Attack of the 50 Foot Sister

by sthompson1

After Lynn discovers Lincoln is slightly taller than her, the Loud siblings start to make fun of her for it. Fed up, she swipes one of Lisa's experiments to make herself taller, and turns into a 50 foot giant that's destroying Royal Woods! Will her siblings stop her, or is Royal Woods doomed? Originally a chapter in my genderbent story, "Linka's Loud House"! One-shot!

Hello, everyone! This story was originally a chapter in my Genderbent Loud House story, "Linka's Loud House", which was originally suggested by a fan and inspired by the "Attack of the 50 Foot Sister" idea that's been floating around the fanbase. So, here's a version with the regular Loud siblings, because I just couldn't keep it to that one story! I hope you all enjoy!

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In the Loud House, the Loud siblings were gathered in Lisa and Lily's room, all lined up for something. In the line, Lori, Leni, Luna, and Luan were already standing behind Lisa, with Lincoln, Lucy, Lana, Lola, and even Lily waiting in line. Lisa was measuring Lynn and jotting down notes on a clipboard.

Lincoln tells the viewer, "You might be wondering what's going on here." He explains, "Every 6 months, Lisa makes us do this thing where we measure our heights to make sure we're progressing properly."

Lynn whines, "This is ridiculous! Couldn't we just put our heights on a door frame like a normal family?"

Lisa sarcastically responded, "Oh, sure, Lynn! And while we're at it, let's use stones to measure our weight and use leeches to suck venom out of our snake bites." She looks over her notes and says, "Well, Lynn, you seem to be progressing quite nicely. You are currently at the average height of 4'9. Congratulations."

Lynn walks away, and Lincoln walks up, "My turn, then?"

Lisa does the typical measurements and after writing some stuff down she tells her big sister, "Excellent progression, sixth-eldest-sibling! You measure at 5'1!"

Lincoln smiled, "5'1, huh? Not bad!"

Leni cheerfully said, "Wow, Lincoln! You're taller than Lynn!"

Lynn gasped, "WHAT!?"

Lori realized, "Hey, yeah! Leni's right!" Lori frowns, "Wow. I literally never thought I'd say that!" She turns to Lynn, "How do you like that, Lynn? Lincoln's taller than you!"

Lynn protested, "Whoa, whoa, whoa! That can't be right!"

Lisa nods, "I'm afraid it is, Lynn. My records show that Lincoln is 4 inches taller than you are."

Lynn glared, "Check it again! Maybe you made a mistake!"

Lisa adjusted her glasses, "I don't make mistakes, Lynn."

"But you said I was at average height!"

"Precisely. You measure at 4 foot, 9 inches, which is the base average height for a 13-year-old girl. Where as Lincoln is at 5 foot, 1 inch, the apex height for an 11-year-old boy."

Lincoln told his big sister, "Calm down, Lynn. It's not a big deal."

Lynn snapped, "Big deal?! What is that, a small joke?!"

Lincoln shook his head, "No! That's not what I…"

Lynn interrupted, "There's no way that can be right! I'm the big sister!"

Lola joked, "Could've fooled me!" Lola and the girls all laughed at this, which only made Lynn more made.

Luan joked, "Aw, don't look so low, Lynn! Just be the bigger man… who happens to be a short girl! Hahahahaha! Get it?"

Of course, this made the girls all laugh even louder than before.

Lincoln snapped, "Stop it, you guys!" Lincoln told his sister, "So you're shorter than me, Lynn. Who cares? You're still my big sister." He seems to be holding back a snicker, "Then again… you're only a," He brings his index finger and thumb close together, "Little older than me!"

This joke made him bust out laughter, making everyone laugh uproariously, some of them even rolling on the floor.

Lynn grits her teeth, "Lincoln…"

Lincoln said through his laughter, "I'm sorry, Lynn!" He wipes tears from his eyes, "I couldn't resist!"

