"Come on Fluttershy! You promised!!"
"Okay okay, fine. I'll help with your portal overlap thing, but promise me nothing bad will happen to me!" Fluttershy said.
"Cross my heart, hope to fly, stick a cupcake in my eye! The only thing that should happen is you'll become a human like your CHS counterpart!" Twilight exclaimed with great confidence.
"Yes...should," Fluttershy mumbled under her breath.
The two ponies walked through Ponyville side by side. It was a long time before somepony spoke.
"Um...what does this spell actually do and why do you need me to test it?" Fluttershy said.
"Like I said, all it should do is turn you into your CHS counterpart. I tested it on Spike a total of exactly fifty seven times and all trials were a success! I just need to be sure that mass or species doesn't effect the spell's intended outcome. I'm sure that it won't, seeing as how most spells don't act that way, but some do. Once the spell is confirmed to be successful and harmless, I'll be a step coder to my ultimate goal! I want to be able to cast a spell on myself to keep me in my pony form when I go through the portal to Canterlot High. The first step is body transformations within the dimensions. Once my goal is reached, I can solve problems easily in their world. Does that make sense?" Twilight explained. Fluttershy processed the information, then nodded.
They entered the castle after some time of walking and chatting. Once inside, Twilight closed the door back and led Fluttershy to a room three floors up and near the back of the castle.
"This is the research lab I added! It's got all the equipment, space, and privacy I'll ever need! As well as instant access to the Starswirled the Bearded archives notes and scrolls! Celestia decided I should be able to study and make new spells without any disturbance and with any information I could need, so long as it gets send back, of course," Twilight said, standing in front of a blank wall before using her magic to make a steel door appear.
Fluttershy thought to herself, "How does she have access to the archives? And since when did she have a third floor to this castle?" She just shrug and decided not to question her friend.
"Aaaaaand, we're in! What do you think?"
"I-it's big. And very, um, sciency," Fluttershy said, stepping into the metallic chamber. It was a good size, roughly a twenty by twenty by twenty foot room, totally made of a durable metal in which Fluttershy couldn't identify. On the far right of the room there was a small purple box about a foot tall and four inches wide, large enough to fit a scroll inside. To the left of it was a pink box similar in size to its purple counterpart. Both boxes had an arrow and a scroll picture on them. The purple one had a scroll with a white arrow pointing down, the other had a scroll and black arrow pointing up. Against the same wall, there was a long table, about seven feet long, stretching to the corner. It had a microscope, magnifying glass, goggles, pages upon pages of notes and diagrams, and many other science and lab equipment along with other, more magical things. To the right of the mares' postition, there was a map of Equestria and just beside it was a map of a completely foreign world, presumably the human world, with a picture of a high school pinned to it. There was another picture with a group of six weird looking creatures on it, which Fluttershy recognized as her friends and herself. On the Equestrian map, there was a picture of her and her friends on it in front of the castle with the CMC in front of them. Fluttershy smiled and finished looking around the rest of the room.
"Well, I'd think it would be! I used a spell to keep it smaller from the outside while still having a large interior. I have a good partnership with a scientist in Ponyville who actually gave me information on what he calls "the TARDIS effect", which is how the lab is the way it is. Who knew that stallion was a scientist! I thought he only did clocks and timers for events and such, but I was wrong about that!" Twilight said.
"Oh..okay. The place looks great, though."