When Kim had begged, pleaded and outright whined for Wade to reverse engineer Draken's TV surfing tech, he had assumed that she had wanted to have some one on one time with one of those teen wolf/vampire/zombie whatever supernatural creature girls were gushing over these days, since she'd also had him mod it so that she could replace a star in the show instead of just being a extra. 
As it would turn out he was only semi right, she did want that close up interaction but her show of choice wasn't a romance filled one but her favorite show growing up that she still loved today: the get along Kindergarten pals.She'd be taking on the role of her favorite character, a new girl with glasses and braces and a VERY special problem who was likewise named Kim/Kimmie. 
"OK, I've got the tech all set to go, a auto pull out for when the tape this is on is over.. the door to my room is locked.." Kim said out loud, ticking off her check list on her fingers. "I'll instantly get the wardrobe change once I'm inside and I should have the house to myself for 45 minutes, the episodes only play together for 35.. Yeah I'm good." 
Smiling brightly to herself and fast forwarding to just as the opening credits would be ending Kim hit the switch and was in, missing how 3.5 seconds after she was gone Tim and Jim opened her door. 

"Only took 20 seconds. new personal best!" Jim said, smirking to his twin. 
"the more advance she makes it, the easier it is." Tim laughed and then both spotted the screen.  
"Ha! Knew it!" they both said in unison, having known how much of a nerd their sister was for the show and having heard wade mention the add-ons he'd made. 
Setting up a take on a VCR add on to the old Kim was using (the show hadn't been popular enough to get put out on DVD) the twins smirked as they recorded their sisters frame and glory, remotely downloading it to their own computer so they could post the very special episode with Kimme as the star. 
"we should of brought snacks." Jim complained as they sat on her bed.
"eh, No one's perfect." Tim replied, neither of them wanted to miss a a second of this.

Kim squirmed softly as she stood at the front of the classroom, soaking in the familiar light brown plush carpet, the blackboard and all the posters on the walls encouraging reading and how there was no I in team. She was in a pair of pink Velcro sneakers and purple leggings that came up to her mid upper thigh's, disappearing under her puffy dark pink skirt. It only looked like she was wearing a purple t-shirt though as in truth it was a purple diaper shirt she was sporting, helping to hold up the bulky white plastic diaper that was hidden for the moment. 
Her hair was in twig pig tails, one with a pink scrunchie and the other with purple and her coke bottle glasses  had a purple frame (though thankfully Kim could see just fine though them. 
"Class, this is Kimmie. she's just moved here from Canada. what do we say?" Asked the 20 something teacher Mrs. Jewels, a kind blond haired lady who wore said blond hair in a long ponytail down her back. 
"Welcome Kimmie!" the class said all together, most of them just back round extras but Kim could spot her heroes up front.

-Short spiky brown hair and wearing a ninja turtles t-shirt and blue jeans was Alex, the main male character, a helpful little guy who tried to solve everyone's problems. 
-Brunette hair in a perm and green eyes and a green dress was Megan, the main female lead who was a girlie girl but one with a heart of gold. 
-A little bit chunky and with a dirty blond mullet and sporting a stained red t-shirt and black jogging pants was Ralph, the former bully of the class who had been talked into trying to be a good boy. 
-last but not least, with red hair also in pig tail and wearing blue jeans with holes in the knees and a sports jersey was Shelly, the best athlete in the class. 

