Night eventually arose over Canterlot High as all the students were attending the Fall Formal all dressed up for the occasion. A limo pulled up by the school, in which the Humane 6 got out all excited for the dance as they were now in their own Fall Formal outfits. Just then, a sports car pulled up from behind the limo, which drove off. The driver was revealed to be Flash Sentry, who got out and spotted Twilight going into the school.
"Twilight!" Flash called out to Twilight, getting her attention and catching up to her. "Hey, listen...I couldn't find someone to go with me to the Fall Formal. So, I was wondering if you would...like to...you know--"
Twilight was genuinely caught off guard when he asked her that. She then remembered how he went through the rejection and after all the poor guy went through, she figured maybe he needed a break from it.
"It's okay, Flash. I know about what happened." Twilight told Flash.
"Oh...you heard?..." Flash asked a bit embarrassed that Twilight heard about Sunset Shimmer rejecting him.
"Mm-hmm." Twilight confirmed. "And if you're still wondering, yes, I would like to dance with you."
Flash felt glad that Twilight accepted going to the dance with it. They walked into the building together, only for Flash to hit the closed door in front of him, where he decided to allow Twilight to go in first and enter last.
The dance was already a huge success. Everyone was at the dance floor having the time of their young lives. Up on stage, Flash Sentry was rocking it out with his electric guitar, whom Twilight waved at. Twilight then thought in the amidst of her and her friends' fun that something felt off.
"Anybody seen Sunset Shimmer?" she soon asked her friends.
"Maybe she was too embarrassed to show!" Rainbow Dash answered loud enough for everyone to hear her amidst the loud music playing. "She's gotta know you won by a landslide!"
"Maybe." Twilight said unsure if that was the case.
The song that was playing finally reached its end as the rockers left the stage and Principal Celestia walked up to announce the results of the ballot for Princess of the Fall Formal.
"First off, I want to say how wonderful everything looks tonight. You all did a magnificent job pulling it off after the...unfortunate events earlier." Celestia congratulated the students. "And now, without further ado, I like to announce the winner of this year's Fall Formal crown." As Celestia said that, Luna walked up on stage with the box that contained Twilight's crown and opened it showing it to everyone.
A sense of worry hit Twilight as she saw her crown before her and she knew that the fate of Equestria depended heavily on the winning vote.
"The Princess of this year's Fall Formal is..." Celestia announced opening an envelope and taking out the card inside where she read out loud the name of the winner. "Twilight Sparkle!"
The Humane 6, including Twilight, all cheered for Twilight's victory as they hugged each other. They weren't the only ones as everyone else cheered for Twilight's victory as well, unaware that both Snips and Snails were sneaking in. Twilight got on stage to receive her prized.
"Congratulations, Twilight." Celestia congratulated Twilight placing the crown onto her head. Twilight was glad to have her crown back and her friends watched on proud of her.
"TWILIGHT! HEEELLP!" Spike shouted in despair offscreen.
"Spike?!" Twilight exclaimed at Spike's plea before spotting Snips and Snails leaving the gym with him. "They've got Spike!" Twilight jumped off the stage and followed after Snips and Snails, much to everyone's confusion.
The two make a sharp turn to a left hallway, but as Twilight do the same, she ended skidding into some lockers. She soon spotted her friends tagging along also wanting to help rescue Spike from Snips and Snails, which she appreciated. Snips and Snails then passed by Trixie, who was about to get a snack from the vending machine when she saw the two and then the Humane 6. The two were still followed even after exiting the school, running over to the school's front entrance. The Humane 6 were about to catch the two, only to be greeted by Sunset Shimmer walking up from behind the statue.
"I wouldn't come any closer if I were you." Sunset Shimmer told the Humane 6 revealing to have a sledgehammer in her hands, to which Twilight recognized that she was intending to destroy the portal with it. "I tried to be reasonable, but you just wouldn't listen. And because of that, I'm going to destroy the portal."
"Wait, how are you gonna destroy the portal with a sledgehammer?" Rainbow Dash asked Sunset confused by her motivation.
Sunset then nonchalantly tapped the hammer to the barrier around the portal to answer Rainbow's question.
"Oh. I see. Thanks, I guess." Rainbow Dash said.
"Twilight!" Spike called out to Twilight trying to break free from Snips and Snails' grasp.
"Don't hurt him!" Twilight demanded.
