A/N: A rule 63 fic. Yes, I love genderbends. This will just be a story I'll work on as ideas come, so no fixed date or anything, no precise planning. It's just for my leisure.

Summary: Last thing Sonic the Hedgehog remembered was fighting her arch nemesis, Doctor Ivana Robotnik, "Eggma'am." Her now genderbent friends have informed her that she was warped to Mobius Prime. One question, if she's in the prime world...then where is prime Sonic?

Pairings: This will mainly be eventual Sonadow (transcending all genders, so m/f, f/f, m/m. Their love has no limits, I believe if you truly ship something then you ship it in all forms). There will also be other minor Sonic ships, since I see her as someone who likes to tease others just because it's fun to do so.

Takes place after Generations. I never finished Lost World so let's pretend it never happened for this story's sake, okay?

Rating: T, may or may not go up.

Disclaimer: I don't own characters or anything. Only the time I put into this story.

Prologue

The underground base was massive, with a series of mazes that proved to be quite the challenge. Sonic was honestly impressed with the labyrinth, especially after fighting several large robots with names like the Egg Minotaur or Egg Chimera. The whole theme of mythology was very interesting, very different from all the other times she raided Eggma'am's lair. It seemed that the Doctor had done a bit of reading as of late.

She ran her hand along the wall as she sped through the dark corridors. The only source of light was from the torches along the wall, giving it that ancient vibe. It amused the blue hedgehog that the Doctor put so much effort into designing such a place, especially when it would all be destroyed sometime soon. The culprit being none other than herself, the teenager thought with a grin.

She glanced over her shoulder to the younger Mobian running close behind her, blue eyes narrowed in determination as they flickered consistently between her watch and the path ahead of her.

"It should be close, we're almost there!"

The hedgehog nodded, a grin growing on her face. She could see the exit before her.

They came to a screeching halt as they approached the door, skidding along the ground and timing it perfectly enough that they stopped right before making impact with the hard surface. Sonic beamed as she turned to her little sister, who immediately began hacking into the security system. It took skill to have perfected speed like she had.

The door rose into the ceiling, revealing a dark room. They entered, and the lights turned on as they walked in.

A maniacal laugh echoed throughout the room, directing the two Mobians attention towards the center, where the evil doctor stood defiantly. Tall, with weight-gathered around her midsection, she raised her head confidently. Her spectacles glinted against the light, concealing the trickery hidden in her eyes. She elegantly brushed her short, greying auburn hair behind her ear. A sneer marred her middle-aged face.

"Ivana, we all know this'll end. C'mon, give it up already!" Sonic teased, hands on her hip while her emerald eyes twinkled in amusement.

Eggma'am scowled at the way the blue hedgehog addressed her so familiarly. Of course, it was a common occurrence between them, but that didn't mean she approved of it. She quickly got over her annoyance as her lip twitched into a devilish grin. "Sonic, my dear, why would I ever give up when this time I know I'll destroy you?" Her voice was sickly sweet.

The teen giggled. "Yeah, right!"

"Sonic!" She turned to face her younger sister, who sent her a worried look. "My watch, it's sensing a lot of Chaos Energy in this place...I have a really bad feeling about this."

Sonic winked at the fox. "It'll be fine! It always is!"

Tails bit her lip unsurely before glancing at Eggma'am.

"Perhaps you should listen to your friend, Sonic." The Doctor said before the ground beneath her raised, revealing a large robot with a single red eye in the center of its forehead, its body made from refined metal, though Sonic took note of the many wires along the wall that attached themselves to the mechanism. "You will soon find out that heeding advice could've prevented your demise." She said as a seat and control board emerged from the platform she stood on before it settled itself into the machines cranium and encased itself in glass. "Egg Cyclops, destroy them!"

Sonic grinned cockily as she got into a defensive stance, watching as Eggma'am sat herself comfortably and began typing away at the control panel. She cracked her knuckles, her emerald irises following every wire strategically so she could move quickly and trap the beast.

Eggma'am pulled down a lever that would empower the robot with the power of two Chaos Emeralds she currently held in another part of her base. She had been meaning to try out her newest experiment after some time, and this seemed to be the perfect opportunity. The alarms blasted all around the room and her face contorted into an expression of horror. "What?" Her eyes darted to each holographic error message that appeared before her and instinctively she began typing furiously into her control panel. "This can't be!"

Sonic raised an eye ridge. "What do you mean, Ivana?" She exchanged a glance with Tails. "Is everything alright?"

"Blast it! My machine! The Emeralds have become unstable after having contact with the experiment! They are tearing through time and space as we speak!"

Tails looked up and froze, pupils contracting as she managed to unsteadily point at the portal above her. "Sonic! Look! We have to get out of here!"

