This is an undertale and fairytail crossover (obviously)

First of all, sans and papyrus are going to stay skeletons because it isn't necessary to turn them into humans since the story is happening in the fairytail universe and there are a lot of weird creatures and monsters .

Second, this is my first story/crossover so don't expect it to be good .

Let's begin !

It was an usual day at snowdin,kid were playing with snow,royal guards doing their patrol, papyrus burning down the kitchen and sans sleeping on the couch, until something strange happened near the skele-bros house, a giant black portal opened up which sucked up the hole house,it was falling in a black endless void until it got through the end of the portal now it was falling in the sky, well papyrus was too busy putting down the fire to notice, and sans was still sleeping, until...

*CRASH*

The house crashed in the middle of a plain, it completely fell apart, luckily sans and papyrus were ok and got outside, pap said "OMG SANS WE ARE IN THE SURFACE !!"

"But how ?" Asked his brother dumbfounded.

"I DON'T KNOW BROTHER, BUT LET'S GO MEET THE HUMANS AND SOME POTENTIAL NEW FRIENDS." said his brother exited.

"Wait paps do you hear that? It looks like someone is fighting."

"OMG SANS, LET'S GO SEE THAT!" exclaimed papyrus with stars in his eyes .

He ran there like a kid at Christmas, and sans used one of his shortcuts, when they got there, they were dumbfounded, the skele-bros saw something extraordinary, it was humans fighting bandits with their magic, a guy with pink hair spitting fire, a girl summoning spirits from another world and something sans and papyrus didn't see in their hole life, it was a flying blue cat, papyrus was amazed at how the humans were fighting those bandits,they defeated all of them, well that's what we thought, until one of them snuck up behind the girl attempting to stab her, that's when sans teleported right besides the bandit, and used his gaster blaster to save the girls life.

"Wow that was a blast, heh." Said the comedian.

"OH MY GOD SANS ! EVEN IN BATTLE YOU MAKE PUNS!" Said papyrus out loud from the bush.

The three wizards were dumbfounded, where did these skeletons come from? How did that short one summon that giant dragon skull to save the girls life? Their thoughts were cut off when sans appeared suddenly behind them.

"Humans don't you know how to greet a new pal, turn around and shake my hand." Said the short skeleton in a scary tone, this sent shivers down their spine. They did as he said until...

*Pfffffffff*

A loud fart noise came out of his hands, sans, the pink haired teen and the cat fell on the grass laughing, the girl was annoyed and papyrus...

"OH MY GOD ARE YOU SERIOUS " he was mad.

"Anyway, who are you guys? And why did you save me?"asked the girl.

"I AM THE GREAT PAPYRUS AND THIS IS MY LAZY BONES BROTHER SANS, AND WE SAVED YOU BECAUSE WE COULDN'T STAY RIGHT THERE AND LET YOU GET HURT BY THESE SCUMS." Said the tall skeleton.

"Thanks for the help guys, by the way my name is Natsu the blonde girl is Lucy and the cat is Happy."said the pink haired teen

"Hey why won't you join our guild, you seem like really nice guys." Said Happy.

"Great idea happy." Replied Natsu.

"Don't you think that everybody would freak out about two skeletons joining our guild?"said Lucy.

"Nah, gramps would understand."Replied Natsu

"QUICK QUESTION, WHAT IS A GUILD ?"asked paps.

"WHAT?!" Said the three in unison.

"You don't know what a guild is? Were you living under a rock or what?" Asked the pink haired teen.

"A guild is a place where wizards like us find jobs to make money, but most importantly we're like a family in a guild." Explained Lucy.

"WOWIE, NOW I REALLY WANT TO JOIN A GUILD, WHAT DO YOU SAY SANS?" Said papyrus.

"If paps is joining your guild then me too." Said the comedian.

"But first we need to tie up those guys other there." Said Lucy.

"You can go begin without us paps, i need to have a little chat with those three, okay?"said Sans.

When paps started to tie up the bandits, sans and the others went somewhere where papyrus couldn't hear them, Sans closed his eye sockets and said "if you harm my brother..." he opened them showing nothing but blackness "YOU WOULD BE DEAD WHERE YOU STAND." This sent shivers down their spine "man he's scarier then Erza." Said Natsu

"Aye" affirmed Happy

"But i didn't say you couldn't spar from time to time." Said the short skeleton.

"What are we waiting for? Let's go !" Said sans.

Here you have it folks the first chapter, like i said it's my first story so don't expect it to be good , chapter 2 would come up soon, can't wait to read your feedback.