Lynn's siblings kept on laughing at her. So, in response, she punches Lincoln hard in the arm, making him shout, "OW!"

After that, everyone stopped laughing and Lynn marched out the room.

Later on, Lynn was shown kicking some soccer balls into her net. She was clearly kicking out of anger, "I'm not short!" She kicks one ball, "Lisa said I'm average height!" She kicks another, "So what if Lincoln's got a few inches on me?" She kicks one more, "It's just so ridiculous! I mean, girls are supposed to mature faster than boys!"

Lori shows up, a golf club in hand, "Hey, Lynn!"

Lynn sighs, "What is it?"

Lori shrugged, "I know we made fun of you back there, but I was wondering if you could help me with my golfing?"

Lynn shrugs, "Eh, sure." She takes the golf club, "What do you need help with?"

Lori chuckles a bit, "Oh, nothing. I just figured you'd be able to help me with my… short game!"

Lori begins to laugh like a maniac, which angers Lynn. She tries to hit her big sister, but Lori steps backward to avoid being hit, "Whoops! Looks like you came up a little short, little sister!"

Lori keeps laughing, which makes Lynn growl and bend the gold club over her knee. She tosses it to the ground and stomps back inside.

Up in her room, she throws a tennis ball against the wall, catching it each time it came back.

Lucy shows up, "Hey, Lynn."

Lynn screams, "AAH!" The ball was thrown and ricochets back, hitting Lynn in the head. Lynn rubs her head, "OW!" She asks, "What do you want, Lucy?"

Lucy pulls out a sheet of paper, "I just want you to know that thanks to your pain, I was inspired to venture into new venues of writing. I'm currently working on a… short story."

Lucy gives a deadpan laugh, Lynn shouts, "Oh, that's it!" She dives for Lucy, getting on top of the goth girl. The viewer doesn't see her get tackled to the ground, but Lynn's head pops up, "What the?" The scene zooms out to see that Lucy had disappeared! Lynn looked confused and asked, "How does she do that?"

In the park, Luan and Lynn were shown walking together, both holding an Ice Cream cone. Lynn said, "Thanks again for the ice cream, Luan."

Luan shrugged, "No prob, little sis! I know everyone's jokes have made you feel a bit low lately. Hahahahaha!" Lynn frowned and Luan then said, "But seriously, I know they've been bothering you."

Lynn sighed, "It's OK. At least I have one sister who isn't riding me."

Luan nods, "You're welcome!" She asked, "Wanna hit up the batting cages?"

Lynn answered, "But I don't have any money."

"Don't worry about it. I can spot you, since you're… short!"

Luan started laughing like crazy, which made Lynn glare and ask, "You did all of this just to make a joke?!"

Luan was holding her gut, "Totally worth it!" As she laughed on, Lynn threw her cone, the ice cream sticking to the comedienne's head. As Lynn marched off, Lua joked, "I guess this ice cream is on me! Hahahahaha! Get it?"

In her room, Lynn was busy hitting her punching bag in anger. As she huffs and puffs, she hears a knock on the door. She asks, "What?"

Lincoln walks in, "Lynn. Are you OK?"

Lynn crosses her arms, "No, I'm not!" She approaches her brother, "Everyone keeps making fun of me, and it's all your fault!" She points a gloved finger at her brother.

"Me?!" Lincoln asks in an offended tone, "What did I do?"

"Ever since the measuring, everyone keeps mocking me for being short! The twins said they're combined height makes them taller than me, Luna asked me to help her practice her low keys… and then said she "didn't want no short people round here" as I left… and Leni of all people tried to make fun of me, but all she said was that I was short!"

Lincoln told her, "Lynn, I'm sorry you feel like that, but it's not a big deal."

Lynn replied, "Oh, ha ha! First time I heard that one."

"Lynn, I'm serious." Lincoln explained, "We're still young. We're works in progress. Someday, you might actually be taller than me. Who knows? Besides, being short isn't all bad. In fact, some people actually don't like be so tall."

