The House of Undertale AUs

Chapter 3: Error

Frisk's POV:

I didn't like seeing three Sans staring at each other. One was the Sans I know, with the blue hoodie. Another one had a large paintbrush on his back and the third one kept glitching out and reappearing once more.

"Hey, kid," I heard Sans' familiar voice. "Put down that knife." When Chara didn't do that, I had to nervously push down his arm a little. With a sigh, Chara finally put his knife down.

"So... what are you doing here?" Sans asked.

The one with the paintbrush replied, "Oh, I was just here to talk to Error, but you can listen too."

"Ink, I don't th-think that he should know about it yet-yet," the Sans that was glitching out, Error, said to Ink.

"And why shouldn't he?" Ink protested. "He has the right to know."

"Do you guys have to talk about whether I get to listen or not while I'm standing right here?" Sans asked loudly.

Ink and Error stared at Sans, then looked at each other. "Yes," they both said at the same time. I giggled while Chara looked up at the sky with a sigh.

"Hey, smiley trashbags," Chara said. "Not to be rude, but what's this all about?" Ink frowned at the sight of him.

"Huh, a Pacifist timeline yet you're still here," Ink muttered.

"What?" I asked meekly. For the first time, Ink saw me peeking out from behind Chara. His mouth opened and then he teleported behind me.

"Hey! Stay away!" Chara swirled around as Ink walked closer towards me. He had what it looked like a state of shock.

"Wow..." he smiled. "You really do look a lot like your sister, Y/N." I flinched. I haven't heard my sister's name for a long time.

"You have a sister, kiddo?" Sans said. "Congrats. Now I know that freak here isn't your only sibling." Chara started walking towards Sans but I pulled him back.

"You are dead, trashbag," Chara promised Sans with that creepy murderous smile that he likes to do whenever he sees Sans.

"Chara, don't," I whimpered, tugging on his sweater. He looked at me and finally calmed down.

"Anyways, what's going on?" Sans asked Ink and Error. "Why are you here?"

"We're here to save your timeline," Ink said proudly.

"Excuse me?"

Ink sighed. Then, he gave an explanation (like the one he gave to Y/N. You know by tapping your forehead) to Sans, then me, then Chara. I gasped as I saw the conversation between Ink and my sister, who I haven't seen for so long. I felt a pain in my heart.

"Gee, who's the nice girl that looks like the kid here?" Sans asked.

"Oh, that's Frisk's sister," Ink answered. "They looked sorta alike but Y/N is older."

"Ink..." Error warned.

"Alright alright," Ink said angrily. "Welp, I have to go. Me and Error have to find our mystery dimension destroyer. See ya." Ink used his paintbrush and made a white portal with rainbow colors for the border. They both walked into it and disappeared.

"When you teleport, does it always have that annoying popping noise?" Chara grumbled.

"I don't know," Sans replied, his hand raised. "Let's test it." He snapped his fingers and teleported around Chara like a thousand times.

"Ok, ok stop!" Chara screamed, his hands covering his ears. "I got my answer now stop!" Sans stopped and chuckled at Chara.

"Man, I was just... popping with excitement," Sans laughed. Chara snarled while I giggled a little.

"SANS!!!!" Papyrus' voice yelled.

Y/N's POV:

"So, Core Frisk wants us to merge?" I frowned. "What does that mean?"

Gaster talked as he took off his lab coat. "She wants you to host me. You will have my powers and such."

I've read way too many Kane Chronicle books so I understood what he meant.

"I can do that," I shrugged. Gaster frowned and then he sighed.

"Alright then. But first, we need to make some stuff if the AUs are coming," Gaster pointed out. I nodded.

"You have any ideas?" I asked. Gaster thought for a while.

"How about..." he whispered the idea to me and my eyes widened.

"Yes," I laughed. "That's the best idea you've come up so far." Then, I frowned. "How are we going to make that?"

"It's easy, really," Gaster said while writing on a piece of paper. These days, he really knew how to multitask. "All you need are my powers and your ability to think and imagine."

I rolled my eyes. "Really?" Gaster nodded.

"Really. Oh and you also need your strength, determination, and courage."

"I think I already know that."

"Good, then. Let's begin."

(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)(~)

Hey guys! Welcome back. Are you ready to merge with Gaster? Probably not. But trust me, you'll look awesome once I show you the picture of how you would sorta look like.

In case you haven't noticed, you're a girl. Sorry everyone who's a boy but just roll with it.

Peace ☮️