Summary: The boys are at it again.

A/N: Happy April Fools' Day. The joke is that it's way past my bedtime, and I don't want to proofread.

Panicked screams echoed across the hollow caverns of Mt. Ebott, more specifically in the frosty, ice-laden region known as Snowdin. Footsteps rumbled throughout the buildings and trees as monsters trampled the freshly laid snow during their mad dash toward Waterfall's entrance.

Two figures ran not too far behind, slowly gaining on the group.

Both bore a striking resemblance to the laziest of town's local skeleton brothers: Sans, who, coincidentally, was nowhere to be found. The same held true for his brother.

Those that knew the comedian best (i.e., Grillby and his usual patrons) noticed many differences between the three. First being the glitched stutter the strange skeleton monsters had to their steps. Second, the differing sound of their voices. And third, apparel. Clothes Sans would not be caught dead or alive in- unless Papyrus begged him to wear them.

The bright azure-eyed one - the one ominously closing the distance between them the fastest - wore a mock Royal Guard uniform accented by slivery-blue highlights and the light blue bandana wrapped tightly around his neck.

As for the one several paces behind the other - the one the townspeople feared the most (if only because of his violent disposition) - he was adorned by an odd mix of lab/casual clothes: a stark white lab coat, black shorts, fuzzy pink slippers, and a tattered red scarf the fluttering in the wind while trailing after him.

The latter skeleton (Error) laughed maniacally and flung sharpened bone attacks at the town's fleeing residents, encouraging them to move faster. A crazed, joyful grin stretched across his jaws while the frantic monsters attempted to dodge.

Alas, the effort did very little for most.

His well-aimed projectiles sailed forward and mercilessly pierced his targets. Thus, creating a symphony of shrieks/curses. The afflicted monsters, however, steeled themselves and continued pushing onward.

Tough crowd, he thought.

Not that that makes this any less fun. In fact, if anything, it only makes this all the more exciting.

After all, chasing these glitches down and dragging Geno's name through the mud was far better (and more entertaining) than watching all the abominations around the Multiverse get all the fun today.

He deserved to have a good time too. Plus, a break from destroying those stupid new AUs the Creators added.

"W-we should visit-visit Underfell n-n-next! Those s-silly, edgy monsters could use-se the opportunity to-to lighten up a-a bit." Blueberror called over his shoulder, adding his own attacks into the barrage.

They missed. Purposefully.

But the disguised destroyer smiled approvingly, nonetheless. "H-h-ha! I l-like the way-way you t-think. Abomination #13 n-needs to be-be taught a lesson-son for h-having the audacity t-t-to stop stocking h-his secret stashes w-with chocolate."

"M-mwehehehe! Perfect, I h-have pink and purple glitter t-to throw around-ound people's houses t-t-too!" His cohort cheered. "We c-can add extra in-in Red's sheets a-a-and clothes d-drawers."

It was moments like this that Error appreciated having the glitched Underswap Sans as an ally and not an enemy. The other was truly the evilest, most vile monster in the Multiverse.

(Somewhere in the coldest depths of an abandoned AU, a dark, negativity-laden skeleton sneezed before glaring around his bedroom, somehow feeling offended.)

With nothing more to be said, the conversation fell into a comfortable silence between them.

After a while, Error noted they were beginning to approach the entrance to Waterfall. A fact easily recognizable from the way the icy pines and snowy ground started to thin out, transitioning over to deep blue/purple stone and shimmering crystals alongside echo flowers.

His eyelights darted to the mouth of the crystal-laden cavern. Though his vision could hardly be considered perfect, he could still make out several escaped monsters on the other side. Each seemed to have some magic bullets summoned, given the ethereal crackle in the air. However, they were oddly aimed at the stony ceiling near the entrance.

Instead of him, the threat to their livelihood.

Why are abominations so stupid?

The destructive glitch's eye sockets soon narrowed in realization. Those bastards are planning to collapse the tunnel to prevent me and Blueberror from following them!

Stars be damned if those filthy glitches think I'm going to let that happen!

Error growled, pulling at his magic. A decently-sized Gaster Blaster spawned high in the air beside him. Magic gradually gathered in its maw until white/blue sparks crackled between its jaws, and the scent of ozone flowed freely.

He aimed it at the plotting monsters and prepared to fire-

"STOP!"

The terror-inducing duo slid to a halt and turned at the cry of a painfully familiar voice. And Error instantly regretted it. Because there, posed heroically in the thinned tree line, stood his greatest enemy: Ink.

Of course, now he's here to ruin the fun, the disguised destroyer internally grumbled.

The obnoxious artist (oblivious to what he had ruined) grinned, staring at Error with an intense excited gaze that sent a shudder down the red scarf-adorned skeleton's spine.

"Yes! We've finally caught you!" He cheered, promptly frowning and stroking his chin in thought. "Wait... Why was I looking for you again?"

Error groaned. It was just like the Protector of AUs to ruin a good time without even remembering why he was doing it in the first place. That had to be the third most aggravating thing he hated most about the artist. Something only triumphed by his nigh creepy tendency to stalk the destroyer through AUs, no matter what form he took.

Before Ink could clear his confusion (or say anything to lessen Error's annoyance), a thunderous crash sent everyone leaping.

