White glitchy portals opened and Sans, along with his skeleton brother Papyrus fell out and onto a soft green carpet.

Sans held his head in his hand, "Where the heck are we?" He mumbled.

"For someone who can usually catch onto things Sans, it looks like you could really could use a hand." A female's voice giggled.

Sans looked up to see a familiar nerdy, red haired girl, she held out her hand in front of him.

"H-S, long time no see." He smirked and took her hand. She pulled him up to his feet, then helped his brother. "Nice pun there." He complimented.

"Thanks." She smiled.

"WOWEE! I DIDN'T KNOW YOU COULD OPEN PORTALS HUMAN!" Papyrus shouted, clearly impressed on the transportation.

"You can thank Error Sans for that." She turned to a black, glitchy skeleton, who was playing with a pair of puppets.

Then another portal opened up and two more skeletons fell from it. They looked more sinister than Sans and Papyrus.

"Ow! Boss ya mind getting off me?!" The one resembling Sans shouted, his voice a bit more scratchy than Sans'.

"AFTER WE FIND OUT WHERE WE ARE!" The one resembling Papyrus screeched, also having a scratchy voice.

"Hey you two, glad you aren't late." H-S smiled at the two skeletons.

The darker version of Sans looked up at here, "Oh jeez, haven't seen you in awhile Red." He smirked, his one golden fang glimmering in the lighting.

The darker Papyrus stood up angrily and glared at H-S, "WHAT IS THE MEANING OF THIS?! I WAS PATROLLING FOR HUMANS!" He yelled.

"Sheesh calm down UF Paps, didn't mean to rattle your bones." H-S smirked.

Darker Sans and Classic Sans chuckled, as Classic helped up his darker version.

"WELL YOU WILL REGRET EVER CROSSING THE GRREAT PAPYRUS!" UF Papyrus posed as magic appearing wind blew against his scarf.

"Yeah, yeah." UF Sans groaned in annoyance at his brother's actions.

Just then another portal opened and another pair of skelly's fell from it. Only these two were swapped, the Sans looked more energetic with blue clothes and the Papyrus had a cigarette hanging from his mouth and he wore a large orange hoodie with cargo pants.

The Swapped version of Sans noticed H-S and his eyes literally had stars in them.

"H-S!" He cried and ran up to her, engulfing her in a spine-crushing hug.
"IT FEELS LIKE I HAVEN'T SEEN YOU FOR YEARS! YOU HAVEN'T MISSED THE MAGNIFICENT SANS TOO GRAVELY HAVE YOU?!" He asked loudly.

"Don't worry US Sans, I didn't miss you too badly." She reassured him as he let go.

"It's been awhile H-S." US Papyrus greeted.

"Yeah man, how've you been?" H-S asked, bro fisting him.

"It's been alright, nothing major." He shrugged.

"So, who else is going to be appearing?" Classic Sans asked Hailey.

Hailey thought for a moment, "Well I think that Geno Sans will be coming, and Science Sans... hmmm I don't know if maybe the BabyBones will show up, depends on Gaster.." She then lit up, "Oh yeah! And a new AU appeared not too long ago, so that Sans and Paps will be showing up." She explained.

"New AU?" The skeletons asked in sinc.

"She me-me-means a n-n-new alternate uni-uni-universe appeared outta-outta nowhere, another abom-abomination." Error Sans explained, his voice glitching.

"Do I really need to bring Ink Sans, Error?!" H-S asked agitated.

"NO-NO-no! H-He'll dump rai-rainbows everywhere-where!" Error groaned.

"Exactly, now can you put those puppets away? Gaster could see them and freak everyone out again..." H-S and the other non-glitching skeletons groaned at the memory.

Error then opened a glitching portal and threw his puppets into it.

H-S crossed her arms, "Error, where are the rest?" She glared.

He sighed and pulled more from the sleeves of his hoodie and in the hood, then threw them into the portal.

"Is that all?" H-S questioned.

He groaned and pulled three from his shorts pocket, then threw those in the portal. "TH-THERE!" He shouted.

Just then, another Snas looking skeleton fell from the portal, along with another skeleton, that didn't look like a Sans or Papyrus, instead he looked older and had a few cracks in his skull.

"You just had to jump into the portal, didn't you?" The Sans groaned at the other skeleton that was sitting beside him.

"Heh, look at that, the nerd's late." UF Sans smirked at the nerdy looking Sans. He held his hand out in front of him.

"Edgy!" The Sans smiled, taking his hand and being pulled up. "Didn't expect you to be here." He chuckled.

"Kinda hard to say 'no' to someone who knows how to bargain." UF Sans motioned to H-S.

"Science Sans, Gaster! Great to see you again." H-S greeted.

"As to you, H-S." Gaster replied and shook her hand.

"DAD!" Papyrus cried and engulfed Gaster in a hug.

"Hello Papyrus." He greeted quietly.

"He's just excited to see you after the Christmas party." Sans chuckled.

