"Now remember," Sunset said to Kim and Ron, "when you go through the portal, you're going to come out on the other side...different."
"Why is that, anyway?" Kim asked.
Sunset shrugged. "Humans don't exist in Equestria, just like Equestrian ponies and magical creatures don't exist here. Something about the portal's magic changes you when you pass through it." She braced herself. "Well...let's go." She stepped into the base of the statue, which rippled as she passed through it.
Kim and Ron turned to one another. With a shrug, they walked into the statue, followed by Sonata.
They were assaulted by a kaleidoscope of swirling, glowing colors. When Kim's vision cleared, she was treated to a lovely view of a cold, crystalline floor and a set of amber hooves. She looked up and saw a unicorn with Sunset Shimmer's hair and eyes looking down at her. "Welcome to Equestria," Sunset said.
"Ooohhhh...that was one wild ride," Kim said, struggling to stand. It didn't take her long to realize she had hooves; she took a moment to find her new center of gravity, then easily pushed herself up, her legs only wobbling slightly as she tried to figure them out. She felt the strangest sensation of having new limbs her brain wasn't quite familiar with; she decided to sort that out later. "So, uhh...what do I look like?"
Another unicorn—this one lavender, taller than Sunset Shimmer, and with wings—walked into view, smiling. "Just a moment; Spike is bringing a normal mirror for everyone." She looked past Kim; her eyes widened in surprise, and she was clearly fighting back laughter; her eyes shifted, and she tensed up.
Kim turned around. The first thing she saw was a mustard yellow donkey lying in a heap next to the portal. The next thing she saw...
A sky-blue creature like nothing Kim had ever seen flew around the room. The front half of its body was a light blue equine, with spindly legs and broad hooves. Its head was longer than the other two ponies in the room; the shape of its head was more like a dragon than a horse, and instead of a mane, it had a broad, spiny fin that stretched from the crown of its head to the base of its neck. The back half of its body was a scaly mermaid tail, with shimmering scales in shades of medium blue and violet, ending in a broad fin matching the one on its neck. The creature opened its mouth wide...
"WHEE!" it shouted excitedly in the ditzy voice of Sonata Dusk. "I can fly again! Oh, this feels soooooo gooooooooooood..."
Sunset stared at Sonata, jaw agape. "Wow. That's your real form?"
"Uh-huh!" Sonata said, doing a lazy midair flip, her long body undulating. She made a pained face suddenly. "Oooh...I feel kinda itchy..."
A faint red glow lit Sonata's chest, pulsing brightly before fading. The lavender pony gasped; her horn began to glow as she studied Sonata intently. She frowned. "Your...your magic gem is...regenerating," she said. "That's very strange..."
Sonata gasped. "You mean I'm getting my magic back?"
"I'm afraid so," the pony Kim had not yet been introduced to said. "And that...could be a problem."
Sonata sagged in midair. "You won't let me come home if I have my magic back, will you?" she said sadly.
"I don't know, Sonata," the lavender pony said. "It...it depends on a lot of things."
"Oh, man..." Ron groaned. "KP? KP! I've got hooves! I've got hooves!"
Kim sighed. "I've got hooves too, Ron. We were told about this..."
A fancy mirror on wheels rolled into the room, pushed by a small purple dragon. Kim stepped over to the mirror and studied herself. Her entire body, including her hooves, was the same vivid purple as her mission outfit. She still had the same green eyes and the same long, flippy red hair. An equally long, equally flippy red tail grew out of her hind end. There was an emblem on her general butt area: a gold medal engraved with a picture of the Earth, with a red, white, and blue ribbon.
She also had wings. "Okay, so I'm a pegasus," Kim said. "Sure, why not?"
"Ohhh, KP! That stupid portal made an ass of me! Literally!"
Kim turned to see the donkey by the mirror trying to stand up and failing. Ron's wide, fearful eyes stared out of its—his—face.
Kim fought not to laugh, but failed. "It...it's not that bad, Ron..."
"Yeah, for you! You got wings! And you're not a donkey!"
"Eww, donkey," Rufus' voice said...but there was a piercing, avian sound to it.
"Rufus? Where are you, buddy?" Ron asked.
A shining red and gold phoenix—an actual phoenix—landed on Ron's head.
"Whoa," Kim said. "Rufus? Is that you?"
The phoenix nodded.
Ron groaned. "OH COME ON! SERIOUSLY?!"
The winged unicorn cleared her throat, drawing Kim's attention. "We haven't been introduced yet," she said. "My name is Twilight Sparkle."
"Kim Possible," Kim said. "Donkey-boy over there is my boyfriend Ron, and that phoenix is his pet Rufus."
Sunset tilted her head. "How does a naked pink weasel...thing...turn into a phoenix?"
"How does a dragon turn into a dog?" Twilight replied with a shrug. "I don't know how the portal works or why it does what it does. Anyway..." She looked up at Sonata, who was flying slow laps around the room. "We've got a lot of work to do, so we'd better get started." Her horn glowed, and Ron was lifted to his hooves. His knees wobbled for a moment, but he managed to stay standing. He took a shaky step forward, then let out a hesitant breath. After a moment, he was able to walk.
"This blows," he said.
"Stow the blowage, Ron," Kim said. "Focus on the mission." She looked at Twilight, frowning. "Question, though."
"Okay, the unicorn thing, I get, but why do you have wings?"
Twilight laughed. "I'm an alicorn," she said. "It's...difficult to explain..."
"Twilight's a Princess, and one of the four most powerful ponies in Equestria," the dragon said helpfully.
"Okay, maybe not that difficult," Twilight said. "Thanks, Spike." She shook her head. "Anyway, let's get started. Sonata? Would you mind coming down from there?"
"No thanks, I'm good!" Sonata said.
Twilight frowned. "Let me put that another way." Her horn glowed; with a bright flash, Sonata was yanked out of the air and deposited awkwardly in a chair at the large reading table.
"Ouchies!" Sonata whined.
"Thank you," Twilight said primly, taking a seat at the head of the table. Sunset joined her, sitting at her left.
Kim looked at the chairs awkwardly. "Umm...is it okay if I stand?" she asked. "I'm...not even sure how to sit with this body."
Twilight laughed. "Sure, you and Ron can stand."
Ron fell flat on his face.
"Or not." Twilight rolled her eyes. "Alright...I want to know everything. First, Kim, Ron, I want you to tell me about your world."
"Well, there's not much to tell," Kim said. "We're from Earth, but not the same Earth we just left. There's magic in our world, but it's usually the bad kind of magic, and...well..." She trailed off. "Sorry, I'm just...not really sure what exactly you want to know."
"That's alright," Twilight said gently. She looked at Sonata. "Now...tell me exactly what you did the night these two came to your world. I want every detail." As Sonata took a deep breath, Twilight amended, "Of your attempt to open the portal."
Sonata stopped in mid-inhale. "Okay! Well..."
She rattled off the same account of her failed dimensional travel attempt that Kim, Ron, and Sunset had heard the night before. Only this time, she added a lot more technical details that Kim couldn't follow, about things like ley lines and bizarre mathematical equations and electromagical pulse feedback and a dozen other things that Kim had no frame of reference for.
"And then it zapped my taco and I saw the inside of a Mexican restaurant, and then the whole thing exploded and there they were!" Sonata finished.
Sunset groaned. "Sonata, will you knock it off with the taco already? For the last time, the taco isn't important!"
"Actually, I'm pretty sure the taco caused all this," Twilight said.
Sunset stared at her, jaw agape. "...WHAT?!"
Sonata smirked. "Booyah!"