Bill scowled at his black tank top, "Do I have to wear this?"
"Yes! You just have to wear a black tanktop and pants, and dye your hair red and your skin blue! Oh, and also hold a glowing blue spear!" Luna grinned, happily.
Bill sighed, "You DO realize that both me AND Will can make you all look like the character you're supposed to be, right?"
"No... could you?!" Cosmo asked, happily.
River sighed, "Atleast, make us look like human versions of the characters?"
'Of course, River," Will smiled.
He snickered, "Alright, fine."
After a few minutes...
River was dressed as a brown haired gender neutral human with a purple and blue shirt, black pants, and brown shoes, while holding a stick. Cosmo was dressed as flower with blonde hair, only wearing green, holding a golden flower. Luna was a brownish-red haired gender neutral human with a green and yellow striped shirt, pink cheeks, having red eyes, and holding a toy knife. Will was dressed as a white haired goat boy with a green and yellow striped shirt, green eyes, and holding a golden flower. He was dressed as a blue fish woman, with red hair in a ponytail, a yellow eye, an eyepatch, and wearing black clothes, holding a blue spear. Ford was dressed as a yellow dinosaur with a white lab coat, yellow hair, and glasses, holding a clipboard. Stan was dressed as a skeleton with a yellow shirt, a red scarf, and blue pants, holding a white bone. Aurora was dressed as a blonde goat with blonde hair, a black dress, a gold necklace, a purple cape and was holding a red trident. Dipper was dressed in a white shirt, a blue jacket, black shorts with a white stripe down the sides, a pair of pink slippers, with white hair, a blue eye and a yellow eye, and he was holding a blue bone. Mabel was dressed in a purple dress, having white hair, and holding a yellow crown.
The two oldest boys (Obvious) walked over to each other, happy with what they had done.
"Woah! I look just like Chara!" Luna smiled, before running up to him.
He backed away, smirking, "I thought Chara would want to kill Undyne, not hug her. I thought that was Frisk's job."
"Go, Frisk!" Luna smiled, poking River in the back.
River nodded, running up to him, "Hi, Undyne! Thank you so much!"
"So... what do our characters act like?" Dipper asked.
Will sighed, "We can mentally tell you, that'd make it easier."
"Sure."
Luna, Cosmo, and River held their plastic baskets in excitement. They all wanted to run ahead, but they didn't. He looked up at the dark, mansion in front of them.
"Are you sure this is a good idea?" Will asked, nervously, "It's a haunted house... you know that... right, Billy?"
He sighed, "Of course I know that, Blue. It's fine. It's just a house of a friend's. It won't take long, alright? You all don't have to go inside."
"I'm going inside!" Aurora, the triplets, Dipper, and Mabel shouted.
Will sighed, "Alright, I'll go too."
"Good. Come on, let's go inside," He grinned, knocking on the door.
The door eerily opened, and he walked inside, the other seven following behind him.
"Hello?! Sally! Jack! Anyone home?!" He shouted into the empty house.
A red haired woman, with blue skin, wearing a stitched up dress, and looking quite stitched up herself, looked over at them, "Oh! You're one of Jack's friends, aren't you? You're here to see him, right?"
"That's right, Sally," He nodded.
The woman nodded, looking at the six kids, "Wow. You have a lot of kids following. Can you tell me their names?"
"Well, that's easy. This is Aurora, my oldest daughter, my little brother Will, and the triplets, Luna, River, and Cosmo," He smiled, introducing them to the woman.
The woman smiled at all of them, "Hello, I'm Sally, Jack's wife of... hmm... about... 23 years or so, I think?"
"So it took him two years to propose? Funny," He snickered.
Sally nodded, "Well, you know how Jack is, Bill. He's very reclusive... but he's okay. I'll go get him for you, of course."
"Thank you so much, Mrs. Sally," He smiled, taking her hand and kissing it.
Sally blushed, before leaving to get her husband, "Jack!"
A skeleton man, wearing a black and white striped tux, with a white undershirt, and black shoes, walked into the room, noticing him, "Ah, Bill! I was waiting for you."
"Of course you were. Hello again, Pumpkin King," He greeted.
The man shook his skeletal head, "No need to call me that, Bill. We're good friends. I don't need you calling me the pumpkin king. Besides, I thought you were going to correct me, but... in front of these children, I understand. Are they all yours?"
"Only one of them isn't. That would be Will here, who's my little brother," He smiled, ruffling Will's hair, making him pout.
Will stared up at him in annoyed, "Billy... don't do that!"
"Sorry, Will. It's not my fault you're adorable when you're upset." He laughed, before looking over at the man, "Anyways Jack, you ready for the contest? I'm going to win, of course. Nobody can beat me in a contest like this."
Jack grinned, "Of course I am. It gets more interesting every Halloween. What's the stakes this year?"
"Hm... how about... if you win, I'll give you as many bottles of deadly nightshade as your dear lover Sally wants. However... if I win... I'll give you nightmares for the next year, until next Halloween, of course," He grinned.
Jack nodded, reaching his hand out, "Deal."
"Deal," He grinned, his hand on blue fire, grabbing Jack's hand, the fire growing until just under their elbows.
Jack walked out of the house, and Bill disappeared. The rest of the people in the house looked at each other.
Sally sighed, "They do this every Halloween... seeing who can scare more people. Of course, neither of them really cheats, as it's competing to see who's better at scaring. No doubt, that they both are, but... this will take a while. I'd suggest you go home. He'll probably come back in a few hours."
They all nodded, walking all the way home.
They stared at Bill as he walked through the door. He was drenched in water.
"What happened to you?" Will asked, confused.
He sighed, "Nothing, I'm fine. Jack won, and got a dozen bottles of deadly nightshade. No harm done."
"... Okay, then..."