"Don't think you can start a party without me." A deep voice chuckled, and another Sans jumped from a portal. He wore a lab coat, red scarf and had a deep gash on his torso. He eye glitches, just like the portals.

"Hey Geno!" H-S and the skeletons greeted.

"YOO! You can't run from the freshness brah!" A voice called from the portal that Geno had jumped from.

"I kn-know that voice.. oh no... you didn't... you wouldn't." Error doubted.

Then in a freshness poof, a colourful ganster looking Sans appeared. "What's up my radical skelebros, and lady?" He looked at everyone with his swag glasses.

Science Sans shrieked and jumped into UF Sans' arms. "NOT HIM!!"

"What the frick are you doing?" UF Sans asked, growling quietly.

"Guys, some of you know Fresh?" Geno groaned.

"Nice to see you again my brosive, remember to stay away from those deadly in-toxins!" Fresh warned Science Sans in what sounded like a cheerful threat... well to him.

Science looked a bit horrified of Fresh so he hid behind UF Sans.

"Okay, one more portal!" H-S declared, "Now brace yourselves, these are a new Sans and Papyrus, so be good boys!"

Then the last two skeletons hopped out of the portal and everyone looked at them shocked. The Sans looked like US Sans and UF Papyrus, while the Papyrus looked like US Papyrus and UF Sans.

"D-Did UnderFell and UnderSwap have a baby?" Geno asked, kinda horrified.

The Sans scowled at everyone, "WHAT THE HELL ARE YOU STARING AT?!" He growled.

"Uh welcome SwapFell, Magnificent Sans and Papyrus." H-S said awkwardly. "Glad you could make it." She nervously smiled.

"See? Look at that m'lord, some acknowledgement." SF Papyrus said, no one knowing if it was sincere or sarcastic.

SF Sans grunted and continued scowling at the others.

H-S sighed, "Alright Error, is that everyone?" She asked the glitching black skeleton.

"I-I-I-i think so." He said glitchy.

He then closed all the portals.

"Alright, welcome everyone to the Undertale AU Party!" H-S announced, "I'm your host Hailey, otherwise known as H-S to the skellies! Now enjoy your sleeves in this comfy living area and kitchen!"

{Insert Comfy looking living room and cool kitchen}

"Now let's become familiar with eachother, if you aren't already!" She declared.

H-S pointed to the first Sans and Papyrus that came, "First we have Classic Sans and Classic Papyrus, from the original Undertale!"

Sans shrugged and Papyrus waved, as if he were on television.

H-S pointed to the second pair that came, "Next we have the darkest of the dark and basest of the bad! UF Sans and UF Papyrus from Underfell, where we put the kill in 'killed or be killed'."

UF Sans glanced away from the people's stares, while UF Papyrus crossed his arms and posed with magic wind blowing against his cape.

"Next we have the switch-a-rooed US Sans and US Papyrus from Underswap, the friendliest place ever!"

US Sans energetically waved at everyone, as if on tv and US Papyrus lazily waved.

"Let us not forget our favourite scientists from an earlier timeline, Science Sans and W.D Gaster!"

Science Sans dusted off his lab coat and Gaster waved.

"Now how could we forget the Aftertaler himself? Geno (Genocide) Sans!"

Geno shyly waved to everyone with a small nervous smile.

"Next we have the freshest of the fresh, he's the bro that makes you say woah, his favourite vegetable is brahcoli-" H-S paused at looked at Fresh. "Do I really have to say all this?" She groaned.

"You know it my brocita!" Fresh replied.

"Alright, he's the swaggiest of the swag, he the virus that will make you bomb-diggity! He's Sans from UnderFresh, who prefers to be called Fresh or the Fresh Lord!"

Fresh made his hands look like guns and pointed them at everyone.

"Next we have the glitchy blackberry himself! The lovably 11/10 for cuteness, Error Sans from ErrorTale!"

Error Sans was playing with his blue strings, trying to get his fingers untied.

"Now last but not least, we have the newest AU and Sans and Papyus, they are a combination of UnderSwap and Underfell, skellies and gentlemen, I give you the dark blueberry himself, SF Sans the Magnificent and his loyal brother SF Papyrus!"

SF Sans pulled up his gloves, while SF Papyrus smoked a cigarette.

"Now let's have a good time!" H-S concluded.

>>>>>>>>>>>>>>>>>>

Hey there! Hailey-Senpai here, thanks for reading till the end, anyways this is gonna work like Tumblr Asks do, you guys can ask any skelebros or Hailey-Senpai anything. It's kinda like a truth or dare, but this one is gonna be updated more frequently.

Everytime you ask something, you can chose to be anonymous or use your username, choice is up to you. You can also message me your questions if you want. You'll always get a shoutout whenever you ask.

If you guys need to know more or need inspiration for question, please check out my other Undertale book, Undertale Random Adventures: Senpai Edition

Now let's enjoy this story!