Chapter Text
The neon glow of the Bueno Nacho sign cast a lurid, greasy sheen over the parking lot. Inside, the familiar scent of spiced beef, melted cheese, and fried tortillas hung in the air like a delicious fog. For Ron Stoppable, this was paradise. For Kim Possible, it was a necessary evil. She sat across from him in their usual booth, a small, meticulously-crafted salad in a bowl before her.
“Ron, you know, a Naco contains more calories than a ten-minute sprint on the treadmill burns,” Kim said, poking at a lettuce leaf with her fork. She was wearing her mission uniform, a sleek, figure-hugging outfit that perfectly accentuated her athletic build. Her confidence was as crisp and clean as her clothes.
Ron, meanwhile, was in the process of devouring a Naco the size of his head. He chewed with an uninhibited joy that Kim found both endearing and slightly gross. “Yeah, but it’s a super-sized Naco, Kim. That’s why it’s called ‘The Grande.’ It’s a whole new class of caloric goodness.”
Kim sighed, a picture of exasperated poise. “It’s called ‘Grande Size Me,’ Ron. It’s a marketing gimmick. And don't even get me started on the trans-fats.”
She watched him wipe a smear of cheese sauce from his chin, his enthusiasm for the greasy delight unwavering. She couldn’t understand it. She was an elite athlete, a global hero. Every cell in her body was a finely-tuned instrument of justice. Her diet was as disciplined as her martial arts. The thought of consuming something so nutritionally vacant was… foreign.
Meanwhile, in a dilapidated volcano lair miles away, Dr. Drakken and Shego were engaged in their own unique form of bickering.
“But Shego, the bio-accelerator ray is the crown jewel of my villainous career!” Drakken ranted, his blue-skinned face a mask of frustration. He gestured dramatically toward a large, ominous-looking device humming in the corner of his lab. “It can speed up the growth of any biological matter a hundredfold! I’ll fire it at a simple garden pea, and it will become a super-pea-vine that will choke Middleton in its magnificent, verdant tendrils!”
Shego, filed her nails with a green, glowing claw. “Yeah, yeah, grow a city-sized salad. Heard it. But you've never even tested it, Drakken. What if it just turns the pea into a regular-sized, slightly bigger pea? You need a test subject.”
Drakken’s eyes lit up with a wicked glint. “A test subject! Of course! Someone unsuspecting, someone who won’t see it coming…”
“The Stoppable kid,” Shego suggested, with a weary roll of her eyes. “He’s a walking fast-food monument. We fire it at him, and he gets… bigger. Big whoop. Let’s just use it on a plant, and when it inevitably fails, we can move on with our lives.”
“No, no, no, Shego! Think bigger!” Drakken exclaimed. “A simple test is not enough. We need to strike at the heart of our enemy! We’ll use it on… Kim Possible herself!”
Shego actually paused her filing. “And what’s the plan? Turn her into a… a big, muscular Kim? A super-strong Kim? She’s already a super-strong Kim.”
“No, my simple-minded hench-woman, the bio-accelerator isn’t just for muscle! It accelerates all biological processes! Including the absorption of nutrients! I will fire the ray at her… at the very moment she is consuming something… terribly unhealthy. The ray will supercharge the fats and carbohydrates in the food, and her body will absorb them at an exponential rate! It will turn her perfect, athletic body into… a lump of blubber! A blob of… of… possible!”
Shego stared at him for a long moment, a slow, predatory grin spreading across her face. “You know, Drakken, for once, that’s not a terrible idea.”
Back at Bueno Nacho, Kim was still trying to convince Ron to eat his greens.
“Ron, seriously, think of your cardiovascular health. The cholesterol in that thing is… Ron, are you listening?”
Ron’s eyes were wide as he stared past Kim, out the window. “Whoa, check it out, Kim! It’s a flying burrito!”
Kim, ever the hero, spun around, her senses on high alert. A small, unmanned drone, shaped like a burrito with tiny wings, was zipping through the parking lot. She scoffed. “A flying burrito? Seriously?”
“This is a new level of awesome!” Ron cheered.
Just then, a flash of sickly green light emanated from the drone. It was a silent, barely-there shimmer, but it was there. Kim, ever observant, saw it. It hit the Naco she was holding, the very one she had so pointedly rejected. It didn’t make a sound, but a strange, iridescent glow briefly washed over the cheese and beef.
Kim, thinking it was some kind of marketing gimmick, frowned. “Ugh, great. Now my food is glowing. I’m not eating this.”
She went to throw it in the trash, but as she did, a new sensation washed over her. It was a smell, not just of cheese and beef, but of something deeper, richer, and more intoxicating. It was the scent of pure, unadulterated pleasure. Her stomach, which had been perfectly content just moments before, gave a sudden, guttural rumble. It was a hunger she had never felt before, a primal, all-consuming need.
