Yes! Alright! FINALLY! I got this story going! I've so wanted to do this story for such a good while! And after some considered planning, I am NOW writing it! :D

As you can see, this is a Kim Possible/The Dark Knight's Jokerfusion story, meaning that ONLY The Joker is gonna be included in the KP universe. And let me just say this first and up front; this story will get dark in due time. Maybe even enough to be put the story in the M rated category. I mean, this is"The Dark Knight"Joker we are dealing with here, so…yeah. :P

Also, just giving you all a heads up, the Lowardian invasion DID NOT HAPPEN. There was no invasion, no aliens, no nothing. Don't worry, the episode 'Graduation' DID happen…just under different circumstances, which I will reveal later on! ;)

Anyways, here we go! Everyone, prepare yourselves for one wild ride! Here's hoping you all like this! Enjoy! :D

(By the way, this is my first KP fanfic. I hope I've done the characters justice! :O )

Disclaimer: Kim Possible is owned by Bob Schooley, Mark McCorkle, and Disney. Christopher Nolan's The Dark Knight, and the Joker are owned by DC Comics and WB Pictures. This story idea, however, is mine. ;)

-Why So Serious, Kim?-

Above the clouds, a soaring airliner soared through the night sky. Some of the passengers were asleep, while others were awake, watching the in-flight movie. Around the right side of business class, a beautiful auburn-haired young woman was sleeping peacefully, leaning her head on her pillow next to the window. Sitting next to her, a quietly animated, short, blond-headed young man was watching the movie with his headphones on.

"And…oooh! Yeah! Deliver that punch like it's hot!" the young man whispered loudly, mimicking the punches as he watched.

The girl stirred in her sleep, eyes fluttering open. She moved her eyes and head slightly to her left to look at the boy that was seated next to her, who was completely involved in the movie. She smiled faintly at him, fatigue trying to cast a spell on her, but was now fully awake. She sat up slowly, yawning and stretching in her seat, and turned to the young man, who in turn noticed the movement out of the corner of his right eye. He turned to her and gave her a cheerful, but sheepish grin.

"Oh! Uh, heh…um, sorry Kim. Did I wake you?" he asked, feeling embarrassed.

The girl named Kim chuckled and said, "Don't worry about it, Ron. I needed to wake up anyway." She stretched again, loosening the kinks in her joints. She turned to Ron with a smile and said, "So, what are you watching?"

Ron smiled back, "Ah, just a generic action film. The dialogue is atrocious, but the action is pretty good."

Kim giggled, "You seem pretty involved in it."

"Heh, well, you know, the Ronster's got to meet up to the villains' expectations when they're ready to take me on!" Ron joked.

Kim smirked slyly. "Really? Well, I'll keep that in mind when I'm trying to steal a nacho away from you."

Ron did a mocking gasp. "Kimberly!"

Kim laughed, "No, but seriously, it seems like you've improved. When we were fighting Drakken's goons that one time in Spain, you kept up with their hand movements really well."

"Ah, I still kind of goof up every now and then," Ron said, blushing slightly from Kim's praise and rubbing the back of his neck bashfully.

"But you still get back up. And that's one of the things that I really admire about you, Ron. I mean it, you've definitely improved," Kim said as she smiled warmly at her boyfriend.

Now Ron's face was bright red as he nervously laughs. "Well…you obviously have better traits than me. I'm just on the side. I mean, you were offered a job at Global Justice!"

"Oh come on Ron, you were mentioned too!" Kim reminded him. "Dr. Director was really surprised by how you handled yourself."

Ron chuckled softly, face still red. "Ah, I just try not to get myself all beaten up. I'm not all that special," he shrugged. "I still think that you would be the better candidate for the job, Kim."

Kim smiled solemnly at Ron, "Ron…" She said as she put a hand on her boyfriend's shoulder. "Really, you need to have some self-confidence in yourself. You help me more than you know. It wouldn't be Team Possible without you. I honestly couldn't ask for a better partner or a better boyfriend."

Ron smiled warmly at her as well. "Well…okay, maybe I did alright, I suppose. And don't worry KP, I'm getting there with the self-confidence bit. I just think you're the better fighter than little ol' me." Ron leaned back in his chair, still gazing at Kim. "Still, that's a big honor coming from GJ."

"Hm. I guess stopping her brother from mind controlling all of Global Justice and taking control of Middleton was the winning touch, huh?"(1) Kim said as she leaned back in her chair too.

"Yeah." Ron frowned for a moment. "Man, right when we were having graduation, too. That Gemini is a jerk."

