AN: I know I say this a lot. But this time I was genuinely, truly intending to just leave this thing as a one-shot. That's why I didn't even try to establish any kind of actual story, it was just supposed to be a bit of self-indulgent goofery.

Buuuut I was invited to check out Giganticluv's Lynnzilla story, which as the name implies is related to the whole Luna Kong thing, and parts of that story struck enough of a chord with me that I started wondering about how I might combine the two. And then 4k words and some change later I'm now writing this sentence. Period.

So uh, apologies for my lack of restraint Giganticluv.

blacksteel387: Well, I had to give credit where credit is due. But since you're enjoying my story, we'll call it even.

Jeff: I told you that Luck is his highest stat. For better and worse.

"I'll be back soon. Until then, keep Lincoln safe!"

Those were the words Luna had spoken to her girlfriend before she'd charged out of their camp and into the night.

In their time on the island, Luna had developed a sort of...sense, for danger. She still wasn't sure if it was yet another quirk of her transformation or some sort of evolutionary response to living in an environment where impossibly large and powerful creatures lurked around every corner. But whatever it was, it had enabled her to keep her little family safe, and for that, she was grateful.

This was why, when it had suddenly come upon her as she was preparing to settle down for the night, the usual tingle in the back of her head having been replaced by a full-blown migraine, her every instinct screaming "DANGER" at the top of their figurative lungs, she hadn't hesitated before rushing out to meet it.

On she went, her powerful legs propelling her along at incredible speeds, heedlessly stampeding her way through the undergrowth, until finally she emerged from the all-encompassing jungle and skidded to a stop as she took in the change in environs.

It was the beach. Not the beach, of course, they were on an island and an island by necessity was made up of many parts that were beach. But this was the one closest to their camp, which they used for fishing, scavenging, and a group activity that Sam referred to as "slippery fun time". And the mere fact that she could feel so...unnerved in a place that now held so many good memories for her only heightened the anxiety she was feeling. Nevertheless, Luna squared her shoulder clenched her fists, and meticulously cast her gaze around the area, determined not to be caught off guard by whatever it was that was forthcoming.

She didn't have to wait for long.

The sea began to churn, the water frothing furiously as something pushed through, making its way toward land. Luna's hackles rose as it began to emerge, its form obscured by the night, but its shape unnervingly recognizable.

It was big. Not compared to the toughest beasts Luna had to contend with on a regular basis, but by her estimation, easily comparable to her own height, and the tremors it caused as it emerged from the surf and took its first steps on land spoke a power that considerably outweighed its relatively modern size. Her target in sight, Luna readied herself, preparing to pounce on the thing the instant it entered her attack range, fully intending to overwhelm it with all the power and ferocity at her command.

The thing trudged close, Luna's muscles coiling more and more tightly with each step, until finally, it was near enough. She tensed her legs, moments away from committing to her attack…

...until an errant shaft of moonlight gave her pause.

Mere instants away from finding itself on the wrong end of Luna's fists, the thing path caused it to step into a small, carelessly placed beam of light. And as it did so, the cloak of night faded away, and Luna saw the creature for what it truly was. And in that moment, she froze, her mouth falling agape as she took in the sight before her.

"You've got to be kidding me," The thing muttered, as it began wringing seawater out of its ponytail. "It would be the last island I checked!"

"Thunderstruck" would have been an apt descriptor for Luna's current state of being. She'd been prepared for what she was certain was going to be the fight of her life, and now...well, honestly she still wasn't entirely writing off that possibility, but the situation had dramatically shifted into a direction she couldn't possibly have predicted, and the sheer whiplash she was experiencing had left her numb and stupified.

Fortunately, that state didn't persist for long.

"L-LYNN!" Luna exclaimed, her eyes bugging out as she tried to process what she was seeing. Her "little sister" was now anything but, having somehow attained a size and physique that allowed them to stand as equals, even with Luna possessing her own impossible stature.