“Oh, what the heck,” she said, her resolve crumbling. She took a small bite of the Naco.
The taste was an explosion. It wasn’t just good; it was the most amazing thing she had ever tasted in her entire life. The spiced beef was savory perfection, the cheese a molten river of salty goodness, and the tortilla shell had a perfect, satisfying crunch. The flavors hit her with the force of a tidal wave, short-circuiting her logical mind and replacing it with pure, hedonistic joy.
She took another bite, then another. She ate the entire Naco, not with her usual ladylike precision, but with a speed and ferocity that surprised even herself. She finished it in less than a minute.
“Whoa, K.P.,” Ron said, staring at her with wide eyes. “You just ate a whole Grande Naco.”
Kim, wiping a bit of cheese from her mouth, felt a pleasant, warm fullness spread through her body. Her stomach was satisfied, but a new feeling emerged. A strange, almost imperceptible tightness in her uniform. She dismissed it as a post-meal bloat.
“I’m not sure what just happened,” she said, her voice a little breathless. “But that was… amazing.”
The next few days were a blur of insatiable hunger and strange physical changes. It started subtly. Kim, who normally had a healthy, light breakfast of an apple and a protein shake, found herself craving… pancakes. Three, with a generous pat of butter and a river of syrup. She devoured them, feeling a brief, blissful satisfaction, only to find herself hungry again an hour later.
She noticed her mission uniform was getting a little snug. She rationalized it as a bad wash cycle, or maybe a slight calibration error. But the next day, after a particularly massive lunch that included two double-cheese pizzas and a gallon of soda, she had to stop and catch her breath while putting on her uniform. It was an effort to zip it up.
Her metabolism, once a perfectly-tuned furnace, was now a bottomless pit. The bio-accelerator ray hadn’t just super-charged the single Naco; it had fundamentally altered her body's ability to process and store calories. Everything she ate, regardless of its nutritional value, was immediately converted into fat, a rapid, runaway process that her body couldn't stop.
“Kim, are you okay?” Ron asked one afternoon as they were walking home from school. He was eating a bag of chips, and Kim’s eyes were fixed on it with a desperate intensity.
“Fine,” she snapped, her stomach rumbling. “I just… I have a mission. I need to go.”
She had a mission to stop a rare-book thief, a simple, low-stakes assignment that she would normally handle in minutes. But as she ran across the rooftops, she felt heavy. Her legs, once a blur of muscle and speed, felt like lead. Her jumps were shorter, her landings clumsier. The familiar joy of her acrobatic prowess was gone, replaced by a growing sense of panic and shame.
When she finally cornered the thief, a simple sweep kick—her go-to move—was sluggish and easily avoided. The thief, a scrawny man half her size, just sidestepped it and laughed. “What’s the matter, Kim Possible? Out of shape?”
A wave of humiliation washed over her. She used her grappling hook to swing away, leaving the thief and the rare books behind. She had failed a mission. A simple mission. It was unthinkable.
Back at home, she stood in front of her mirror, her mission uniform now stretched to its absolute limit. The zipper was a thin line of protest, and the fabric strained against her increasingly soft curves. Her once-flat stomach now had a noticeable swell, and her toned legs had lost their definition, becoming thicker and rounder. The muscles in her arms were still there, but they were now padded with a soft layer of flesh. She looked at herself and felt a profound sense of loss. Who was this person? This wasn't Kim Possible.
The situation spiraled. The cravings became a full-time obsession. She found herself waking up in the middle of the night, driven by a gnawing hunger that felt like a physical ache. She would sneak into the kitchen, a phantom in the dark, and consume whatever she could find—cookies, cereal, ice cream. She started hiding junk food under her bed, a secret, shameful stash that she would eat when no one was looking.
Her parents, her brother, Wade, and even Ron began to notice.
“Honey, are you sure you’re feeling okay?” her dad asked one morning, watching her pile a mountain of bacon onto her plate. “You’ve been eating a lot lately.”
“I’m fine, Dad!” she snapped, the words coming out sharper than she intended. She was embarrassed, and she didn’t know how to explain the hunger that felt like a physical demon inside her.
At school, Ron tried to talk to her. “K.P., you’ve been… different. You haven’t been on any missions, and you kind of look like a different person. A… a bigger different person. But still pretty.”
Kim’s face flushed. The truth of Ron’s clumsy observation hit her like a punch to the gut. She had gained a significant amount of weight. She was no longer the svelte, acrobatic hero everyone knew. She was… heavy. Her new mission uniform, a size up from her old one, was already starting to feel tight.
“Just leave me alone, Ron,” she said, turning and walking away. She felt a tear well up in her eye, a single drop of self-pity and frustration. She was losing control, and she couldn't stop it. The more she ate, the bigger she got. The bigger she got, the less effective she was as a hero. The less effective she was, the more she ate to fill the emptiness. It was a vicious, self-destructive cycle.