"Well, he's definitely not bothering anyone now." Kim reminded him. "I made sure he was sent to one of the most secure prisons in the country."

"Heh, man, it must suck to be him right now." Ron smirked. Looking straight ahead, he sighed. "Wow, I can't believe we're actually going home right now."

Kim looked at him, slightly puzzled. "Ron, we were just in Hong Kong for summer school. It wasn't that long, only around a month and a half."

"Hey, working as a culinary student is actually tiring." Ron defended himself. "I take the art of food very seriously, you know?"

"Uh-huh," Kim said drolly as she smirked at Ron teasingly. Believe it or not, Ron has been accepted in a cooking academy in Hong Kong, The academy must've seen his show back in his sophomore year and decided to give him an application to the school. "Well, I do find it really great that you're majoring in something you absolutely love."

"Heh, I'm just glad we're attending institutes of higher learning in the same city! Although I might consider myself very lucky to not be in your shoes right now," Ron joked.

"Ugh, don't remind me!" Kim said, leaning back and planting her hand on her forehead. "I mean, I know being a diplomat is hard work, but all this learning about international politics is making my head hurt!"

Kim as well was accepted to one of Hong Kong's fine learning institutes and was majoring in diplomacy. She founds it interesting, what with how many countries negotiate and communicate with other, but it was also stressful and taxing. Like her family motto though, 'Anything is possible for a Possible.'

"Well, hey! At least you're doing it to help people!" Ron reassured her with a smile.

Kim chuckled softly and turned to Ron, returning a smile as well. "Yeah. That I am, Ron."

They sat there, relaxing in their seats, both of them thinking.

Ron sat in his seat, reflecting on his time in Hong Kong…for different reasons.

Even though he was accepted to a culinary academy in Hong Kong, Ron wouldn't have been there thanks to his sensei at Yamanouchi for mentioning him. The reason why he did that was because his sensei had connections to one of Hong Kong's advanced martial artists, a good friend of his during his old dojo days. He agreed to teach Ron and let him catch up on his old training. Not only was he rushing back and forth between his cooking classes, but afterwards he would have to go to this said friend's house/underground dojo in the city to work and improve on his fighting skills, with the exception of unleashing his Mystic Monkey Powers. It was a difficult process for him to go from one place to another, juggling school and doing his training, but then add to the fact that he still went on missions with Kim. It was definitely overkill for his schedule. But all in all, he had to say, he really thought that he had improved, like Kim had said. His reflexes were better, he could actually deliver some kicks and punches to his foes, and best of all, he wasn't losing his pants every time. All that training he went through with his sensei at the time (whose name was Gou You(2)) had made him a more capable fighter. When the Gemini takeover happened during their graduation, he made it his sworn duty to protect Kim from any threat that was thrown at them. Even though Kim could handle herself, and this he knew, he still wanted her to know that he'll always be there by her side, protecting her from anything.

However, Ron felt like he couldn't let Kim know about his training in Hong Kong just yet. He wanted to keep it a secret for now. He didn't like keeping secrets from Kim, but he still wanted to let her call the shots in their missions. She was the leader, and Ron didn't want to get in the way of that. Besides, she was better at that job than he was. He figured that he would only bust out the moves when Kim was in serious danger.

As for Kim, she was also reflecting on past events, recalling the aftermath of their graduation and the Gemini takeover in Middleton…

(Flashback)

"Ah, Bueno Nacho! Thank goodness you weren't harmed during the chaos and destruction!" Ron said, gazing at the fast food restaurant lovingly.

It was the day after Gemini's takeover and people were still recovering. Thanks to Kim and Ron's valiant success for defeating Gemini and his cronies, the city of Middleton awarded them with a day of free spending at any of the places in town. Ron jumped right at the opportunity first to go to Bueno Nacho for a free 'Lunch Feed Fiesta', as Ron aptly called it. Kim decided to go with her boyfriend to make sure he didn't overindulge himself. Kim knew that Ron's love for everything Bueno Nacho was certainly untamed, but she did told him to eat the right appropriate portions of what he normally ate. Ron agreed, albeit hesitantly, but was loyal to his word. They were now in front of the restaurant, with Ron taking a moment to regard his favorite eatery in all of its glory and reminisce the fact that it was still intact.

"I am starvin' for some party sized nachos right about now! And the best part of it all, is that it's all FREE!" Ron cheered. "Woohoo! We definitely need to get rewarded like this more often!"

Rufus popped out of his pocket and nodded vigorously, tongue hanging out. "Mm-hmm! Party size! Free!"