"Oh, don't worry, I won't. That's why I'm giving you one more chance." Sunset stated. "Hand over the crown and you and your dog return to Equestria and never come back. Or else."
Twilight took off her crown and looked back at Spike. She knew she couldn't just give up one of the most powerful artifacts in Equestria, but she also knew that she couldn't sacrifice Spike for it, either. But soon, she remembered something she learned during her time here in this world.
"Before I answer, let me ask you something. If what you said about the mirror is true, does that mean you also had something to do with making my new friends fear each other?" Twilight asked Sunset remembering what the latter told her on her first day at CHS.
"Of course, it did, you idiot! I told you that a few days ago! The mirror showed me that it was possible for the people of this world to be able to use Equestrian magic, including the Elements! Why else did I keep their counterparts away from each other?!" Sunset answered revealing her motivations.
"So, you knew the Elements can work here and you tried to keep my friends away from each other so that no one could stop you!" Twilight called out Sunset.
"Only to make sure it didn't fall into the wrong hands!" Sunset rebuttled.
"But you'll be trapping yourself here, too." Twilight then reminded Sunset about the consequences of her shattering the mirror.
"So what? At least Celestia won't be able to enslave everypony.""Don't you all see? I'm the hero here. I've spent my whole time here looking for ways to protect your world from a truly evil ruler who has her own metal giants that spread fire wherever they go and leave everything they come across in their path into ruin." It was from that sentence that Twilight realized that there was more to Sunset's claims. Not exactly agreeing with her, but she did finally understood why Sunset was doing all of this, that she actually believed what she was doing was the right thing. "And if it means having to destroy the mirror in order to keep Celestia from using that power, so be it!" Sunset winded up the sledgehammer behind her to smash the barriers of the mirror.
"Alright. Go ahead." Twilight agreed to allow Sunset to destroy the portal, much to the shock of both Sunset and the other Humane 5.
"What?!" Sunset exclaimed outraged. "But Equestria, Celestia, and your friends and family! Don't you care about them or how they might not see you again?!"
"Yes. But I've also seen what the mirror has been doing to your mind and have you do her without magic. How do you know that what the mirror says is true, yet you haven't seen it done before your eyes? Equestria will find a way to survive without my Element of Harmony. You and this place might not if I allow the mirror to corrupt you even further. So, go ahead. Destroy the portal. If it's what you think is right, then I admire your act of bravery."
Sunset had nothing to rebuttal as her plans were now completely ruined thanks to Twilight. She felt utterly defeated as she dropped the hammer right next to her. Snips and Snails then reluctantly let Spike go, whom ran up to Twilight and jumped into her arms.
"You. Are. So AWESOME!" Rainbow Dash gushed walking over to Twilight.
"Can't believe you were gonna do that for us." Applejack said to Twilight touched by her sacrifice.
"It's no wonder you're a real life princess." Rarity remarked.
All of the praises being given to Twilight got on Sunset's nerves as she couldn't take it anymore and exploded. "Oh, of course, she is. She's Twilight Sparkle and Celestia prefers her over me because I can't make friends like she can!" Sunset sunk to the ground breaking out in tears.
Twilight showed sympathy for Sunset and felt maybe she should help her as she walked over to her side.
"Sunset...I can assure you that Celestia doesn't think that way about you. In fact, she hopes that you would come back." Twilight said to Sunset offering her hand.
Sunset felt like this was Twilight actually pitying her, which she wasn't too pleased with and tackled Twilight to the ground in a desperate attempt to retrieve the crown. This, however, resulted in Twilight losing her crown as it bounced from its side. Twilight reached out for it, but Sunset pulled her away to prevent her from doing so. Sunset then tried to reach for the crown herself, but was stopped by Twilight grabbing her by her foot. Sunset then saw Snips and Snails just standing and watching her, to her annoyance.
"Seriously, guys?! Don't just stand there! HELP!" Sunset told off Snips and Snails as she continued her struggle with Twilight.
The two did as they were told and ran over to retrieve the crown for Sunset. Though, unfortunately for them, Spike caught it with his mouth and they chased him all the way to the entrance.
"Spike! Spike!" Rainbow Dash called out to Spike signalling for him to toss the crown to her, which he did as he tossed the crown from his mouth above Snips and Snails to Rainbow Dash as she caught it in her hands.
"I got it!" Snips said grabbing hold of the crown and tried to take it, but Rainbow yanked it away from him, causing him to fall to the ground.