...And it was a minor thing, but Luna couldn't ignore the niggling thought that Lynn was somehow looking considerably better put together than Luna did at the moment. She had clothes. Not...especially fancy ones, or even nice ones, but that was par for the course for the family athlete. Lynn's wardrobe had always been about function over form, and at their size her options would likely have been extremely limited. Still, her attire, despite consisting solely of a tight white and red tank top and red shorts, gave the gargantuan girl a certain air of normalcy that Luna felt herself envying. She herself like the girls which featured in those comic books Lincoln used to hide from their parents when they were younger. Which certainly fit her current lifestyle, and definitely...enhanced certain activities she enjoyed getting up to with her partners. But compared to her younger sister, Luna couldn't help but feel a little...frumpy, by comparison.

She even had earrings! Lynn didn't wear earrings! And where the heck would she even get them?

"It's actually 'Lynnzilla'."

"Wha?" Luna replied as she was mercifully pulled back into the present.

"Lynnzilla", Her sister repeated, gesturing to a stylized "LZ" that had been monogrammed onto her tank top above her right breast. "That's what I'm going by now. It's kinda my brand."

"You have a brand?" Luna asked, her face scrunching up as she was still attempting to process this overflow of information.

"Wait," She sputtered, shaking her head furiously. "Forget about that. LYNN! WHAT HAPPENED TO YOU?"

"What happened to me?" Lynn retorted, stepping forward and jabbing one finger into Luna's shoulder. "What the hell happened to you? It's been almost a month since your boat went missing!"

Luna flinched as the more than properly placed anger struck her with more force than her sister ever could.

"...That long, huh?" Luna asked, wincing as her mind began working the numbers. "Yeah, time gets kind of weird when you're on a deserted island…"

"Come on moms! Pops!" Luna had pleaded with her parents. "Please? This is urge! This cruise gig could be HUGE for mine and Sam's careers!"

"I'm not disagreeing with that, Luna," said a very exasperated-looking Rita. "You know we always try to support you and Sam, especially when it comes to your music. And the two of you are both adults, so obviously we're not going to forbid you from taking this job. My problem is that you want to take your 17-year-old brother with you, and Lincoln's just...not quite there yet.

"But we need him!" Luna pleaded. "He's our manager!"

"Which is another thing I'm still not super onboard with…"

"He's really good at it!" Luna protested. "You've seen what he can do with that blue suit! Our clients never know what hit them!"

It also worked really well in other situations. There was a reason they got it dry-cleaned on almost a daily basis whenever Lincoln went on the road with them.

"I don't want any of my babies going on that death trap!" Lynn Sr. wailed, seemingly teleporting to Luna's side and snatching her into a bone-crushing hug before she could even register his presence. "What if something goes wrong? What if the boat sinks? What if you all end up trapped on a deserted island? AND NOT THE KIND WITH MY HOME MADE ICE CREAM!"

"...Huh," Said Luna, blinking in surprise as the memory released its hold on her. "Dad's worrying was...weirdly on point for once."

"...Well, mostly," She corrected herself, absentmindedly flexing one gargantuan, superhumanly muscled arm.

"Yeeeeah," Lynn added. "That was going to be my next question."

The pony-tailed girl gestured broadly at Luna's enhanced...everything. "Did a mad scientist turn you into a super-powerful monstrosity?"

Again Luna blinked in surprise. "That was a weirdly specific guess, but...yeah, basically."

"That's what happened to me too," said her sister as she enthusiastically thumped her own chest. "Course, my scientist was Lisa. So after the initial...uh, awkwardness, things ended up going pretty smoothly. I get the food I need, clothes to wear, a place to sleep with about as much privacy as I can expect…"

"We got picked up by a couple of...bad scientist types," Luna replied, wincing as a flurry of memories flashed across her vision. "I don't...really like to think about it…"

"...not to mention the multi-million dollar merchandising deal I snagged when I single-handedly saved Royal Woods from a rampaging kaiju—oh." Lynn's face fell as she processed Luna's words. "Damn, sis. I'm sorry to hear that."

She stepped forward and placed one hand on the older girl's shoulder, her tone turning menacing. "Don't suppose any of those morons are still around?"

"We took care of 'em," Luna said, tersely. "It's...over."

"Well...good," Lynn replied, removing her hand from Luna's shoulder and scratching the back of her head as an awkward silence began to settle between the two girls.

"S-so...how'd you find us?" Luna asked, eager to change the subject.