"Hold your taste buds, Ron. Remember; don't go overboard with the selection," Kim reminded her boyfriend.

Ron sighed sadly, "Yes ma'am."

Kim smiled at Ron as they were about to enter Bueno Nacho…

…until they were sucked up by transportation tubes from the ground!

"Whoa!" Kim yelled.

"Aaaugh!" Ron yelled as well.

They were both sucked in…

As they swerved through transportation tubes, they eventually landed on some plush chairs.

"Oof!" Kim and Ron collectively said. They examined their environment. It looked to be a very nice and opened office, completed with a large U-shape bookcase surrounding a dark wooden oak desk with a seal in front of it that has the initials of Global Justice on it, GJ. A chair was facing its back against the two young adults behind the desk.

"Welcome back, Kim Possible, Ron Stoppable," said a refined voice, as the chair turned to face them, which the person sitting on the chair was none other than Dr. Director, who was also known as by her real name, Betty.

"Dr. Director?" said Kim a little surprised.

"Whoa, nice office, Dr. Direct!" Ron complimented as he looked around the space. Rufus popped out of Ron's pocket to look around the room and whistled.

"Thank you," Betty said with a smile. "I have called you two in my office to discuss personal matters."

"Um…okay," Kim said hesitantly. "What about?"

"First off, I want to thank you and Ron for completely handling the situation with my rougue brother, Gemini. I've seen to it that he will be in the most heavily secure prison in the country. You not only saved your town from that maniac of a brother of mine, but perhaps the whole world. I dread to think what he would have done if he mind-controlled all of our Global Justice agents," Betty said, her elbows on her desk, with her hands clasped together beneath her chin.

"Uh-heh, uh, yeah, that, um…wouldn't be a good thought," Ron grimaced.

"Oh, no big. Me and Ron just gave it our all," Kim said with a nonchalant wave.

"Although he did ruin our graduation ceremony," Ron said with a frown.

"Ah, yes. Your graduation ceremony. How was that after you resolved the situation?" Betty asked.

"Um…" Kim started, wondering what this meeting was all about, "It was…nice…?"

"Oh yeah, it really went well after all that takeover stuff! The city was really grateful, of course, and after that, the city let us have free access to anywhere we go in town for a whole day!" Ron said with a grin.

"Hmm. And my calculations were correct as to where you would celebrate your victory," Betty said a knowing smile.

Ron chuckled. "Ah, you know us too well, Doc."

"Um, excuse me, but uh," Kim said raising her hand as if she was in school, "I don't mean to sound rude or anything, but…was there a reason why you brought us here?"

"Ah, straight to the point! I like that," Dr. Director smirked as she stood up from her seat and began explaining. "You see, Global Justice wants to congratulate you two on a job well done on all of your missions. You two have successfully stopped every villainous plot that lurks around every corner of the Earth, including Gemini, in which I commend both of you for your work. Kim, you definitely have great and superb skill, and you showed those skills tremendously yesterday against Gemini's scheme."

"Um…thank you," Kim said with an appreciative nod and a small smile.

Dr. Director turned to Ron. "And you Ron have surprised us as well with the amount of skills that you demonstrated during Gemini's reign. You certainly improved yourself in due time," she said to Ron with a smile.

"Oh, well, uh, heh," Ron nervously laughed a bit. "I uh, I get by at times." he said a little sheepishly with a small grin.

Dr. Director nodded with smirk. "That you do." She faced them both again and said, "Now, the reason why I called you all here, is that I would think you, Kimberly Anne Possible, and Ronald Stoppable, would be an exceptional and beneficial addition to Global Justice."

Kim and Ron's eyes widened at the offer. Rufus gasped.

"You…want us to be a part…of GJ?" Kim asked in shock.

"Whoa…a-are you serious?" Ron stuttered as he sat there stunned.

"Indeed I am," Betty answered both of their questions with a smile. "I think both of you would make outstanding agents in our organization. You two are old enough to apply, and you two stopped Gemini with such expertise and bravery that I have no doubt in my mind that both of you would make excellent additions," she said, having great confidence in them. "What do you two say?"

Kim and Ron sat there, astounded that they achieved this honor. They glanced at each other, seeing if they have the same reaction to this. Kim snapped out of her daze and shook her head to clear it. "Wow…uh…"

"Bon-diggidy man, that's um…" Ron said as he put a hand to his head to comprehend what was offered to him.

Kim sat there and looked down to stare at her feet and to thought about it. This definitely was a big honor for them. But were they really ready for this kind of lifestyle right now? What about their families? Their friends? …Their goals in life?

