Magic Is A Pain Sometimes

The four girls now understood each other, and Sonata had promised to buy Sunset a burrito. Obviously, when they got back to the human world. It was quite clear that the Dazzlings could not sing their way out, and Sunset's magic was unpredictable, so she didn't want to use it. She had tried signing, but she had no magically-enhanced voice. Their only hope of escaping relied on writing a letter to Twilight in the journal.
"Dear Twilight," she said as she wrote, "I am currently stuck in another dimension with the Dazzlings, but it's not as bad as it sounds. They are - for want of a better word - reformed, and we could do with some help getting out of here."

The Dazzlings are good. They never meant to hurt anyone, but Starswirl saw them as a threat, so he banished them. Then, long story short, they reached the human world, hoping to reach Equestria. They're even being nice to me, so I would really appreciate it if you could break us out of here.

I have never seen the world through their eyes, but I am astonished at how similar their lives are to mine is, or was, depending on your perspective. I feel that they could do with a second chance (and an apology from Starswirl!) when we are free,but of course we have to be free first. Wait, I've lost the thread of this letter, but I think you get the point.

"Please help out as soon as possible,
Your friend Sunset," she finished. A reply whizzed through within seconds. Sunset read aloud, "Starswirl is here. He says there is no way to escape unless you use REALLY powerful magic. Even he isn't strong enough to help. Even he and all the Princesses AND the Elements of Harmony. You have to break out from the INSIDE. Oh my, I'm hyperventilating. Have to go, dragon problem." She groaned in unison with the Dazzlings, then looked around nervously at the wasteland. This was no place to be imprisoned for centuries. She began to panic, and had to sit down.
"Woah, calm down, you're glowing!" Sonata told Sunset. She was right - Sunset's hands were glowing with magic, as if on fire, and it was spreading slowly up her arms. Sunset slowed her breathing and the glow stopped spreading.
"Wait, you used magic to come here, surely you can use it to make a portal back to your house?" Sonata questioned.
Sunset thought about this and said, "I could. Recently, my magic has been - for lack of a better word - weird, but I could try."

The Dazzlings stepped back to let Sunset prepare. She focused on her magic and moved her hands around, feeling for a fault that could allow her to open a portal. She got up and moved around, but there wasn't any sign of a fault. She knew that she would have felt a tingling sensation in her hands, the same tingling brought on whenever she neared the portal at Canterlot High School. But there was nothing. If she wanted a fault, she had to make one. She stomped her foot in anger and frustration and disappointment. Then she was surrounded by her magic and felt herself being lifted into the air.
Remember me?! a sinister voice said in her head. Her inner demon. The same demon who had taken over at the Fall Formal and tried to take over Equestria. I'm coming back, I'm coming back!
"Help!" she yelled. The Dazzlings looked up and gasped. "I need a hand!"
They can't help. Only YOU can stop me, and by the look on your face, you have no idea how to!
That pushed Sunset over the edge. She resisted, pulled against the magic she couldn't control. She remembered placing Twilight's crown on her head and the feeling of being overwhelmed by magic. She could not let herself be taken over again. She pulled harder.
No no no no no! her inner demon shrieked, fearing she would escape.

Sunset was pulled into the huge sphere of magic. She could feel her inner demon trying to take over.
"No," she said aloud, "you're in the past. You are not me."
"We are the same," it said through her mouth.
Singing broke through. "Me and you, you and me, why don't we see who is better? We don't have to be one and the same thing," the Dazzlings sang note-perfect. It boosted Sunset's confidence.
"Yes, why are we the same?" she asked herself. "We're not. We used to be. I was what you would call a bad girl. Not any more."
"We are the same."
"No. I have a song to remind me that we are not." She cleared her throat, then sang, "I may not know what the future holds, but hear me when I say, that my past does not define me, 'cause my past is not today."

As she sang the final, high, note, the magic around her exploded outwards. Sunset had a pair of huge, feathered wings, pony ears, a tail, and a long, golden horn. Her skin was covered in that magical, fiery glow again. The Dazzlings stared at her, each mouth forming a perfect comical O.
"Woah," breathed Adagio.
"That," whispered Aria.
"Is cool," finished Sonata.
"I know," replied Sunset. She flew down to them. "And you helped me. When you were singing, every note was perfect. There was some kind of - magic - in you. Those necklaces of yours may be destroyed, but I don't think you need them. You could spread positivity and friendship with your voices. Who knows where this could lead you?" As she said this, a portal opened to Sunset's bungalow. She smiled and said, "Apparently it leads you to the human world. I'm not surprised. We could all do with some positive vibes from time to time."

They all walked through the portal and into Sunset's kitchen. As Sunset left the wasteland, her ears, tail, wings and horn disappeared. At the last moment, Sunset used magic to grab her journal and the pen before the portal closed.
"We should go," said Adagio.
"No way!" cried Sunset.
"The last time we saw you, we had tried and failed to kill you and your friends. I'm pretty sure they don't want to see us again."
"No. I'm sure they would forgive all of you if you explained to them what you've been through. But I can't let you just walk off. Almost every creature in Equestria, be it pony, dragon or three-headed dog, has an identical person here. I can't let you run into yourself."
Aria laughed, "You're kidding. There could be another us?!"
"Not kidding. I don't think I could handle two of each of you, so I think you should return home."
They stared at her. "Equestria?" they asked together with doubt.
"Exactly. You were under pressure when you attacked Equestria. You can be excused."
Adagio smiled. "Girls, we're going home." The smile faded. "But aren't you a unicorn? How comes you won't go back?"
"Well, Equestria didn't like me. I probably could go back, but I've made this place my home. Plus, Princess Twilight wants an ambassador here in case any weird magical threats pop up. Come on, we should head to Canterlot." Sunset scribbled in her journal, "Hey Twilight, Dazzlings are coming home to Equestria," and the girls left the bungalow. Sunset locked the door and they made their way to the bus stop.