Lynn smiled, "Hey! That gives me an idea!" She rubs her gloved hand under her chin, contemplating, "Maybe they're just making fun of me being they don't like being tall!" She rubs her hands in an evil manner, "So, I'll just give them a taste of their own medicine!"

Lincoln was worried about this and said, "Lynn, that's not what I…"

Lynn rushed off, "Thanks a lot, Stinkoln!"

Lincoln tells the viewer, "This won't end well."

In Lori's room, Lynn says, "Hey, Lori!"

Lori, who was on her phone, covers the receiving end and asks, "What do you want, shorty?"

Lynn told Lori, "You know something, sis. You might have looked ugly when you were younger, but you sure have changed." She grins, "I bet the guys think you're quite a tall drink of water."

As Lynn laughs, Lori smugly replies, "They sure do!" She looks away from Lynn, removing her hand from the receiving end and saying, "Weirdo." Lynn frowns, and Lori says into the phone, "No, not you, Boo Boo Bear."

Downstairs, Luan walks in from outside and Lynn asks, "Hey, Luan! I just saw you come in from outside. How's the weather up there?"

Lynn laughs and Luan replies, "Partly cloudy, 20% chance of rain." She asks, "How's the weather down there?" Luan rushes off, laughing, and leaves Lynn to frown.

In the kitchen, Lynn was getting a pudding when Luna approached her and said, "Hey, little sis!" She snickers, but Lynn only grinned at this, "Hook me up with one of those pudding cups?"

Lynn put her hand to her ear and asked, "What?! You'll have to speak up! I can't hear you from up there!"

Lynn laughed, but Luna simply replied, "Huh?! What?! Speak up, dude! I can't hear you from down there!"

As she laughed, Lynn looked to the viewer and said, "Yeah, I walked right into that one."

In Lisa's room, Lynn was on her hands and feet begging, "Please, please, please, please, PLEASE!"

Lisa was messing with some chemicals and responded, "Forget it, Lynn! I'm not going to increase your size! I may have done unethical experiments on all of you before, but I am not going to purposely tamper with your biological progression. You'll just have to wait and see if you grow taller than our brother."

Lynn glared, "I don't want to "wait and see"! I want to "grow and show"!"

Lisa turned to Lynn and said, "I'm sorry, Lynn, but the answer is "no"!" Lisa pours the chemicals she had mixed together into a beaker. She pulls out a teat pipette and sucks some of the mixture into it, "Now, if you'll excuse me," She pulls out an apple and places it on the table, "I'm about to end world hunger! With a single drop of this serum, I will be able to turn this one apple, into two!" She drops a bit of the serum onto the apple, but instead of the desired effect, the apple actually doubled in size! "Or make it grow."

Lynn cocked a brow, "Wait. Are you telling me that little drop made the apple grow!?"

Lisa sarcastically responded, "No, Lynn. I merely said that for my own amusement."

Lynn grinned, cupping her chin in her hand and saying, "Hey! If one little drop did that to an apple…"

Lisa notices the look in her sister's eye and shakes her head, "Oh, no you don't!" She hides the beaker behind her back and holds up her free hand to halt Lynn, "I know what you're thinking, missy! You are not getting your hands on…"

Lisa was cut off by Lynn picking her up by the back of his shirt. Lynn swipes the beaker and says, "I may be short, but I'm still bigger than you!"

Lynn drops Lisa and starts chugging down the serum! Lisa stands up and says, "Lynn! STOP!" Lynn finishes the concoction and gave a loud burp. Lisa stood there in shock and said, "Oh." She says in an Italian accent, "That's-a no good."

Lynn groans, dropping the beaker. As it shatters, she grabs her stomach, "Oooooooh! I don't feel so…" She gags and then thrashes on the floor, groaning and yelling in pain. As she gets on all fours, she gives one more pained yell and suddenly, releases a huge fart!