The blue hedgehog tensed at the sight before narrowing her eyes at the doctor. "Eggma'am, shut off your machine!" She yelled. "We don't need you messing around with time again! Don't you know what originality is? Find a new plan for destruction!"

"What do you think I'm trying to do?" The middle-aged woman snapped at her.

"Wait, this wasn't part of your plan?" Sonic asked with eyes widening as huge gusts of wind began to pick up, her quills flailing as her feet began sliding along the ground.

"Of course not!" Eggma'am huffed as she continued to work at the controls. "I'm trying to override the system and shut it off, so if you could please just shut up and let me-"

"How in the world are you just going to start something that's incomplete? Ivana, you know better!"

"Shut up, don't call me that!"

"S-Sonic!" Tails squeaked as the winds began lifting her off the ground. "Help!"

The blue hedgehog turned and grabbed her little sister by the wrist, using her other arm to shield her face from the stinging wind. "I...I got you, don't worry!"

"D-don't let go, okay?" The eight-year-old whimpered as Sonic used her strength to pull the lighter Mobian toward the ground.

"I'd nev-Ah!" She hissed in pain as a piece of scrap metal hit her in the arm holding the the young fox, causing her to let go.

"Sonic!" Tails screamed as tears poured from her eyes and the winds carried her toward the portal.

"Hold on to something unless you want to be sent who-knows-where!" Eggma'am advised her. "The portal will deactivate in just a few seconds!"

Sonic looked up for her little sister, feeling the wind lift her up as well. Her eyes quickly scanned the area until she saw yellow.

She acted on impulse the moment she saw a piece of scrap metal skid along the ground towards her. She hopped on just as it lifted into the air and swirled around the room before jumping onto another piece above her. She spin-dashed in place until she released at angle that sent her flying to Tails. As she soared through the air and got closer to the fox, she got out of her ball form and extended her arm.

"Tails! I'm here!" She yelled.

The fox, who had covered her eyes in fear, removed her hands and stared at her hero with teary relief. "Sonic!" She cried as she reached for her big sister's hand.

Sonic had a determined look on her face as her fingertips grazed Tails' palm before moving forward so she could grab the other's wrist firmly. She sent the kit a small smirk and glanced into blue eyes softly. Tails could only blink in surprise before feeling Sonic use all of her force to twist their bodies around and let go at just the right moment for her to be sent back to the ground, pushing against all winds that would otherwise raise her, while the blue hero accelerated through the portal and disappeared from view.

Before Tails could scream her name, the portal closed.

The winds stopped abruptly, any scraps or debris that had been picked up by the wind fell with a loud crash. The young fox fell to her knees in defeat, completely shocked, her body trembled as a wave of emotion threatened to consume her. She hugged herself to keep her sobs contained, as Sonic wouldn't have wanted her to cry.

"Of course, not only does my machine shut down completely, but all signs of Chaos Energy disappear! How embarrassing, now Sonic will never live it down!" Eggma'am vented as her fists hit the control panel. "...Wait, my experiment! Is it still here? I can't detect it!"

Tails squeezed herself tighter at the mention of her big sister, her eyes clenched shut to avoid having to face reality. Sonic was gone, she was somewhere, but she had no idea where. She could hear the Doctor get off her deactivated Cyclops and stride past her, the sound of the door opening and closing her was enough to let her know that she was alone.

Unable to hold it in any longer, she felt a few tears drop down her cheeks. She opened her eyes only to find her vision blurry, and instinctively she wiped the tears away with her arm. She was a big girl now, she had to get it together and find out where Sonic went off to. It was all up to her, and she was wasting time sitting there crying. Her big sister needed her, she had to get moving.

She shakily got up and continued to attempt to clear her eyes of stay tears, surveying the room for any clues before taking a step towards the exit.

Just as her foot planted firmly on the ground, she noticed cobalt near a heap of scrap metal on the other end of the lab.

A/N: I imagine Eggma'am sometimes somewhat being like Dolores Umbridge from Harry Potter, but not as terrible. She just sometimes does that sweet voice thing as well as cares about maintaining a professional appearance, though Sonic's informal way of speaking towards her completely shatters that image.

Where'd Sonic go, oh no. Who on Earth did Tails find, gasp. I'm terrible at being dramatic so just ignore me, okay? Next chapter, we go to this 'other world' that I mentioned in the summary.

Feel free to give out ideas, input, or whatever because there's no set plan for this story. No OCs though, I don't like to deviate from canon. Feel free to critique this as you please, I'm sure there's mistakes because I whipped this out while I was bored out of my mind. I also have a habit of dozing off while I write and edit so...yeah. Ciao~