FNAF and Undertale Crossover: Nightmares Within

Michael POV

You could feel the pain. You felt like this was the end here...

"Michael, you're not dead. Your Soul refuses to die. Kill her"

You heard a voice, but you weren'tsure who it was. You did have a knife, and you weren't dead... yet. But, had a strong feeling from your Soul.

Your Soul, it's filled with... Determination.

*HP Restored!

You stood up with your eyes closed. When you opened them, you're eyes were red and you had a sinister smile. "Perfect, now we're even."

...

You were unaware of your actions. You were unconscious, but your body still moved on it's own. It attacked on it's own. You had no control.

Chara was taken by surprise as she perfectly dodged the attacks while Papyrus stood there with wide eyes. Chara got the chance to attack back but you dodged perfectly also.

While fighting, her knife glowed red. She raised it in the air and dozens of glowing red knifes were summoned. You raised your knife and a shield was summoned. You were able to block the projectiles.

...

Hotland
Sans POV

You were in Alphys lab for the pills for Michael. the nightmares are terrible for a kid like him, Alphys came to me with the pills.

"S-Sans, here's the p-pills you n-needed. Now w-who were these f-for again?" Alphys asked giving you the pills.

"they're for Michael. you see, he's been having these nightmares and it seems he's been having them for years! so uh, I gotta get these to him. he's too young to have such insane nightmares." I said leaving the Lab and waving at Alphys.

I took a shortcut to my house, hopefully Michael's here, if not then... wait.

You look at the house to see glowing red knifes. And glowing white knifes? Where did these come from?

You then realize what could be going on!

"Papyrus!" You shouted running to where he would usually be. But when you got there, Papyrus was no where to be seen... except Chara looking exhausted as she looked up at something.

It was Michael! He was aiming glowing white knifes down at Chara. He had a sinister smile on his face and his eyes were red.

I guess it ended up being a Genocide Run. No surprise there, that Demons gonna kill Michael... right?

Michael POV

"You're Power is running low Michael. Hurry up and end her."

You had to kill her, she was going to kill you. But, it's still Frisk's body. Chara's just using it.

You snapped your fingers to summon more knifes, but you summoned a skull instead. The skull was HUGE! It had sharp teeth and pointy horns. There was two horns on each side of it's head and in it's eyes were red glowing dots.

Chara showed fear on her face now. She dropped her knife as her red eyes went back to normal. Chara wasn't possessing Frisk anymore as Frisk gained control.

But it was too late as the Skull opened it's mouth, firing a red lazer.

Sans summoned a Gaster Blaster. The two beams collided creating a shockwave knocking all three of you down.

You gained control over your body as your eyes turned back to normal. You saw Sans and Frisk on the ground and got up but sat back down as your legs were sore. It hurts.

Chara is gone... for now. She's probably back in the Void with Gaster.

Sans got up along with Frisk. Frisk held a hand to her head as she felt pain. She knew she wasn't in control, but wasn't able to do anything.

"W-What happened?" Frisk asked.

"I can a-ask you the same thing because I couldn't control myself too." I said also in pain.

"heheh, aren't you forgetting about someone? where's Papyrus?" Sans said with a glowing blue eye. "also I got your pills kiddo."

"O-Oh, ok. Also, I think Papyrus ran to Waterfall for a meeting..?" I said hoping Sans would buy it. He just sighed.

"*sigh* oh well, I guess I'll believe you. there's snow proof you're wrong." Sans joked making you and Frisk laugh. "welp, I'm going to Grillby's. oh, and Michael, make sure to take a pill before going to sleep, ok?" Sans said and you nodded. He teleported away leaving you and Frisk.

"Well, that went well." Frisk said. "Now, let's go to Waterfall!"

Michael and Frisk went to Waterfall, but they didn't know they were being watched by someone angry.

"Pills from Alphys eh? Ok, let's see how it works."

Nightmare said then disappeared into the darkness.