Lisa got the fart right to her face, leaving her face frozen in disgust.

Lynn stood up and wiped the sweat from her brow, "Phew! That's a relief." She closes her eyes and prattles on, oblivious that she was slowly growing, "For a second there, I was afraid something bad was going to happen!" She opens her eyes and says, "Hey! Did the room get smaller?"

Lisa snapped out of it and said, "Lynn… the room isn't getting smaller." She yells, "YOU'RE GETTING BIGGER!"

Lynn feels her head hit the ceiling, "OW! What the…" She was suddenly as big as the room, and getting bigger by the second!

Lily, who was in her crib, sees this and asks, "Boo boo?"

Lisa quickly grabs Lily and rushes out of her room, yelling, "EVERYONE! GET OUT OF THE HOUSE!"

Everyone rushes out as Lisa screams and start complaining about the noise. Lincoln ask, "Get out? Why?"

Suddenly, Lynn's giant hand pops out of the room, saying, "Lisa!? Where are you?!"

Lisa points and screams, "THAT'S WHY!"

Everyone quickly ran out of the house, and within a matter of seconds, the house fell to pieces as Lynn grew even more! She kept on growing, and growing, and growing, until finally, she was about 50 feet tall!

Lisa says, "Oh, sweet heavenly Einstein."

Everyone got a good look at Lynn, with Leni even fainting.

Lincoln shouted, "LYNN! What happened to you?!"

Lori points out, "The house is literally in pieces! Mom and Dad are going to freak!"

Luan joked, "I think we have a bigger problem on our hands. Hahahahaha! But seriously, this is bad!"

Lincoln glared, "Lisa! Is this because of one of your experiments?"

Lisa defended, "No. This is because Lynn stole and drank one of my experiments!"

Lynn looks all over the place, "Whoa! This is awesome!" She points in the distance, "I can see Pop Pop's retirement home from here!"

Lori yelled, "Lynn! Don't worry! We're going to get you back to normal!"

Lynn glared at her siblings, "Why? Just so you guys can make me short again and keep on making fun of me?! No, thanks!"

Lincoln shouted, "Lynn, this is serious! Can't you see what a big deal this is?!"

Lynn asked, "Oh, now you're gonna make fun of me for being tall?!"

Her siblings stayed silent, and then Lola said, "You have serious anger issues."

Lynn said, "Hi, Kettle. I'm Pot." She picks up her foot, "And here's my good friend, Mrs. Foot!"

Lynn brings down her foot, making her sibling scream and scramble. Lori quickly pulls the unconscious Leni with them, moving her out of the way of Lynn's massive foot! She stomps her way onward, going straight for the city!

The Loud kids banded back together and Leni wakes up, rubbing her head, "What happened?"

Luna answered, "Lynn's turned into an Empire State Human!"

Lori added, "And that Empire State Human is literally heading into town!"

Lincoln says, "We've got to stop her!"

Before he could rush off, Lisa grabs hold of his shirt, making Lincoln stop, "Are you insane?! We can't stop her like this!"

Lincoln turns around and asks, "Well, what are we suppose to do? Just sit and do nothing?!"

"Nope." Lisa said, "I have an idea."

In town, Lincoln's friends were all walking out of the theater. Clyde scoffed, "That movie was so cheesy!"

Rusty said, "You said it, brother!"

Liam asked, "A 50 Foot person? Who's the bozo who came up with that idea?"

Zach added, "Giant people. Ha! The very idea is…" He stops and gasps.

The other boys look where he was looking and gasp as well. They see Giant Lynn stomping towards them.

Rusty says, "Holy moley! We're eating crow!"

Clyde adds, "And the taste is quite bitter, my friends."