Kim glanced up at Dr. Director. "...Um…well…" she sighed, "Dr. Director…as much as the offer sounds tempting, I…I'm afraid I'll have to pass."

Dr. Director frowned sadly but listened with interest. "Really?"

"Yeah, you know, I'm with KP on this. Sorry, as awesome as that really sounds, we kind of have to get ready for college and all of that," Ron explained to Betty.

"Yeah. Ron and I are going to Hong Kong next month for summer school, and I don't think now would be a good time. This is also a big decision for Ron and me to think about. I mean, if we take this job, we wouldn't be able to see our family and friends all that much. Don't get us wrong, we're very flattered, but…like I said, I don't think now is a good time to go into the secret service business," Kim said, putting her two cents in.

"Oh…" Dr. Director nodded understandingly. "I see. Well, I can't say that I'm not disappointed, but…I wouldn't want to let you all join Global Justice if you were unsure. It is true, this decision is quite a handful for you two to decide, and both of you do have your whole life ahead of you. And education is important…I honestly actually thought that you all haven't decided on what you all wanted to do yet," she said, smiling softly. "Well, if you two ever feel like joining Global Justice sometime in the future, the offer is always on the table."

Kim smiled kindly. "Thank you, Betty."

"Yeah, thanks Doc!" Ron said with a grin as he chuckled, "Wow! Don't I feel special! I've been selected to join GJ!"

Rufus crawled up to Ron's shoulder and cheered for him and patted the back of his neck.

Dr. Director chuckled as she said, "Well, I guess this meeting is adjourned then. I should go ahead and send you two back to your destination. I really do hope we cross paths again soon." Betty smiled at the two. "May you two succeed in accomplishing all of your goals. And again, the offer is always on the table."

"Sure thing, Betty," said Kim nodded with a smile.

"You bet!" said Ron also smiling with a 'thumbs up'.

And with that, they were sucked up back to their intended destination.

(End Flashback)

"Attention passengers, we will be nearing Middleton International Airport in about ten minutes."

Kim snapped out of her reminisce and looked at her watch. She turned to Ron who looked like he had awoken from a brief sleep.

"Almost there, Ron." Kim told her boyfriend quietly as she smiled. "In about ten minutes, we'll be back in Middleton."

Ron gave out a sleepy smile to Kim. "Alright!" he said quietly. "All this international flight stuff is making my butt go numb."

Kim giggled. "You never complained about air travel before when we go to missions."

"Well, yeah, but that's because we go on really fast jets," Ron reasoned.

Kim rolled her eyes comically at him. "Well, keep your butt in check. We'll be seeing our family soon."

Ron felt a stir in his pocket, as the head of Rufus popped out of his pocket with sleepy eyes and yawned.

"Don't worry little guy, we're almost home," Ron reassured, as he petted his little hairless mole-rat buddy. Rufus felt content with that answer as he hummed peacefully back into his pocket.

"I can't wait to see Mom and Dad. Heck, I can't even wait to see the Tweebs," Kim chuckled.

"You can't even wait to see your brothers? Wow, you must be really homesick, KP," Ron said with a smirk.

"Hey, they're family," Kim replied with a shrug and a smirk of her own. "And don't tell me you weren't homesick as well?"

"Aw, come on Kim, of course I got homesick. I miss my Mom and Dad as well, especially Hana! I hope the folks at home are keeping her happy. The phone calls gave me the indication that she was fine." Ron frowned sadly. "Man, she was really sad to see me go."

"Aww, don't worry about it, Ron. You'll get to reunite with her soon enough," Kim comforted him as she held his hand.

Ron looked down at Kim's hand and glanced back at her. A sweet smile formed onto his lips. "I'm really glad you're with me, KP."

Kim blinked at the sudden statement, but gave out a warm smile as well. "I'm really glad you're with me too, Ron," she said as she leaned forward and gave him a sweet kiss on the lips.

Ron giggled as he blushed, making Kim giggle at his reaction. The couple then spent their last minutes on the plane ride leaning against one another, enjoying each others company.

"There they are!" coos an excited Dr. Anne Possible. She and her husband, Dr. James Possible, along with the twins, Tim and Jim Possible, were waiting for Kim, and Mr. and Mrs. Stoppable and Hana Stoppable were waiting for Ron.

"Hey there, everybody! How's the other side of the world?" Ron said as he dragged some luggage towards them.

The Possible family moved to Kim as the Stoppable family moved over to Ron, giving them their hugs and kisses.

"Hey, Tweebs! You all missed me?" asked Kim as she looped each arm around their waists and gave them kisses on the cheeks.

