Previously:
"Take these." He handed Mike his keys. "Come on, let's go, y/n." Mike said as y/n chased after him.

Mike drove the car his hand holding y/n's as they drove through the lights and traffic. They finally made it to the pizza place.

"You need to avoid the front entrance."

Chica waved Abby up to the stage.

"There's an outlet vent on the east side of the building. That's the best way inside."

Mike opened the vent and got inside, y/n following behind. Rats squeaked as they crawled through the vent. They finally made it. Mike watched as Abby got took to the back. Mike slammed in the vent as Bonnie tried to tell Freddy they were there but was stuck. Mike and y/n crawled out. Freddy looked over just as y/n and Mike ducked down.

Mike took a deep breathe as they went back to singing. Chica took Abby to the back slowly. The doors opened automatically. Mike saw Abby from the corner of the stage. "Chica where are we going?" Abby asked as the doors closed.

Mike threw a bucket of water at their feet and shot it as they electrocuted. They fell back as y/n ran up the stage while avoiding the water. Chica stood in front of the ella (I think that's the name) costume that was once in the storage room.

"Chica, I don't like this." Abby spoke. Chica eyes turned red and picked up Abby at put her near the spring locks. Abby screamed. Y/n ran to the door and opened it as she shot chica making her let go of Abby. "Come Abby!" Y/n yelled as she ran toward her. Y/n and Mike hugged her tight. "Are you okay? Are you hurt?" Mike asked.

"I don't know what's wrong with her. I don't know why she tried to hurt me." Abby said sadly. "I know. I know. Hey, Abby, listen to me. I've been an idiot about so many things. I've been stuck trying to fix the past, but you are the most important thing in the world to me, and I promise you I'm gonna do better." Mike said.

"I love you two. But we should probably go now." Abby said. "Right." Mike said as they all walked off. The cupcake turned on seeking revenge for his mother. Y/n helped Mike toward the door as Abby was far ahead. Suddenly the cupcake came out of nowhere and but y/n in the leg making her scream.

"OW WHAT THE HELL! OW! GIVE ME THE STICK THING!" Y/n yelled. Mike threw her the electro-wand thingy as she tried to electrocuted the cupcake.

Mike helped her as Abby ran out to hide. Fritz watched her from his stage as he went into the darkness and out appeared foxy. Y/n electrocuted the cupcake one last time as it finally fell.

(Short timeskip cuz I'm lazy)

Heavy mechanical footsteps came from the entrance door. The yellow rabbit or William came from out of the darkness of the door. He walked out the ground rumbling and making noise with each step. He grumbled as he looked at Mike and y/n. The bunny towered over them as he growled.

Mike shot at him but he didn't get electrocuted. William ran up to them and pushed them into the chairs. Y/n flung into some chair which made her leg break. Y/n screamed. Back at the ball pit Vince electrocuted foxy and picked Abby up.

"You couldn't just leave it alone, could you? Luck me. This is perfect. First I killed your brother. Now I can kill you and your lover. Symmetry, my friend." William said as he kicked and beat on Mike. "Go to hell." Mike said. William laughed as he kicked Mike again in the face knocking him out.

"Mike!" Y/n yelled. "Wake up, children. I have something for you to play with." William said as Freddy, Bonnie, and cupcake got up. "This is gonna be so much fun. Little ones tell me you have a sister. She will love it here." William said while oulling out a long knife. "You, however, are finished. Farewell, Michael Schmidt."

"That's enough!" Vince yelled.

He pointed a gun at his father. "A little old for temper tantrums, aren't we, Vince?" William said. "I'm not kidding, dad." Vince whispered. William removed his mask revealing Steve from job recruitment. "You may have forgotten your loyalties, but I assure you, they have not." William yelled as he threw his mask.

Y/n finally crawled over to Mike as Abby ran up to him. Abby and y/n tried to shake. "Mike! Please wake up!" Abby yelled. "Now, put that thing away and help me clean up the mess that you created!" William yelled. "Please. Please, Mike. Please." Y/n said as she kept shaking Mike.

"Come on. We both know you're not gonna use a g-" William said before his suit was shot at. The animatronics just watched as it happened. Mike finally started to wake up as the two embraced him. They looked back to the board. 'The yellow rabbit, he controls them.'

"The drawings." Mike muttered. They looked at one drawing in particular. "The yellow rabbit hurts your friends. Show them what really happened." Mike told Abby. William had charged at Vince and hit his arm making him drop his gun. "You had on job. One. Keep him in the dark and kill him if he got too close." William said.

"That's two jobs..." Vince said.

William started to choke Vince. Abby had ripped off an old paper taped to the wall. She drew fast on it as William kept choking Vince. Abby ran up to the wall and ripped the old one off. William saw this and went toward the girl. "No!" Vince yelled. "Let go!" William turned around. "I won't let you hurt her, too." Vince said.

William picked him up and stabbed him. "Dad." He muttered before falling to the floor. A hint of regret on Williams face showed clearly as he watched his son fall to the ground. "Vince!" Y/n yelled as she crawled over to him her one broken leg dangled behind. William turned around. Y/n was trying to help stop Vince's bleeding as Mike walked through the halls. Abby was putting up her drawing.

She put a tack on the drawing as the lights went out. "What have you done?" William asked. Mike continued walking and turned on the spotlight. The light showed a drawing with all the dead kids around a yellow rabbit. The animatronics looked at the drawing their screams playing in their heads.

They all turned toward William. "They can see you now. They know what you did." Abby said. "Move. Move!" William yelled at foxy. The lights shined on William as he blinked at the brightness. Mike finally made his way back to the room. "Mike." Abby said as she ran to him. Y/n dragged Vince to a nearby table and tried to treat him wound. "Look at you. Look at the nasty things that you have become. Look at how small you are, how worthless you are. You are wretched, rotten little beasts. I made you!" William yelled at them.

Cupcake launched at William biting his torso. His spring locks went off as he screamed. He yelled in pain as each one went off separately. They crushed his ribs then his organs making him have external and internal bleeding. He grabbed his mask. "I always come back." William said quick and loud as he put the mask on. Everyone watched as he dropped to the floor.

The lights fell off the ceiling as his mask eyes turned white. "What is happening." Abby whispered. "Spring locks." Mike muttered as they walked to y/n and Vince. Y/n grabbed a fallen peice of metal as her and Mike picked Vince up. They all walked out and he pizza place as the four children dragged Williams body.

It was all silence from there.