The boys scream and run away from the giant. She starts rampaging through town. People run away in fear of her, and she smashes buildings and crushes businesses, like Gus's Games and Grub, Flips Food and Fuel, even the Aloha Comrade! Out of the wreckage of the last one, Lynn Sr. and Sergei pop out.

Sergei tells Lynn Sr., "She's your daughter. You will pay for the damages."

Lynn Sr. frowns, "Dang it!"

Lynn arrives at each of the schools, crushing Royal Woods Elementary, then Royal Woods Middle, and then Royal Woods High! Course, all of the schools had groups of students cheering about this, until she started trying to stomp on the students!

In town, Katherine Mulligan was reporting the chaos, "This is Katherine Mulligan, reporting live! A giant, adolescent girl is destroying downtown Royal Woods! All residents are advised to…" Before she could finish, Lynn stomps on Katherine and her crew. As she stomps away, Katherine emerges from the shoeprint, saying in pain, "This is Katherine Mulligan, saying… medic!" She passes out back in the footprint.

Back at the house, Lisa was busy mixing formulas and pouring them into 10 separate beakers.

Lori yelled, "Hurry it up, Lisa!"

Lisa snapped, "Hold your horses! I am making 10 of these, you know!" As she fills up the last beaker, she says, "Alright! If my calculations are correct, this should be enough to increase us to the same size as Lynn."

Lincoln asked, "Wouldn't it be easier to make a mixture that'll change her back?"

Lisa explained, "Exactly, which is why I have the formula for such a thing, but Lynn won't take it willingly. We'll have to stop her ourselves and make enough of it to revert all of us back to normal, making sure she drinks it."

The Loud's take their respective beaker and Lincoln says, "Well… bottoms up."

They all begin to drink the concoction, with Lily drinking hers like a bottle.

Back in the town, Lynn continues to cause destruction and chaos, shouting, "You all laughed at me! Well, who's laughing now?! Hahahahahahahahaha!" After her crazed laugh, she looks down and says, "Hey!" She reaches down and picks someone up. It was her crush, Francisco, who was screaming his head off. Lynn flirts, "Hey, Fran. How's it going?"

Francisco screams bloody murder, trying to break free of the giant jock's grip.

Suddenly, a familiar male voice shouted, "Drop the boy, Lynn!"

Lynn looks back, "Huh?"

Behind her were her siblings, who were all now the same height as him! Lily glares and points to Lynn, "Boo Boo!"

Lynn puts Francisco down on top of a building and glares at her siblings, "So, couldn't take the fact I was the bigger sister now, eh?!"

Lori told her, "Lynn, stop this! You're literally acting like a monster!"

Lincoln explained, "Lisa's got a formula that'll changed you back to normal!"

Lisa cracks her knuckles, "It's time to take your medicine, sister!"

Lynn grins and stares down her siblings. She rushes towards them, roaring like a kaiju, and her siblings also rush towards her!

A giant fight begins between the Loud kids and Lynn. Punches and kicks thrown, people thrown onto buildings, thereby crushing them, and people below scrambling to escape the monstrous kids! Suddenly, many military tanks and planes appear on the scene and start firing at them.

Lynn covers her face, "OW!" She looks down and says, "Cut it out! We're fighting!" She stomps one of the tanks, causing the soldiers nearby and inside to run for dear life.

The planes also started shooting, with Luna tell them, "Dudes, stop it! We're on your side!"

They all begin to swat down the planes like flies. Once they were dealt with, the fight begins again. After a few more punches are thrown, Lynn inhales deeply, and shots an atomic beam out of her mouth!

Everyone dodges the blast and Lisa says, "Huh. Note to self: Side effects of serum include atomic breath."

Finally, Lynn was stopped by a diaper being thrown over her eyes, blinding her! She screams, "AAAHH!" She walks around blindly, "I can't see; and it smells terrible!"

Lily was shown, a building hiding her shame. She points and smugly glares, "Poo Poo."

