, let's get down to business. You remember our agreement?"

"Yes, I do," he replied. "I help you lure your nemesis into a trap for you to exact your revenge. In exchange, you help me take care of mine."

"Are you still certain you want to join me? You do realize that, once I've defeated my enemies, I intend to conquer the world."

"I'm more interested in conquering the Tri-State area than I am the world because of all the traveling I'd have to too. Never the less, as long as I can have the Tri-State Area all to myself to rule, I'm on board one hundred percent."

"Then it's a deal!" she exclaimed. "While we're here though, I'd like to ask you something. I'd hate to impose but I have nowhere to stay. I've been roughing it for the past few months, I'd like a roof over my head for a change."

"Sure," he replied. "My lair is your lair."

"Thank you," Fury said as she let out a sigh of relief. "It's been ages since I've experienced the comforts of civilization. Now Doctor, I have one more thing to ask you before we get started. Do you believe in magic?"

Hong Kong - Airport

"Excuse me," came a voice that jolted Jake out of his moping, "but I need to get into my seat."

He turned his head and looked up, and there she was.

"Hey there," he said, a combination of surprise and joy written all over his face

"Hey yourself," she replied.

"So I take it you're flying back to New York this week?" he added as he got up to let Rose slip into the seat beside his.

"Yeah," she answered as she sat down, "we got the call first thing in the morning the day after we fought the Dark Dragon. I'm sorry I didn't tell you sooner, but my dream charm got thrown into a box in the craziness of packing, and between the packing and saying goodbye to friends and neighbors, I've just been too exhausted to pick up my phone and call you."

"It's okay, you've forgiven me for worse," Jake responded as he sat back down and buckled up while the flight attendant began making the usual pre–flight announcements. "Besides, it wasn't something you could control."

"Yeah," she replied as the flight attendant finished the pre–flight announcements and instructions. "Just a heads up, I won't be flying straight to New York. Once we get to this Danville place, which for some reason I've never heard of until now, we'll be staying for a week visiting one of my mom's college friends."

"Actually," Jake added as the plane began taxying to the runway, "I was about to say the same thing."

"Wow," Rose said with a chuckle, "so not only are we leaving Hong Kong on the same day, on the same flight, sitting right next to each other, but we're both going to the same place for the same time period for the exact same reasons."

"It is a freaky string of coincidences, but you don't hear me complaining," he replied.

"I never said I was," came her blunt reply.

"I'm so sorry," he quickly tried to apologize as he realized what he'd done, "I didn't mean…"

"Relax," she interrupted with a reassuring smile, "I was just messing with you."

"You scared me there for a minute," Jake replied, "But I still shouldn't have said it," he finished with a regretful look on his face

"Come on, Dragon Boy," Rose teased, "I've forgiven you for worse."

"Yeah," he said, laughing at the irony of her telling him the same thing he'd just told her a few minutes ago. "Although now we really do need to come up with a way to explain our relationship to your parents."

"I think I've got an idea," she suggested.

As Rose launched into a long – winded explanation of her idea for an excuse, she and Jake leaned closer together and talked about what to say to her family until they fell asleep. It was going to be a long but pleasant flight.