"H-Hi everyone! I'm looking forward to being friends with ALL of you!" Kim gushed, meaning it as she had wished she could of been part of their group back in the day, but would settle for the time she'd have now. 
"Class I'll point this out now, Kimmie here has a special little problem, and it's one I don't want any of you to make fun of her for." Mrs. Jewels  said, surprising Kim a bit as she could of sworn the diaper thing wasn't brought up until the first accident. 
"Uh..Mrs. Jewels.." Kim started to speak up, blushing a little. 
"Kimmie here hasn't QUITE mastered the potty yet, and still needs diapers, and doesn't always know when she needs a change. so should she smell a little bit..er.." And Mrs. Jewels paused as giggled filled the room. "Less then fresh shall we say, then you just need to tell me or point it out to her so she can come and see me for a change. can you all do that for me and little Kimmie?" 
the giggles got louder but cries of "of course!" and "For sure!" filled the class room as Kim blushed and squirmed, apparently her popping in was changing things slightly. 
"What do you say Kimmie?" Mrs. jewel's asked the red faced teenager who was posing as a 5 year old. 
"Uh..Thank you all! and uh..I'll.." and she gave a nervous chuckle and rubbed the back of her head. "Try not to stink up the classroom too much!!" 
the kids loved that she could poke fun at herself and the pal's scooted to make room for her to come and have a seat next to them but Mrs. Jewel's cleared her throat. 
"Now then, who's ready for finger painting?" She asked, and hands shot in the air, cries of "me!" filling the room and Kim got in on it, not realizing with her jumping and eagerness she was giving at least half the kids a view at her puffy butt..at least until Ralph spoke up.
"Oh! Mrs. Jewels! I don't think Kimmie's wearing her diaper! all I saw was purple when she was jumping up and down!" He cried out, trying to be helpful. 
"eek!" Kim yelped and tugged at the skirt, sinking to her knees quickly. "Don't look at my butt!"
"heh..Kim Ralph was only trying to be helpful..and Ralph Kim's wearing what's known as a diaper shirt to keep her diapers nice and snug when she wets them." Mrs jewels said, and Kim whimpered.  "oh Sorry Kimmie, that was more then you wanted everyone to know huh?"
Kim sniffled and nodded her head, but then she was being hugged by Alex and Megan. 
"Hey it's ok! everyone has problems sometimes!" Alex said, giving her a BIG smile
"Yeah, plus you look adorable! I'm jealous!" Megan added. "Maybe I'll ask my parents for a diaper too!"
Kim could tell the little girl was lying but the sentiment was there and she couldn't help but break out into a big silly giggle.
"hehehe aww..thanks!"

"Ugh, barfaroni.. I was hoping she was gonna break down bawling there." Jim said, faking a gagging noise. 
"Give it time..our machine isn't JUST recording her after all, it's making a few  changes to the show.." Tim said, a evil twinkle in his eye.
"Ohhh? what DO you have planned brother dear." Jim asked, his attention back up to full. 
"well, know how in the normal episode Kimmie just wets her diapers?" Tim asked, grinning ear to ear.
"No, I never really paid at- wait..you didn't!" Jim said and then shared the grin. 
"yeah I did.. things are gonna get stinky~" 

Finger painting had been a blast and after washing up Kimmie had been allowed to pick what they read for story time (She picked beauty and the Beast) then they were sent off to their desks (Really just long tables) and handed pencils and little journal books to write about what they had thought about the story.
Kimmie could of gone on forever but knew they were only expected to write a paragraph or so and was tapping the eraser of her pencil on her chin when suddenly her butt just got super warm. 
Not quite figuring out what was happening she squirmed around in her seat, leaning forward to try and escape the heat on her bun when it got even hotter and a bad smell started to fill the room, making her wrinkle her nose. 
'ew, who farted?!' Kim thought, looking around as the other kids all started to take notice of the smell now. 
it was only as more and more eyes turned to her and she realized her butt felt all muddy it clicked in her head what she'd done, and it was too late for her to try and save face and fess up as Shelly raised her hand even as she spoke up.
"Mrs. Jewels, I think Kimmie made a uh-oh!" She cried out. 
"oh dear.." Mrs. Jewels said, walking over and helping the blushing teen hero stand up, tugging the back of Kim' s Skirt up and patting her hand on the seat of Kim's mush filled diaper. as the super spy whined and popped her thumb in her mouth, blushing crimson and eyes welling up with tears. "Yup, I think your right.. Awww don't cry Kimmie, you're just a little girl and can't help it!"
Somehow this didn't help make Kim feel better and the flood gates opened up as not only was she lead off for a diaper change, but the get alone kindergarten pal's came with to help out.