Not knowing where she was walking, Lynn walks backwards, with Luan getting on all fours behind her. This causes Lynn to fall backwards and fall to the ground! A huge tremor is caused as a result of her impact with the ground.

The Loud kids all surround her and Lori gets on top of her, holding her arms to the side, "It's over, Lynn! We're turning you back to normal!"

Lynn tries to break free, but is unable to, "No way! I don't want to go back to being short! I can't live with the insults!"

Lincoln glared, "Lynn, enough! So we insulted you for your height. It's what siblings do!"

Lynn shook her head, "Not that! I meant the insults from everyone else!"

The Loud's ask, "Huh?"

Lynn confessed, "Ever since you guys found out I was short, it somehow got around town. Now all the kids at school and everyone in town has been making fun of me!"

Lana asked, "How did everyone figure that out?"

Lola suddenly gulped and back up slowly, hoping no one would see her backing up.

Lynn said, "It wasn't enough my own family was making fun of me, but now everyone is."

Leni tells Lynn, "That doesn't make it right to grow giant and destroy the town, though."

Lynn sighs, "You're right. I'm sorry, guys."

Lincoln tells her, "We're sorry too, Lynn. I mean, sure, maybe I'm a little taller than you, but we're still growing. In a few years, you probably will be taller than me."

Lori adds, "And we promise to stop making fun of you for being short."

Lola reappears and balls up her fist, "And beat up anyone who does!"

Lynn smiled, "You guys really mean that?" Everyone nods and Lynn almost tears up, "Thanks, guys." She sniffles and Lori gets off of her. Lynn says, "So, what do you guys say we turn back to normal?"

Lisa told her, "Already on it!"

Sometime later, Lisa is shown using the water tower to mix the new formula. Once done she says, "That should do it!" Lisa holds the tower in her hand like a cup and hands it to Lynn, "You go first, sister."

Lynn takes a sip, gives a burp with a purple cloud from her mouth and smacks her lips, "Grape flavored!"

After her, everyone begins to drink from the tower, with Lily getting the last sip. In a puff of purple smoke, everyone looked as if they had returned to normal size!

Lincoln beamed, "Hey! It worked!"

Lynn pumped her fist, "Yes! We're back to normal!"

Leni points out, "Oh, no! Lily's still a giant!"

They see a giant Lily, who says, "Poo poo!" She then laughs.

Lincoln gasps, "She's not a giant." The scene shows the group was smaller than a crushed soda can beside them, "We're all teeny tiny!"

Lisa sheepishly chuckled, "My mistake."

Lily toddles forward, her steps shaking the Loud's and throwing them to the ground. As Lily's foot hovers over them, Lynn says, "I don't know if this is ironic, fitting, or both." As the foot prepares to stomp them, the Loud's all huddle together and scream before being crushed!

Suddenly, Lynn wakes up on the couch, screaming her head off. "Huh?" She looks around and sees a boatload of meatball sub wrappers around her.

The TV announces, "We now return to the 24-Hour B-Movie Marathon, already in progress! Attack of the 50 Foot…"

Lynn frowns and turns the TV off. She wipes the sweat from her brow and says, "Phew! I've gotta lay off the meatball subs."

Lincoln shows up and asks, "Are you OK, Lynn? I heard you scream."

"I'm fine, bro." She laughs, "I had this dream you were actually taller than me and everyone was making fun of me for it, so I drank some science crud Lisa made so I could turn giant and…" She sighs, "Thank goodness it was all a dream!"

Lincoln told her, "Actually, the first part wasn't a dream." This made Lynn go wide-eyed, "I am taller than you."

An exterior shot of the Loud House is shown, and Lynn screams, "NOOOOOOOOOOOOOOOOOOOOOOOO!"

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A big thanks to 1 for the story idea, and to him (or her) and DiamondDollDark for helping me decided on the ending! I know the "it was all a dream" cliché has been done to death, but I hope the twist I put on it was to everyone's liking!