Damien Rahm had always enjoyed building things. Since he was a small child he liked to take things apart and put them back together. He later made his own business inventing new products and other things, and made millions. But enough was never enough for Damien. He had a lust for power, always wanting more. No matter how much money he made, or how much land he owned, he could never quench his thirst for power.
So he kept inventing, making more products, making more money. Until one day, while staring out his window on his private island. A blinding light filled the sky. Moments later it vanished, and Damien went to go investigate. What he found would change his life forever, and give him a chance at what he wanted most: everything. What he found lying on the ground several feet from his house, was an unconscious unicorn. Over some days Damien came to be sort of fond of the unicorn, for it shared his lust for power. He was also fascinated by the unicorns powerful magic, and wanted it for himself.
So Damien got to work, studying magic. And, eventually, he found out how to harness it. But of course this was not enough for Damien, for upon hearing the unicorn's tales of Equestria, and all it's magic, Damien decided he wanted more. That's when he built his best creation yet, a device that can allow passage between dimensions. Using the unicorn's magic it was able to rip a hole, and then the device opened it and made it visible.
Damien thought back then, and to think it was only one or two weeks ago that he found this remarkable unicorn on his island. And now it had finally brought back another, a pegasus. Now all he had to do was deploy his men to get her before she removed her dress. And after the other five are brought here, he will have the most powerful magic, able to power his latest invention.
"Aha! exclaimed Damien, "she is showing up on the monitor. BALROG!"
"Yes sir?" Damien's burly assistant asked.
"I need you to take your men and go to this location to pick up the pegasus." Damien pointed at his monitor.
"It might not want to come nicely, so if it tries to run take out it's wings."
"Yes sir!" Balrog said and gestured for his group to follow him out the door.
It would have been so much easier to send the pegasus back through the hole that was already made several feed from his house, but according to his unicorn friend the other end was not as convenient to get her through. So the hole had to be made wherever the pegasus was at the moment, and the hole in this dimension would appear at some random location. But lucky for Damien, as long as she wore that dress he could track her. Now he just needed to get the other five in this dimension before they removed theirs. They had never sent other things to this dimension before, so his unicorn friend was to come here briefly to confirm that it worked before going back for the others.
Just then the door opened and Damien greeted her. "Hello, Trixie."
"Hello, Damien."
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After a couple hours the party started to end, and everypony started to leave. When Twilight was ready to leave, she walked over to Rainbow Dash and Apple Jack who were talking with worried expressions.
"Hey guys, what's going on?" she asked.
"Twilight!", Apple Jack said, "Have you seen Fluttershy? We can't find her anywhere."
"No I haven't" Twilight replied.
Rarity saw them and walked over. "Has anyone seen Fluttershy lately?" she asked.
"No that's what we were just wondering," said Twilight.
"Why don't I search all over the castle", offered Rainbow Dash.
"Good idea," said Twilight," I'll go ask the princess if she knows where Fluttershy is."
Pinky Pie was begging Octavia to play another song and Twilight called her over as they walked out.
Rainbow Dash removed her outfit and gave it to Rarity.
"Without this I'll be able to go faster," she said and took off through the castle.
She checked in every room, every hallway, and still couldn't find Fluttershy.
So she returned to her friends defeated, but found that no one was there. She flew outside to find Celestia saying goodbye to some ponies, and she asked them where everyone was.
"Zecora came and told them she had found Fluttershy in the everfree forest. I have no idea why she would be there either, but Zecora has never been known to lie."
Celestia paused for a few seconds and said, "But there seemed to be something different about her. She was the same Zecora but something about her personality was...off. Why don't you head over there and make sure that everything is alright."
"On it," Rainbow Dash said.
She flew over Canterlot and felt the wind flow through her cyan feathers. She always loved to fly, but there was an urgency in Celestia's voice and Rainbow Dash tried to hurry as she flew towards the everfree forest. She doubted they were there yet, but she didn't know where they would be right now and decided to go there and wait for them.
She went to Zecora's house and waited by walking around that house and looking at the strange masks. After a while Zecora entered.
"Zecora! Where is everypony?" said Rainbow Dash.
"Rainbow Dash! I forgot about you...uh they all went home" Zecora said.
"Did they find Fluttershy?" Rainbow Dash asked wondering why she wasn't rhyming like she usually does.
"No," replied Zecora, "But I have something that might help you find her."
She placed a strange circular device on the ground in front of Rainbow Dash and turned it on.
"I'll be right back," she said.
She left the room and a few seconds later Trixie burst through the door.
"Trixie?!" exclaimed Rainbow Dash.
Trixie smiled."Hello Rainbow Dash," she said as her horn started to glow.
"What-" Rainbow Dash started to say, but then Trixie shot magic into the device and the house was filled with a bright light and Trixie turned away. When she turned back Rainbow Dash was gone. But then she realized something and groaned. She wasn't wearing the dress Rarity had made with the material she supplied. There would be no way for Damien to track her.
"I'll have to bring her to Damien myself" she sighed and pushed a different button, opening the hole. Something about the ripping of the world makes someone get sucked in if they're near it and the force knocks them unconscious. But now that the hole was already there all the device had to do was enlarge it and Trixie was able to pass through unharmed. Before going through she remembered she'd have to contain Rainbow Dash, and grabbed some of Zecora's rope. Then she went through the hole into the human world.