"Well, it took me a while to get settled into this whole new...thing of mine. And we were hoping that one of the rescue teams they kept sending out would find you guys, or maybe you'd just turn up on your own. But rescue services started getting really tight-lipped about what they were...or maybe weren't finding, and we were all going nuts worrying about you guys, so I finally decided to do something about it. Lisa got me the last known coordinates of the cruise ship, so I swam out here and kind of just...started looking. Hoped I'd get lucky."

"You swam here?" Luna asked, incredulously.

"Like a fish," Lynn replied, a broad grin blooming on her face as she flexed one arm demonstratively. "Kinda surprised you didn't try that to get home, seeing as you're also in the Big Gal Club."

"Never really occurred to me," Luna admitted, wincing. "But we've also been...kinda busy here."

"Okay?" Lynn said, her tone implying she was waiting for Luna to elaborate. Unfortunately for her, Luna had no intention of doing so.

"Well...alright," Lynn continued after several more awkward moments stretched out. "Anyway, the important thing is I'm here now. So...I guess go get your stuff, and we'll head out."

"Head...out?" Luna asked, slowly. "To where?"

"To...home," Lynn replied as if the answer was obvious. "I'm here to take you guys home."

Silence had fallen upon the beach, the only sounds that could be heard were the ambient noises of the jungle denizens, and that of the waves lapping against the sand.

"We're not going home, Lynn," Luna said at last, locking eyes with her sister. "Not...yet. Definitely not yet."

"Alllllriiiiight," Lynn drawled, crossing her arms under her breasts. "So...couple of Q's then, hoping you've got some A's. First, you've got Linc with you, right?"

"Of course!" Luna retorted, scowling. Incensed at the mere suggestion that she wouldn't have protected her little brother.

"'Kay. And by any chance, was he also mutated into a super awesome giant monster?"

"No?" Luna replied, blinking in confusion. "Just regular old...uh, Lynn?"

As she'd spoken Lynn had begun staring off into the distance, a glazed look upon her face.

"Oh, sorry," The ponytailed girl replied, giving her head a violent shake as her cheeks began to take on a scarlet tinge. "I was just...picturing what that might look like..."

"...Huh!" Luna murmured as her own mind began to wander…

"A-anyway!" The younger girl continued, letting out a small, embarrassed cough into her fist. "So it sounds like what you're telling me is that you want to stay here, with our totally normal, extra little, little bro. On this island, which, based on that thing you're wearing…"

She gestured towards the animal hides that Luna had fashioned into a makeshift outfit. "Is full of giant, probably scary things that, in a best-case scenario, would probably eat Lincoln if they caught him. Right?"

"Well...obviously it sounds bad if you put it like that!" Luna spat, glaring at her little sister, who had apparently picked today of all days to be frustratingly rational! "But it's not! Because obviously, I'd never let anything happen to him!"

Lynn stepped forward, now standing only inches away from Luna, and looked her straight in the eye. "Look, it sounds like you're...dealing with something here. And I get that, so I'm not going to force you to do anything since you can clearly take care of yourself. But I'm heading home and I'm taking Linc with me."

"No deal," Luna growled, feeling her lips begin to pull back into a snarl. To her surprise, the younger Loud let out a snort of amusement.

"Who said anything about a deal?" She said. "I'm not making a request here. I'm taking Lincoln home with me, and there's nothing you can do to stop—!"

It happened so quickly. Luna's vision went red for what felt like only an instant, but when the haze cleared, she found that her fist had been driven right into her sister's face.

And while the fact that she'd lost control of herself like that would have been alarming in any other situation, what really gave her cause for concern was that the strike had barely caused Lynn to move. Luna's fist, which had effortlessly shattered stone and metal in the past, and had easily caved in the skulls of those island creatures who'd refused to learn their place, was firmly planted in her sister's face. Her arm was still trembling, still aching from the impact. And all it had accomplished was causing Lynn to lean back a bit.

Retracting her fist, Luna watched warily as Lynn straightened up, and loudly cracked her neck.

"...So," Lynn said, her voice laced with menace. "Is that how we're doing things?"

"...It is," Luna said, as she settled into a combat stance.

