"I'm sorry if you think we're evil, Dash. We're not what people say we are", Freddy said.
"Don't sweat it, Freddy. William Afton has been a pain in the ass for my family for five years. Ever since Verdana's birth. We've been doing everything we can, but I don't think it's enough", Rainbow Dash said.
"She is adorable, I'm not gonna lie. Congratulations, by the way", Freddy said.
"Heh, thanks. Once the party is over, we'll help you guys out", Rainbow Dash said.
"Excellent", Freddy said.
After the party...
"Yar, guys! I found a dead pony", the raspy-voiced animatronic said.
"Ah, that's creepy! Thanks, Foxy. I'm gonna have a hard time sleeping tonight", Rainbow Dash said.
"Hmmm, these gashes look familiar. It's not a coincidence", Fluttershy said.
"What does it mean?", Chica asked.
"It means that the pony race is also in danger. Verdana, you said there were ten dead ponies in Equestria, correct?", Bonnie asked.
"Yeah, at least that's what my mothers told me. Moms, what are we gonna do?", asked Verdana.
"We keep- holy shit!", Rainbow Dash said. "There's a pair of lungs right here!"
Everyone else in the room screamed. Chica fainted. "Ugh. Chica, we've seen worse. I mean, a dead body-", Freddy said, but was eventually cut off by Bonnie.
"Hey, watch it! There's a kid in the room!", Bonnie said.
"Heh, it's okay, Bonnie. She's listened to songs with swear words, like Five More Nights, Another Five Nights, and We Don't Bite", Rainbow Dash said. "What were you saying, Freddy?"
"A dead body's been completely ripped up. Looked like something that came out of a horror movie", Freddy said. "Anyways, Springtrap's been dead for a year, and the killings just started last year. So, Springtrap is innocent. Heck, he was probably the first one to get killed."
"Yar, hang on a minute, bucko. I recall seeing a pink Pegasus with blue curly hair near Springtrap's dead body.", Foxy said.
"Wait, a pink Pegasus? There's only one pink Pegasus we know", Verdana said.
"Cozy Glow!", Fluttershy and Rainbow Dash said in unison.
"You know her?", Chica asked.
"She's bad news. She must have escaped Tartarus!", Rainbow Dash explained.
"And she's psychopathic! She tried to take over Equestria! We have to stop her... again!", Fluttershy said.
"While we appreciate your enthusiasm, we don't even know where she is. Unless...", Bonnie said.
"There's a pattern. There's gotta be a pattern", Freddy said.
"What do you mean, pattern?", Fluttershy asked. "The killings were all around Equestria."
"Wait, no two killings were in the same place", Rainbow Dash said. "The killings were in Vanhoover, Manehatten, Baltimare, Fillydelphia, Canterlot, Manechester, Appleloosa, Las Pegasus, Ponyville, and Yakyakistan. That's ten."
"And now, there's a dead pony here. That's eleven", Fluttershy said.
"Cozy Glow is probably still here. This place is a maze", Chica said.
Just then, the lights went dark. Fazbear Family by Stupendium played.
"What the hell?", Foxy said.
The song was six minutes long. "I'm still here", a voice said.
"Show yourself!", Rainbow Dash said.
"Follow my voice", the voice said. The creature sang Welcome To Freddy's by Madame Macabre.
It didn't take long for the seven heroes to track the imposter down. She was in the office. "Cozy Glow!", Fluttershy and Rainbow Dash said in unison.
"Ah, we meet again, Fluttershy and Rainbow Dash. Oh, and I see you brought some friends. How fun. Too bad they won't live much longer. You see, I was able to escape Tartarus after ten years of careful planning. I've grown older and stronger. If you would've allowed me to take over Equestria, none of this would've happened! This is my world, and I deserve to be an empress! You might've thought I was gone, but I'm still here, and ready for REVENGE! HAHAHAHAHAHAHAHA!", Cozy Glow said.
"Yar, you forgot one thing", Foxy said.
"What?", Cozy Glow asked.
"Your power's running low. You're in our house now. Our rules", Freddy said. "We're homicidal! We're puppets taken by a jester in disguise!"
"It's a fact without the ties!", Chica shouted.
"Link us together! We're a family forever!", Bonnie shouted.
"Ready to show you our SURPRISE!", the four animatronics shouted in unison.
"Copyright infringement!", Cozy Glow said. "That's Unfixable by DAGames!"
"Damn it", Freddy said.
"I'm fully aware of the power in this place. Once the power runs out, I can escape!", Cozy Glow said.
"Shit. Bonnie, Foxy, block the exits. Chica, Fluttershy, bring Verdana to safety. Rainbow Dash, help me break this door down!", Freddy commanded.
"Right!", Rainbow Dash said. Freddy and Rainbow Dash pushed on the door with all their might, but it wouldn't budge. "It's too heavy! Stand back, Freddy!" Rainbow Dash flew to the end of the hallway, and, using her supersonic speed, blasted the door open!
"Whoa, that was awesome!", Freddy said.
"Ah, crap!", Cozy Glow said. "Well, I'm not leaving empty-handed!" She grabbed a sharp piece of glass from the shattered window, and stabbed Rainbow Dash in the heart!
"NO!", Freddy shouted. He talked into a microphone. "Fluttershy, get over here, NOW!"
"On my way!", Fluttershy responded. She flew to the office.
"F-Fluttershy?", Rainbow Dash asked.
"Oh, no! Dashie!", Fluttershy said. She ran over to her wife's side, picked her up, and cradled her. "Don't leave me, please!"
"It's okay. I'll be okay. Just promise me one thing. Keep Verdana safe", Rainbow Dash said. She gave her wife a final kiss on the lips and went limp.
"No!", Fluttershy said. "You... you... you MONSTER! YOU TOOK AWAY MY CHILDHOOD FRIEND-TURNED-WIFE! NOW, YOU'LL PAY!", she yelled. She grabbed a sharper piece of glass, and stabbed Cozy Glow in the heart and through the body. She ripped out the villain's heart, and smashed it. Blood sprayed everywhere. Freddy backed away fearfully as Fluttershy continued her bloody revenge on Cozy Glow. Soon, all that was left of Cozy Glow was a pair of wings.
"Okay, then. I'll go get the others. Fluttershy, clean this up, please", Freddy said.
"Yeah, sure", Fluttershy responded.
It didn't take long for Fluttershy to clean up the bloody mess. Rainbow Dash's body was lying in the corner, her vacant eyes staring off into oblivion.
"I'm sorry, Fluttershy. We couldn't save her", Bonnie said.
"Well, at least I avenged her. Cozy Glow is dead for good", Fluttershy responded.
Verdana flew over to her mother. "Mom, what are we gonna do?", Verdana said.
Suddenly, Rainbow Dash came back to life! "Whoa, that was trippy. I met my maker", Rainbow Dash said.
"Dashie!", Fluttershy said. The two Pegasi embraced tightly and kissed passionately.
"Mom!", Verdana said. She hugged both her moms.
The animatronics stared at the happy family. "Thank you, Puppet", Freddy said quietly.
In another location, a puppet-like animatronic smiled and sunk back into her box.
A final song played.
(Five Nights At Freddy's: Sister Location Song Left Behind by DAGames)