Arthur Note: I began with this story. I know nobody really has Nightmare Before Christmas and Undertale. So I'll be the first to do it! Here are a few things I want you to know before getting started.

1. Don't judge on my choice of the story also don't be rude! I hate it when people are rude and starting to slam my story down.

2. I know I'm bad at grammar and possibly punctuation (Sorry). If you want to comment me on that, that is alright as long you point out where it's at. Since this is going to be my longest story ever, I won't be knowing where my mistake is at.

3. If your confused of have a question let me know in the Review and I'd be happy to answer you question!

4. I'm making sure my paragraphs aren't too long for anyone to read. There were a lot of complants one I short of took off anyways because I short of lost the idea.

5. Please Do Enjoy This Crossover Story! (Read, Favor, Follow, and Review this story! If you really like it very much)

In a spooky town call Halloween Town, an eight year old girl with blonde braided hair, green eyes, wearing a black dress with a white belt around her waist has a blue crest in the middle on the belt is playing around in the graveyard. There floating next to this girl is the family ghost dog with a red pumpkin nose and wearing a black collar, barks happily.

Just then the girl heard her mother's voice calling her name. She ran over with the ghost dog close at hand. Once she came over to her rag doll mother side she glance up at her mother. The girl's mother has long dark red hair, blue fabric skin with stitches all over her arms, hands, face, legs, wearing a mix pattern color dress goes down to the knees.

The girl smiled and said "hi mom, we're here."

The rag doll nods says, "I see that Zero had fun too."

The girl looks up at the ghost dog and nods. Then the rag doll smiles at her daughter.

"Violet, the reason I call is because your father wants to take you somewhere."

Violet's eyes widened asking, "what is it?"

The rag doll cross her arms saying, "that would be telling and ruining the surprise."

"A surprise" gasp Violet, "I love surprises!"

The rag doll giggles then said with a wink, "you better go to him. He's waiting for you at the mayor's office."

Violet nods and ran off with Zero flying right behind her. The rag doll walk not too far where she watch her daughter running off to the creepy like abandoned town. Violet ran past all the buildings and the monsters that watch her ran.

She was super excited to find out what kind of surprise her father was going to show. Violet ran towards a big building with a huge clock and underneath has the words "Days til Halloween" on it with the numbers right beside it counting down the days til next Halloween. She ran up the staircase but began to trip when she was going up.

Violet fell down when she almost made it on the top. She scream as she fell. Thankfully not hurt when she fell. Soon she heard a worried tone male's voice coming out of the building.

"Are you okay, Violet?"

Violet look up to see a small round man has a two face figure one happy and one sad. Which is now has a face of sad and worry figure, wearing a long black pointy hat, a gray suit with a banner that say mayor on it, and a little black spider bow on his shirt. Violet look up at this little man.

"I'm okay Mr. Mayor, just excited to see what dad has for me."

The mayor's head turn around to a happy figure saying, "oh he told me all about it. I can't tell you because he wants to tell the surprise himself. He's right in his office signing a few more papers."

Violet thanked the mayor as she and Zero went into the building. Once inside she saw the vampires brothers cleaning up the big room a little bit. They had their coffins all in on space and some dusty old tables with one or two books laying on the table.

She look at the vampires for a little bit before taking off to her father's office. Which wasn't too far from where she's at. Once she made it to a small narrow brown wooden with holes door, she open the door up. There inside was a small room has a desk with some papers lying around on the desk, a large self off on the right side of the desk, and a big open window to see through. Right behind this gray desk is a tall skeleton man wearing a black suit with a white shirt inside and black pants with his black bat bow tie around his neck.

He has his large lamp shining down on the paper he is writing on. He was pretty focus on the paper. Violet slowly walk up to the desk with Zero right next to her. Violet sighs as she spoke.

"Dad, I'm here."

The skeleton didn't hear her nor lookup. So Violet tried again but still the skeleton didn't hear her. Zero knew what would make the skeleton catch the attention. Zero flew up to the skeleton and soon barked making the poor skeleton jump and push his red seat back a little ways away from where he was writing.

"Oh Zero, didn't hear you coming…"

The skeleton stop when he saw his human daughter happily looking up at him. The skeleton smiles as he stood up, brushing off his pants.

"Violet, I definitely didn't hear you coming in. Well I suppose Sally told you that I have a surprise to tell you."

Violet nods asking "so what is the surprise?"

The skeleton chuckle, "well I was thinking since you're going to be the next Pumpkin Queen someday. I thought that it would be only right if I take you to see the human world."

Violet's eyes widened with surprise and excitement, "really dad?"

The skeleton nods, "Indeed, your mother already pack lunch for us to eat. Once I sign this last paper, will be on our way."

Violet was super excited never had in her life ever had seen another human before. She's only seen monsters and creepy bugs. Never one of her kind. Especially being in her kinds town. Violet waited antsy for her father to finish signing the last paper.

The skeleton sighs when he finally finish signing and put the last one on to the side with the rest of the papers he signed. He got up and took Violet out of the office with Zero flying behind. Once out of the office, the skeleton and Violet walked a little ways till they spotted Sally holding two brown bags in her hands.

"Did you tell her, Jack?" asked Sally.

Jack nods, "I did, she's super excited to go."

Violet smiles wide, "I can't believe that I'm finally going to meet another human being like me."

Jack said correcting her, "there are more than just one Violet, just like the monsters here the humans have their own colonies. Though they are much larger than ours. (His voice tone down saddened) It wasn't like that till that brutal day."

Violet tilts her head in confusion, "what brutal day?"