"I got it!" Snails said as he too, tried to snatch the crown, only to be stopped by Rainbow, who kept him at a distance while he reached for the crown, to no avail.
"Fluttershy!" Rainbow called out to Fluttershy tossing the crown over to her, where it bumped into her butt and she caught it before it hit the ground.
Fluttershy noticed Snips and Snails coming after her and immediately froze in fear. Applejack luckily brought out a lasso and wrapped the knot over Fluttershy, pulling her away from Snips and Snails. Unfortunately, Fluttershy lost her grip on the crown, resulting in Snips catching it.
"Okay, now I got it!" Snips said before Pinkie snatched it away from behind. "Hey!"
Pinkie then tossed the crown back to Applejack, who tossed it over to Rarity. Twilight saw that her friends manage to get the crown back and broke away from her struggle with Sunset to retrieve it. Unfortunately for Twilight, Rarity then saw Snips charging at her and immediately tossed the crown to where Twilight was with Sunset, which resulted in Snips ending up tackling both Twilight and Rarity onto the ground.
The crown then ended up in the hands of Sunset Shimmer, who looked at it in curiosity. She remembered what she learned from the mirror about how the Elements of Harmony would possibly still work in this world as she looked back at Twilight. Twilight looked at her with a look begging for her to do the right thing and hopefully hand the crown back to her, but Sunset ultimately decided to see if it was true by putting the crown on herself. Blue-green magic then enveloped the Element of Magic on the crown and then Sunset Shimmer, who immediately took notice and before she could react, she was trapped within a large beam of the dark magic, where its bright light attracted the attention of the students inside the school, whom investigated outside to see what the commotion was about. Inside the beam, Sunset was streaming tears of pain from the effects of the crown and all the memories of what she had lost. Soon enough, Sunset was transformed into the very personification of her inner anger, sadness and paranoia, all of which everyone at school had never seen from her until now. The now transformed she-demon shrieked like a banshee in a mixture of pain and anger as she then set her sights on Twilight and her friends. She manifested magic in her hands and then blasted them both at Snips and Snails, transforming them into demons as well. The two didn't act like their normal selves and showed the same kind of hatred for Twilight as Sunset.
Twilight's friends backed away from the now transformed Snips and Snails as Twilight soon heard the terrified students standing at the entrance horrified by Sunset Shimmer's new form, who turned to their direction, causing them all to flee back into the school in terror and lock the doors to prevent the monster from getting in.
"I wanted to keep you all safe from Twilight Sparkle, and yet she still manage to persuade you all into voting for her!" Sunset berated the students blasting magic at the doors and leaving a large hole of where they used to be. She saw how they ran away from the entrance to get away from her. "Perhaps now it's time I showed you what we're dealing with." Sunset told her classmates firing blasts of magic at everyone, turning them all into the same type of demons as Snips and Snails. "To me, my comrades." The demonic students did as she asked and gathered to her side. Sunset turned back to Twilight and her friends. "And as for the portal, I need it open at the moment. Now that I have one of the Elements of Harmony and my own army by my side, I can take back Equestria from Celestia's tyranny."
Among the transformed students was Flash Sentry, to Twilight's horror.
"Sunset! Please! Don't do this!" Twilight begged Sunset.
"Nice try. But I won't let you have me turn on this world for Celestia because now I have all the magic in the world to stop her and I have everyone turned against you!"
"Not us!" Rainbow Dash stepped in as she and the other Humane 6 backed up Twilight standing by her side.
"Very well. Then, you traitors will join her!" Sunset shouted conjuring up a ball of dark magic blasting it at Twilight. Her friends then tried to shield her from the upcoming blast as it made contact. Sunset looked on at where she threw the blast, but just as the smoke cleared, she saw, to her shock, a magic energy field had protected the Humane 6 from Sunset's blast. "What?!"
Twilight and the others got up and saw what was happening around them.
(A/N: Don't worry, I'm not gonna add in what Twilight said soon after.)
The crown then transferred some of its magic to the Humane Six, who then "ponied-up". I'm so sorry for even mentioning that last part.
Sunset tried to break away the magic going toward the Humane Six. However, she then felt a sharp pain on her back, like something had attached itself to her backside and felt like she was being drained of energy and she couldn't do anything about it. She soon felt the sharp pain suddenly stop and she gained control again, but it was no use as the Humane Six then used a blast of magical energy at her, defeating her. It also reverted both Snips, Snails and all the students who were transformed by Sunset back to normal.