Lynn chuckled and beckoned Luna with one hand.

"Bring it," She said.

Pain had been a vague memory for Luna for quite some time now. As far as she knew, she was the toughest, strongest thing around. Anything that challenged her, she destroyed, thoroughly and utterly, so it would never have a chance to threaten her or her loved ones ever again.

She gasped, as another body blow from Lynn caused her to double over, causing her to spit out every ounce of air in her lungs, and what looked a lot like blood.

Because Lynn was another matter entirely.

"Had enough?" her sister rasped, her fist still planted in Luna's abdomen. The younger girl wasn't exactly looking pretty herself. What she lacked in finesse, Luna made up for with the raw ferocity she'd developed from challenging the island's denizens, and the bruises and fat lap that now adorned Lynn's face were a testament to the kind of power that Luna could bring to bear.

But her sister, her insufferably thick-headed little sister, seemingly didn't know when to go down!

"Not...even...CLOSE!" Luna wheezed. Mustering her strength, she capitalized on her position and went low, wrapping her arms around Lynn's waist and hoisting the girl overhead with lightning speed. While Lynn was still sputtering, equal parts furious and outraged, Luna began to swing her around, shifting her grip so that she was swinging her little sister by her well-muscled legs. As she achieved the necessary velocity, Luna sent Lynn flying with a mighty heave, sending the girl crashing into the treeline, dozens of trees breaking her fall in the most violent way as she soared through the air, until finally gravity asserted its hold on her once more, and she slammed to the ground with an earth-shaking impact, and slowly skidded to a stop.

Hope was...such a rare thing. And Luna frantically nursed what little was blossoming within her as the moments stretched on. But all things eventually come to an end, and that hope died a violent death the instant Lynn began to stir.

"N-not...b-bad…" Lynn gasped as she staggered to her feet.

Frustrated beyond all rational thought, Luna succumbed to her savage impulses and roared, her anger echoing with all the force her lungs could muster. It was...instinct. Routine. A move that she commonly employed against her island peers, who could be scared into fleeing a fight after it had been made abundantly clear to them that they had no chance of winning. Not that Luna ever let them leave, it was just a lot easier to finish an opponent who was no longer fighting back. Regardless, had she been more in control of her faculties, it wasn't a move she would have tried against a truly intelligent opponent. Or...Lynn, even.

Still, she was surprised when Lynn drew herself up to her full height, and barked out a scornful laugh.

"Oh. Are we roaring here?" The younger Loud asked with her usual brand of smugness. "Let me show you how it's done!"

Clenching her fists, Lynn sucked in a deep lungful of air and unleashed a sonic assault so ferocious that had she been normal, Luna was certain it would have destroyed her eardrums. As a singer and music enthusiast, she was actually genuinely impressed by the pipes on her little sis.

That admiration lasted all of a few instants, as a sharp pain began building in Luna's chest, rapidly rising in intensity until the giant rocker was howling at the pain that wracked her body. Just as she felt like she could take it no longer, a massive explosion of force erupted, sending her flying.

The next thing Luna knew was pain, and more pain, every inch of her aching with agony. She was also fairly certain that she was flat on her back, a hypothesis that seemed significantly more likely as Lynn's freckled face suddenly came into view, looking down on her both figuratively and literally.

"What...the hell...was that…?" Luna rasped, her ears still ringing.

"Guess I forgot to mention," Lynn wheezed, her voice scratchy, and a triumphant smirk adorning her face. "I have Sonic Breath."

"So...cool…"

"Right?"

Luna coughed as Lynn reached down, wrapped her hand around her throat, and hoisted the elder Loud into the air.

"That was...actually kinda fun," Lynn rasped as she drew her other fist back. "But now it's time to say good ni—!"

"WHAT THE HELL IS GOING ON HERE?"

Luna's vision was swimming, partly from the supernatural strike she'd just eaten, but also from the many, many blows to the head she'd taken from Lynn over the course of their fight. Still, in the burgeoning daylight that was beginning to spread across the island, even in her condition she could readily recognize the sight of her girlfriend as she stepped out of the significantly reduced treeline, her blue animal hides and golden hair standing in stark contrast to the jungle greenery around her. It may have been the look of fury on her face tapping into something Luna hadn't yet realized about herself, or it may have been the multiple concussions she was likely suffering from, but in that instant, Sam Sharp looked even more radiant than she normally did.