Jim and Tim turned away in disgust, just in case the change was fully shown but thankfully it would just cut to the different kids trying to be nice, even as they made faces and one of them had the 'honor' of running Kim's smelly diaper out to the trash so it wouldn't be stinking up the class room all day. 
with princess stinky changed and in a clean diaper, a semi broken Kim was brought back to the classroom, with the show only having a little bit of it's run time left. 
"Huh.. you think she's gonna stay broken when she gets out of there?" Jim asked, as Kim was basically being treated like a baby doll now, mumbling and drooling on herself. 
"I dunno,..Maybe. why, you think we're gonna have to look after her?" Tim asked.
"Actually I just a horrible horrible thought.. If she comes out of there and see's what we've done.. including making her diaper famous.. and she's a kick butt super spy.." Jim said, noting that the ending music was starting.
"..Oh balls. Uh.. Yeah, let's get the feck out of he-" Tim started to say, but it was too late and Princess stinky was back out of the show, and looking at them. 
"Ah ba da boo?" She asked, eyes glazed and then blinking them rapidly, blushing and trying to cover up as she looked at the tweebs. "What are you two doing in my ro-" She started to ask, then noticed the whole set up they had going. "..What did you two do?" 
"We love you!" the tweebs said in unison and then tried to run, but even in her thick diapies Kim was so much faster then them and had them both by the scruffs of their collars.
Looking at the comments on the now ended live stream of Kim's little adventure, and knowing that she was ruined, Kim whimpered and whined, but then got a very..very evil smirk on her face. 
"You know.. one diaper princess seems to be very popular on YouTube.. I wonder how twin sissy baby princesses would do?" She asked.
"You wouldn't!" Jim squeaked out, kicking his legs and in full panic mode.
"This was all HIS idea!" Tim yelped, doing the same. 
"Save it baby gurl's you both have a date with diapers.. we can do this the easy way where you take your punishment like -snort- men.. or.. I still have mind control chips and I'll have you two singing Mary had a little lamb in the park." Kim chuckled, sounding so much more evil then her current attire would of suggested. 
as the tweebs started to bawl and whine, Kim couldn't help but wonder if Maybe she'd make a good super villain with a diaper gimmick. 

When Mr and Mrs. Possible came home, the last thing they expected to see was all three of their children having a tea party in the living room. Kim had never been that big on them and well, the twins weren't know to be that girly. 
Of course just the fact there was a tea party at all was surprising, but the fact that all three where in short princess style dresses and thick pink diapers also was a double take.  (Red and green for the boys, and light black for Kim, with a gold toy crown on Kim's hear and silver crowns on the boys.
"..Do I wanna ask or just walk away?" Mr. Possible asked, smirking. 
"Oh Hi Daddy, Me and the boys found out we all had a shared interest and decided to indulge in it. we're even making a few videos'." Kim said, and looked at the twins, giving them a look. "Right my little princesses?"
"..Y-Yes Queen Kimmy!" Tim yelped out.
"I still think you should be just a princess too!" Jim huffed, getting a look of amusement from Kim and one of 'really?' Tim. "What!? all things being fair.." Jim huffed.
"Heh.. Ok you can be the queen next time." Kim said. 
"Well as long as your all having fun.." Mrs. Possible said though then she added. "But for the record, Your father and I did our time changing diapers. so your changing yourself." 

And so from the flood of videos, all three possible kids became known as the pampered trio, with Ron having to handle more then a few smelly diapers and Bonnie trying and failing to embarrass Kim over the videos, Kim having just accepted she was a dorky big baby girl who, as she pointed out, could STILL cream Bonnie in a fight and plant her muck butt on the brat's face. 
Naturally Bonnie backed down after that.
Ironically super villainy died down for the most part after Kim became diaper famous since no one wanted to be the villain that got his or her butt kicked by a diaper filling big baby who's trademark outfit had gone from a top and cargo pants to a baby dress and massive huggies. 
The tweebs after awhile embraced the sissy baby life (well, Jim faster then Tim) since there was no going back and actually found themselves a pair of boyfriend's in the twin hero's Wego from team go as they were free to mostly retire again because of a lack of villains. 
"Who knew that all it would take to stop the worlds villains was a kick butt pamper princess?" Kim giggled. 

The end