With wide eye sockets, the glitch glanced over his shoulder. Where the entrance to Waterfall once laid only contained an impassible wall consisting of rubble- large stones and shattered crystals that would be a pain to move and weren't worth teleporting past. Meaning...

The townspeople escaped.

His face twisted into a snarl as his skull swung back toward Ink.

"Y-y-you id-idiot! Because of-of y-you, those di-disgusting abominations got-ot a-a-away!" He barked.

"Y-yeah!" Blueberror chimed.

"Huh?" The soulless skeleton frowned, raising an invisible brow. All the while, his eyelights shifted shapes/colors a few times - cycling through question marks, hourglasses, and spirals - then settled on a green upsidedown question mark and an orange triangle.

Error's jaws parted, prepared to spit all manner of insults at the other, but a bright yellow figure came rushing through trees with two Sanses less enthusiastically trailing after him.

"Ink, there you are! Why did you suddenly abandon us in the Ruins?" Dream demanded, rushing to his beige-clad friend's side.

In natural Ink fashion, the artist ignored the Guardian of Positivity and looked straight past him at the skeleton pair approaching the do-gooding duo. One had a dark flowing cloak, and the other had a red scarf almost identical to the item currently wrapped around- It's Geno and Reaper.

Error resisted the urge to slap his forehead. Ugh, why are they here too?!

While he cursed their appearance, Ink beamed as they slowed to a stop where everyone had gathered.

"Oh! Hey, guys!" He said, pointing a paint-stained phalange at him. "Look, I found the weird Sans!"

All heads- aside from Blueberror's and Error's own, of course - turned in the indicated direction.

"Huh... So he wasn't lying." Geno mumbled, eyeing him critically.

At the same time, Reaper tilted his head and got an interesting look in his eye sockets the disguised destroyer didn't like in the slightest. "Well, this is unexpected." The deathly skeleton paused, adding, "He's kind of hot-"

"E-ew," Error exclaimed while Geno immediately whirled around, hissing, "Reaper!"

The God of Death squawked, narrowly stepping out of the way of the swift hand aiming to swat his arm. An action that merely served to cause his husband to glower.

As the lovers bickered, Dream decided to examine him and Blueberror. His yellow eyelights looked them up and down individually before snapping back to the latter.

He gasped, crying, "Wait- Blue, what are you doing here?!"

The glitched Underswap blinked, then a devious grin flashed across his face and found itself promptly replaced by faux innocence.

"T-terrorizing people? Destroying-ing t-t-things? H-honestly, Dream, th-that much should be-be obvious." He replied, voice laced with an artificial sweetness Error thought only PTA mothers were capable of.

"But why?!"

Blueberror shrugged, summoning a volley of blue/white bone attacks and shooting them at the two Star Sanses duo. Ink and Dream dodged to the best of their abilities but still got nicked by the blunt edges.

Their pained yelps snapped Reaper and Geno out of their little world, causing the couple to take battle stances against their perceived enemy. Against Error.

It was almost laughable to challenge him, the destroyer of AUs. But given the day, he was willing to entertain them. If only because it meant more entertainment for himself.

The disguised destroyer waited, giving them the liberty to make the first move. However, as soon as they realized he wasn't attacking, their will to fight vanished, and they... stared. Awkwardly.

After a second, Geno briefly glanced away and scratched behind his neck.

"So you... you actually exist, huh?" The bloody glitch mused, his expression soon lost every ounce of composure, leaving solely rage. "Do you have any idea how much trouble you've caused me?! Quit wearing my clothes!"

The sentence "But I am you, so they're my clothes as well" crossed Error's mind, but he held his tongue and instead pulled his teeth into a sly smirk and jeered, "O-oh, so-so you get th-this upset w-w-when Reaper steals y-your pants?"

Geno recoiled, a thick red blush blooming across his skull. "Wha- Leave my relationship out of this!"

"Can I marry both of you?" A voice suddenly interrupted.

Both skeletons turned their head toward the speaker, twin looks of confusion gracing their features. When the words finally registered, Error's face pulled into a tight grimace, and Geno shot his husband a scathing glare.

"W-wha..."

"Reaper!"

The death god held up his hands in surrender and took a step back. "What! It's a valid question."

"It-it isn't, y-y-you fr-reak!" Error snarled. "C-come on, Berr! L-l-let's go. The-the winged c-creep ruined-ed the mo-moment."

"A-aw..." He heard the glitched Underswap Sans whine from where he was, for a lack of better words, play-fighting Ink and Dream.

The disguised destroyer rolled his eyelights and used his magic to reach for the vast, white realm he called home. A blocky, glitching portal sprung up in front of him.

Blueberror skipped to his side and stepped through. Error quickly followed suit. The sooner he got away from Reaper the better, after all.

Unfortunately, as soon as he passed the threshold, the aforementioned death god cried, holding a hand outstretched toward him, "Wait, what's your name?"

"Byte- A-as in, b-byte the dust-dust and l-l-leave me a-alone!" Error growled, slamming - as much as one feasibly could - the portal shut. Thus, leaving just him, his bean bag chair, his Anti-Void, a concerned Blueberror, and the young silent skeleton bearing charcoal wings and plague doctor's mask cutting open one of his puppets with a scalpel-

"W-wait- Who the-the h-h-hell are y-you?!"