"Ugh! We did a moment ago…" Tim said in disgust.

"But now we're not too sure!" Jim finished in disgust as well.

Kim laughed at her little twin brothers and hugged them.

"Hey Hana! Didja miss me?" Ron asked tenderly as he took her from his mom's hands and held her.

Hana giggled and hugged her foster brother's neck. Rufus came out of Ron's pocket and climbed onto his shoulder, smiling and waving at Hana energetically. The little Japanese girl brightened even more and reached to Rufus. "Ru-fus!" she squealed in delight.

Rufus jumped into Hana's arms as she caught him, laughing as she and Rufus hugged.

"Aw, come on!" teased Ron. "You can say Rufus's name but not mine?" He tickled his adopted sister's tummy making her laugh even more.

"Well, how's the cooking school, Ron? Did you learn anything, or did you end up teaching them?" Ron's father joked good-naturedly.

"Oh, I bet you learn some new wonderful entrées over there!" Ron's mother cooed.

"Heh-heh, you'll have to find that out when I prepare lunch tomorrow!" Ron said with a grin.

"Oh, Kimmy-Cub, it's great to have you back home!" Kim's father said as he gave her a hug. "How was the flight?"

"Whew! Long and tiresome! But the effort was worth it!" Kim answered with a smile.

"Oh, you have got to tell us tomorrow about what you learned over there! I bet the politics over at Hong Kong and China were so different!" her mother said.

"They kind of were," Kim said as she let out a small yawn.

"Uh-oh, looks like Kimberly needs to set her biological clock in order," Anne chuckled at her daughter.

"Yeah, I'll tell you one thing: jetlag only affects you like a ton of bricks when you're really tired," Ron said as he stifled a yawn. They all walked to the baggage claim, conversing to one another.

"I got to tell you Kimberly, while you and Ron were away, I've been working on that-" James Possible stopped in mid-speech and looked around to see if anybody was around listening. Seeing that there weren't, he whispered, "top secret project at the space center! I'm just now putting in the final touches! Would you like to have the first look tomorrow on Monday? You can keep a secret, can't you Kim?" he teased his daughter.

Kim chuckled, rolling her eyes in amusement, "Yes Dad, I can keep a secret. And sure! I want to see what you've been working on for the past few months!"

"Ooh! I can keep a secret! Can I see it too?" Ron asked with hopeful excitement while he held Hana.

"Ronald!" Mrs. Stoppable softly scolded her son.

But James laughed pleasantly at his enthusiasm. "Oh don't worry, it's fine! Sure you can! But you have to keep your word on keeping this project all hush-hush. Can you do that, Ronald?"

"My lips are sealed, Mr. Dr. P!" Ron said, mimicking a zipper with his mouth and sealing it with his fingers.

James laughed once more. "Great! Come on by with Kimmy-Cub around five thirty. The U.S. Government entrusted us with this project, so I hope we did well!"

"The U.S. Government? Wow, it must be something top notch!" Ron said, wondering what it could be.

"Oh, it is! Come on by tomorrow and witness it yourself!" James said. "I can assure you, it is awesome!"

As they picked up their luggage from the baggage claim, they all exited the airport, said their goodbyes to the other family, got into their vehicles, and drove on home.

Kim looked out the window to see the familiar sights of her hometown. She smiled, thinking to herself, 'It's really great to be back home.'

Outside in the airport parking lot, a nondescript man was sitting in his car. He was looking out for Kim Possible. Once he saw her and Ron come out of the airport, he waited until they entered their cars and drove off into the distance. He picked up his cell-phone, pushed the quick call button, and put it up to his ear.

Someone picked up during the first ring.

"Well?" said someone who was speaking through a voice enhancer.

"She's here," grunted the man. "Kim Possible is in Middleton."

"Good. We start tomorrow." And with that, the person on the other line hung up.

Hooray! I am done with the prologue! Now onto the footnotes!

(1) I replaced the Lowardian invasion in "Graduation" with an alternate version of the Kim Possible DS game Kim Possible: Global Gemini. Much thanks to Luke Danger(I think…I forgot, it's been so long. XP ) for the idea!

(2) Just a minor OC. Don't worry, he won't play a big role, he's just there to get Ron up to speed with his training. I did think up a funny name for him though: Gou You! …As in "Go you!"? Haha! Get it!? Eh…heh-heh…okay. D8

Also, many thanks to my beta reader, ekrekeler! :D

Tell me what you all think so far! Don't worry, the next chapter will pick things up real fast, and we'll even get to see The Joker! So stay tuned! ;D

-TSP