She had to get new clothes. Shopping for them was a new kind of hell. The cute, trendy outfits she used to wear no longer fit. She had to venture into a section of the store she had never even looked at before, a section for plus-sized clothing. She bought a pair of baggy jeans and a loose-fitting hoodie, clothes that hid her new shape, clothes that were a far cry from her form-fitting mission uniforms.
Her confidence was in the toilet. She was no longer a symbol of heroic perfection. She was just… Kim. A girl who was struggling. A girl who had let herself go. She stopped answering Wade’s calls, stopped hanging out with Ron, and spent her time alone, wrapped in a blanket, eating her feelings.
Wade, ever the watchful eye in the sky, was worried. Kim hadn't answered his calls in days, and her missions log was empty. He looked at the last mission she had attempted—the rare-book thief. The video footage showed a Kim who was uncharacteristically slow and clumsy. He re-watched the footage, frame by frame, looking for a clue.
He noticed it then. The flying burrito drone. It was an anomaly. He cross-referenced the drone’s design with known villainous tech. It was amateurish, but the energy signature… the energy signature was what caught his eye. It was a unique, pulsing frequency. He traced it back to a device Dr. Drakken had been working on.
Wade’s analytical mind put the pieces together. The drone, the energy signature, the strange glowing of the Naco, Kim’s sudden, inexplicable weight gain, her loss of confidence… it all pointed to one thing. Drakken had created a bio-accelerator ray that had altered Kim’s metabolism, forcing her body to convert all food into fat at an accelerated, uncontrollable rate.
He knew he had to act fast. He needed to find a counter-agent. He pulled up a complex simulation of the bio-accelerator’s effects. He saw a way to reverse the process, a specific frequency of energy that could reset her metabolism to its normal state. But he needed a sample of the original ray’s energy and a way to deliver the counter-agent to Kim. He knew where the ray was—Drakken’s volcano lair.
He called Kim, but her phone was off. He called Ron. “Ron, I need you to find Kim. It’s an emergency. Drakken has a new scheme, and he’s using a bio-accelerator ray on Kim. She’s in trouble.”
Ron, who had been worried sick about Kim, immediately went to her house. He found her in her room, sprawled on her bed, a half-eaten bag of chips beside her. The curtains were drawn, and the room was a mess.
“K.P.,” Ron said softly, his heart aching at the sight of her. “Wade called. He says Drakken hit you with some kind of ray.”
Kim didn’t move. Her voice was muffled. “It doesn’t matter. I can’t do anything. I’m useless. I can’t fight. I can’t even fit into my clothes.”
Ron sat down on the edge of the bed. “Kim, you’re not useless. You’re Kim Possible. You’re the smartest, toughest, most amazing person I know. And yeah, you look a little… different. But that doesn’t change who you are. The real Kim Possible isn't a size or a body type. It’s the girl who faces down evil every day with a smile. It’s the girl who’s always there for her friends. It’s the girl who… who’s sitting on this bed feeling bad about herself, and I know she’s still a hero, deep down.”
Kim finally sat up, tears streaming down her face. She looked at Ron, really looked at him, and for the first time in a week, she saw a genuine, unconditional love in his eyes.
“But… I can’t do my mission moves anymore,” she whispered, the words choked with emotion. “I’m too slow. I’m too heavy. I’m not… I’m not me.”
“You’re still you, K.P.,” Ron insisted, his voice gentle but firm. “You just have a little more… of you to love. And we can do this. Wade said there’s a counter-agent. We just need to get it from Drakken. We can fight this together, just like we always do. You’re the brains, and I’m… well, I’m the Ron. And a team with a smart brain and a Ron is a team that can’t be beaten. Right?”
A small, genuine smile finally broke through Kim’s tears. Ron’s words, clumsy and heartfelt, had done more to heal her than a hundred mission victories. She was still a hero. She just had to find a new way to be one.
The climax of Drakken’s plan was a terrifying sight. A massive, mutant vine, grown from a single garden pea, was now coiling its way around Middleton, its thorny tendrils crushing cars and tearing up the streets. Drakken, standing atop a control tower in his lair, cackled with glee.
“Behold, Shego!” he yelled, watching the destruction on a giant screen. “My verdant tendrils of terror! Soon, Middleton will be a veritable jungle, and its pathetic inhabitants will have no choice but to bow down to their glorious new overlord!”
Just then, a voice came over his comms. “Drakken, this is Kim Possible. Your little jungle gym is about to be cleared out.”
Shego smirked. “Oh, she’s here. I’ll go warm her up. She probably needs it, looking a little… out of shape.”
Kim, in a new, larger, custom-made mission suit that Wade had designed and delivered, landed on a rooftop. The suit, made of a more flexible material, was still tight, but it moved with her, a testament to her new, larger form. She felt a surge of confidence, a new kind of power. She may have been slower, but she wasn’t weak. She was a different kind of strong.