"Woah," Lynn breathed, lowering Luna and bringing their faces close together. "Sam's in the club too?"

Before Luna had a chance to reply. Or...even check if she had the capacity to reply, Sam stormed towards them, her fists clenched so tight that her knuckles turned bone-white.

"Let go of my girlfriend you hussy!" She barked. "Or I'm gonna...wait, LYNN?"

"H-hey, Sam!" Lynn stammered, looking between the angry blonde, and the Luna that she still held in her grip. "This...isn't what it looks like?"

"S-sam!" Luna exclaimed as she shook herself free from Lynn's grip, shooting her sister a death glare before turning her attention fully onto the blonde. "What are you doing here?"

"The whole island could hear you guys!" Sam retorted. "And you'd been gone for hours! Obviously, I was going to quit sitting on my hands at some point and come help you out!"

"Which I'm happy about, babe," Luna replied, trying not to sound as panicked as she felt. "But the whole reason I had you stay behind was to protect! Lincoln! Where's my little bro, Sam!?"

"...Ooooooh," said Sam, her widening eyes doing nothing to assuage the terror Luna was feeling. Fortunately, she quickly dispelled those feelings as she frantically began waving her arms around.

"It's cool! Really!" Sam shouted. "I've got him!"

The two Loud girls shared a questioning glance.

"Uh, where exactly, hon?" Luna asked.

"Yeah," Lynn added, equally confused. "Haven't seen my little bro in a bit, but...not exactly...seeing him anywhere."

Sam's cheeks flushed crimson.

"W-well, I wasn't going to leave him behind...but I didn't know what we were going to run into...figured I'd need to keep my hands free. So I put him...here…"

Shooting embarrassed glances Lynn's way as she did so, Sam fiddled with her top, reached inside...and pulled out Lincoln. Red of face, perhaps terminally so, but otherwise fine, as far as she could tell. And with her fears finally addressed, Luna finally let out a sigh of relief.

"LINCOLN!"

Bellowing with an intensity that rivaled that of her sonic breath, Lynn leaped forward, snatched Lincoln out of Sam's hand...and brought him up to her gargantuan face.

"Lincoln!" She shouted again, furiously nuzzling her cheek against her little brother. "Holy shit! Lincoln! Oh man, I missed you so much!"

"L-Lynn!" Lincoln squawked under the relentless assault of affection hit big sister was raining down on him. "What the heck happened to—AWK!"

Whatever he was going to say was swallowed up as Lynn began peppering his tiny face with kisses.

"N-never again," She murmured, the kissing growing longer...and more sensual as things went on. "N-never lose you ever again! It's Lynncoln time! From now on it's always Lynncoln time!"

It was about this point that Luna's patience snapped, like one of the many trees their fight had destroyed.

"Let him go, Lynn!" She growled, striding forward and driving her fingers in between Lynn's, trying to snatch her little bro from her sister's grasp.

"N-no!" Lynn shouted, trying to yank him away.

"Yes!" Luna shouted, responding in kind.

"Guys!" Sam exclaimed, flailing her arms at the feuding siblings. "If you keep that up, Linc's gonna—!"

SNAP

All movement ceased, the Loud sisters freezing in place as a loud cracking noise pierced the air. As if by some unspoken agreement, the duo leaned their heads forward, peering into their hands.

There, clutched in their grip, was their brother, more pale than usual, and with his waist slightly tilted at an angle that Luna couldn't remember seeing it bend at before. But much more alarming was a white, whispy-looking blob that was hovering just above his opened mouth, connected to his body by a pale thread that ran down his throat. And which was looking extremely worn.

"...Oops," Lynn said, chuckling nervously. "H-hey Luna...what did Lucy say we do when this happens?"

Wordlessly, Luna reached out, and using her finger, gently pushed the blob back down Lincoln's throat. Several frantic moments later, color returned to his face, and he took a deep shuddering breath.

The sisters collectively let out a tremendous sigh of relief.

"Can't believe that still works," Luna muttered, shaking her head in disbelief.