Jack looks at his confused daughter, "oh never mind" he quickly said, "let's be on our way."

Violet could see that her father and mother were both hiding something from her, but what? Jack took the brown bags from Sally giving one to Violet. Jack kiss his wife on the forehead and telling Sally that he'll be back with Violet before supper.

Sally nods as she walk out of the building with Jack and Violet. Zero bark happily knowing that he'd be coming along with Jack and Violet.

Jack and his family walked till they got towards the darkest woods. Right beside them is a strange hill that curls at the end of the peak. Many in Halloween Town call the hill the Spiral Hill. Jack look at his wife again and said his farewells as so did Violet. Sally watch as her husband and her daughter began to walk into the woods.

Once she couldn't see them no more, she walk back home to clean the house up a little before her husband and her daughter arrival.

Jack soon use his magic that he received from the witches and once he threw it to where he pointed at. A large portal open up revealing a village with humans walking around. Violet was so amazed at what she is seeing. Zero barks happily as he was the first to fly into the portal.

Jack look at Violet holding his bony hand out, "are you ready?" he asked.

Violet look up and nods as she put her hand on his bony hand. Jack smiled and the two of them walk right into the portal. Once inside, the portal closes right behind them. Violet saw that there were so many species of her own just like in Halloween Town (except the creepy part), everyone seems to do things normally.

Jack explain to Violet that humans are much different than monsters in Halloween Town. They don't go around and scaring everyone they see. Humans works and make a living for their family. Violet love to hear all about her kind and what differences humans do then monsters. Violet happen to look up to see her father was a bit sad about something.

"Dad, what's wrong?"

Jack turn his attention to Violet and said with a smile, "oh nothing sweetie, just in my thoughts about tomorrow."

Violet had a feeling that her father had just lied to her. What was it making him sad? Was there something about this place that made him remember? Whatever the reason, Violet was going to find out. Jack kept on looking around and soon was distracted when he saw two humans men playing violins to earn money.

Violet wanted to explore more so she began to wonder off from Jack to explore the village. Zero happen to turn to see Violet was going away from Jack. Zero tried to get Jack's attention but Jack was too focused on the music. So Zero had to take matters in his own paws more like nose since he's a ghost don't have paws.

Zero flew off to get Violet back. Meantime Violet was having so much fun looking around and getting to see different humans like her. Nobody seems to pay any attention to Violet at all. Zero look around till he saw Violet going away from the village. Zero flew down fast towards Violet and began to bark to get her attention.

Violet look up and said when she saw Zero, "oh hey Zero, this is so amazing."

Violet look over to see a big mountain that wasn't too far from the village. Violet came up to the woods to see a large open path towards the mountain. Violet tilts her head and with her curiosity she walk down the path. Zero trying to pull her dress to not go any further but she didn't pay no attention. So Zero had no other choice but to follow. He didn't want to see Violet alone.

Jack gave couple coins to the two men and walks off. He happen to notice Violet wasn't with him. So thinking she wasn't too far began to look for her. After five minutes looking around the village, he began to realize that Violet did wonder off too far. But to where? His heart began to race as he began to run though the street looking for his little girl.

"Violet" he call, "where are you?"

Jack began to get worried and fear began to creep up on him. He wonder if she has been captured by a mean human being or she got too curious and wonder off too far. Either way he knew that his daughter was in danger without his protection. So he began to ask some humans if they have seen Violet, he also describe what she look like. Some humans gave Jack an odd glare, some just figure he was in his Halloween costume being silly, but they answer him that they haven't seen her.

Jack began to worry and he wasn't going back till he finds his daughter. To know that she's safe and sound. He then remember Zero so he put his bony finger together and whistle for Zero. He waited but no sign of his dog anywhere. Jack put his bony hand over his head and began to shake his head.

"First, Violet is missing now Zero is gone. What am I going to do?"

Jack began to search for his daughter and his dog. Wondering where in the world did those two took off to.

Violet and Zero walk down the path for a while till both see the path leading up to the tall mountain. Violet of course as curious as she is, went up the mountain. Zero wasn't too sure if it was a good idea, but he went following behind. Took longer going up the mountain then it was going through the woods. Violet wasn't tired at all since she was more too excited about what she's going to see.

Violet look over to see the path leading into a dark and creepy cave. To her it was just a new thing to explore. For most humans they would be afraid to go into a cave that was dark and spooky but since Violet is so use to dark and spooky it didn't phase her one bit. Zero close behind her making sure nothing would come to harm Violet.

Violet came up to the cave and peek in with Zero too peeking in. Violet happen to see a large open hole not far from the entrance. There were little golden flowers all around not far from where the rocks are at.

"Huh?" Violet thought, "I wonder how these strange flowers grows here."

Be pacific Violet was right. Flowers needs sunlight to grow and need oxygen to live. Yet these flowers are in the dark and damp cave with no oxygen or sunlight to hit them. That was totally weird.

Violet shrugs as she walked into the cave with Zero's glowing nose shining behind her. It was enough light for Violet to see the hole well. Violet lean over to see that the hole is pitch black. She wonder how far of a drop it was. She look in her hand to see that she still had her lunch in her right hand.

"Oh, I almost forgot I had this" she lift her lunch up so Zero could see.

Just then cracking sounds was heard. Violet got up and look around to figure out where that cracking noises was coming from. That wasn't too long to figure out. Violet look down and soon the rock fell beneath her and she began to fall, she drop her lunch which slide two feet away from her.

"Ah…" she cried.

Violet grab hold of Zero's collar as Zero whine to get away. Soon both she and Zero fell into the big hole. With Violet screaming for her life and Zero barking in terror.