Ron landed beside her. “You ready, K.P.?”
“Ready, Ron,” she said, a determined glint in her eye.
Shego, with a glowing, malicious grin, dropped from the sky, landing in front of them. “Well, well, well. Looks like the little hero has put on a few pounds. Going for the ‘large and in charge’ look, are we?”
Kim ignored the taunt. She knew Shego was just trying to get under her skin. She had to fight smart, not with brute force. She couldn’t do her usual flips and spins, but she could use her new weight to her advantage.
Shego charged, a flurry of green plasma. Kim dodged, but it was a clumsy, lumbering move. Shego laughed, but Kim wasn't done. She used her new mass to her advantage, planting her feet firmly on the ground, and delivering a massive, powerful punch that, while slow, had an incredible amount of force behind it. Shego blocked it with a grunt, the impact sending a shockwave through her arms.
“Whoa, okay, I get it, you’re heavy,” Shego said, shaking her hands out.
Ron, meanwhile, was doing his best to create a diversion. He was running around, making goofy noises, and generally being an unpredictable nuisance. Shego, annoyed, tried to swat him away, but his random, erratic movements made him hard to hit.
“Oh, for the love of… get out of my way, you buffoon!” she yelled, firing a plasma blast at him.
Ron, by pure luck, tripped over his own feet, and the blast sailed harmlessly over his head.
While Shego was distracted, Kim, using her bulk as a battering ram, charged forward, tackling Shego with a surprising burst of speed. The two of them crashed through a skylight and into the top floor of Drakken’s lair.
Drakken, seeing Kim, shrieked. “What? No! My bio-accelerator was supposed to make you weak, not… not a human battering ram!”
Kim, breathing heavily, struggled to her feet. She saw the counter-agent, a glowing green canister, sitting on a table next to the bio-accelerator. Drakken was about to grab it.
“Not today, Drakken!” she said, her voice filled with a new-found resolve. She couldn’t do a backflip, but she could waddle with surprising speed. She lunged forward, her mass a tidal wave of momentum, and knocked Drakken clean off his feet. The canister with the counter-agent flew into the air.
Just as it was about to fall into a vat of bubbling, green goo, Ron, who had managed to get inside, did a perfect, mid-air, taco-grabbing dive, and snatched it out of the air.
“Got it, K.P.!” he yelled, landing on his feet with an almost-acrobatic grace that surprised even him.
Kim grabbed the canister. She looked at Drakken, who was now pinned under a pile of machinery. “Looks like your plan backfired, Drakken. A bigger Kim Possible is a… a bigger problem.”
She pulled out a syringe and, without hesitation, injected the counter-agent into her arm.
The reversal was instantaneous. A warm, tingling sensation spread through her body. The tightness in her uniform, which she had grown used to, suddenly became loose. Her skin, which had felt bloated and stretched, now felt firm and toned. She felt a rush of energy, a lightness that was breathtaking. She looked down at herself, and her heart soared. She was back. She was Kim Possible.
Shego, who had just recovered from the tackle, saw the transformation. “Oh, great. The skinny hero’s back. This is so much less fun.”
Kim, with her old agility and speed returned, was a blur. She dodged Shego’s plasma blasts, did a perfect aerial cartwheel, and landed a precise, powerful kick to Shego’s chin. Shego, stunned, was sent flying into a wall of circuitry, which immediately shorted out.
“Later, Shego,” Kim said with a smirk.
With Shego defeated and Drakken pinned, Kim and Ron made their way to the main computer. Kim, with her newfound agility, was able to climb the massive, mutated vine, and with Wade’s remote assistance, was able to disable the bio-accelerator’s main power source. The vine immediately began to wilt and shrink, its thorny tendrils retracting as if on fast-forward.
The city was saved.
Back at Bueno Nacho, Kim and Ron sat in their usual booth. Kim was back in her normal mission uniform, which now fit perfectly. She held a healthy smoothie, a concoction of kale and berries, in her hands.
“So, you’re feeling better?” Ron asked, a burrito in his hand.
“Much better, Ron,” Kim said, taking a sip of her smoothie. “That week was… an experience. I learned a lot. About myself. About what’s really important.”
Ron nodded, his mouth full. He held out the burrito. “Want a bite?”
Kim just smiled and gently pushed his hand away. “I think I’ll stick with the smoothie for a while, Ron. I have a new appreciation for what my body can do, and I’m going to treat it with the respect it deserves.”
The last shot of the episode was Kim, a renewed sense of confidence in her eyes, looking out at the world. She had faced her greatest enemy—her own insecurities—and had come out on top. She was still a hero, but she was a hero with a new perspective, a hero who knew that her power didn’t come from the size of her body, but from the size of her heart.