Okay time for another story! Again it is Sonic, but this time it is not a crappy GCSE story, it is a Story Trade I did with my friend on DeviantART. Supposed to be a one-shot, but I got carried away, so now it is a five-shot, if that makes sense! My OC Carlie the Cat from the previous story is here as well, but its a different kettle of fish with this one. She is now working for GUN and not the Freedom Fighters, and I think there is a better description of her somewhere :) Anyway, have fun reading and please let me know what you think :D

Oh yeah the disclaimer, I'm only gonna do this once! Carlie the Cat belongs to me and so does the story, but all other characters belong to SEGA. There done.

The Green Hill Zone. Some would say it was a sacred place, others the embodiment of peace. The sun was always shining, the children were always laughing and the breeze played around with the freshly bloomed flowers. The various flora and fauna admired by all who travelled though this wondrous Zone; though many zones and places on Mobius none were as tranquil as the lush ground that spread across this land. That was until about five minutes ago.

Now it was anything but peaceful as the beautiful grass was tarnished by the slick oil that leaked its way out of the cold, harsh machinery set in its heart. The animals cowered in fear as a tall, human figure graced them with his presence, an evil cackle spilling from his mouth. The bunnies and flickeys fleeing for their lives as the memories of past experiences filled their hearts. One was not so fortunate. The figure grabbed a bunny by his cotton-tail and brought him up to his face, adjusting his oval glasses to get a better look.

"Well, well little one, judging by the way your trembling I should assume that you know what's coming," he said, to which the poor creature could do nothing but curl himself up. The figure chuckled, strolling casually to his machine, gazing at the image of his face on the side.

"The machine is ready Dr Eggman," the metallic voice of one of his robot henchman confirmed, as the doctor himself place the little animal inside the container.

"Excellent, but we need to round up a few more first,"

"As you wish,"

As more of the robots began their search for more of the animals that had scampered off only moments ago, the wind picked up, the trees and flowers swaying more rapidly than before. Eggman smiled as he turned around to the cliff he knew was behind him. Standing atop was the one person he knew would come; the one he wished wouldn't, but had come to terms with the fact that he always showed up. The sun had not long risen and was situated perfectly behind the blue hedgehog. The wind he created blowing through his spines as soft, emerald green eyes stared down at the doctor.

"Ah Sonic, long time no see,"

"C'mon Doc, surely you aren't trying the same old thing again?" a smirk crossing his muzzle,

"If at first you don't succeed," the doctor started,

Sonic raised his eyebrow and rolled his eyes at the statement, not needing him to finish what he started, but the smirk adorned on his face never ceased.

"If you think I wasn't prepared for your little arrival then think again,"

"Then I guess it's good that I didn't come alone,"

Now it was Eggman's turn to raise a brow, in confusion. Sonic signalled down with his eyes and Eggman followed his gaze. He found himself staring into the darkness that lingered around the face of the cliff. There stood the dark counterpart of his nemesis. His red eyes piercing through Eggman as he remembered the fear this hedgehog struck into so many people. Fortunately Eggman was not one of them, at least not that he had admitted. Stalking out of the shadows and into the dim light that hit the ground below him, the dark hedgehog sneered at the doctor.

"Your back-up I presume?" Eggman asked, gesturing with his hand, to which the hedgehog's eyes only narrowed further. "

"Shadow, how nice to see you,"

Sonic listened as he heard Shadow scoff at Eggman, silently chuckling at his friend's lack of communication skills.

Without warning a laser beam came shooting towards the cliff edge, Sonic jumping away effortlessly as he landed gracefully next to Shadow. As if a cue by his lighter counterpart and just as quick, Shadow darted forwards and took out the robot that fired, destroying both the gun and its owner in a matter of seconds before returning to his place in front of Eggman.

Caught off guard, but not at all surprised, Eggman snapped his index finger and thumb together, indicating to the rest of his army that they were needed to attack. The robots started their charge, as the two hedgehog rivals stood, poised to counter the impending attack. Quicker than the eye could see, the fighting partners pounced on the incoming metallic fiends. A dark blur taking out all the soldiers, blue blur catching and comforting the tiny creatures that they rescued. Sonic looked at the container unit, taking only a moment to consider how many animals would be in there, before leaping forward with his trade-mark Sonic Spin and pressing down hard on the button atop.

Shadow was taking down Eggman's little pawns without breaking a sweat. Eggman looked around to find that all parts of his plan were being foiled. The container unit was broken and everyone inside released and his henchmen were getting vaporised. It was here that he decided to do what he usually did, make a hasty get away. Or as Sonic called it, running away scared.

Sonic freed the remaining animals and took them a safe distance away from the wreckage site, returning to help Shadow dispatch the rest of the robots. He came back just as Shadow threw one of the bots into the remaining two, causing an explosion to erupt. Sonic ducked behind a rock during the initial force and gazed back out to see Shadow emerging from the smoke. Eyeing the wreckage that had been left behind, Sonic contacted his best buddy Tails, who was living nearby, to ask him to take care of the robot parts. Shadow watched silently as Sonic did this, rolling his eyes when he heard an excited squeal when Sonic told Tails that he could have the robot parts.

"Have you quite finished faker?" he asked, annoyance blatant to his lighter counterpart.

"Sure, we can head back to headquarters,"

Sonic took off ahead of Shadow, knowing that his rival would understand his invitation to a speed race. Shadow chuckled slightly, a smirk on his face, racing off to catch-up, the speed of the pair caused the trees to dance a little more violently than they would like.

GUN, a federal organisation, was their destination. Shadow was a member, having been so since he left Eggman a few years prior. For Sonic the days were slow, so when he got a call asking for some back-up for a few days he jumped at the chance. The commander was waiting for them outside, anticipating good news from the two.

They skidded to a halt just in front of him, Sonic finishing slightly ahead of Shadow. The commander listened as Sonic started to tease Shadow about losing his edge, the black hedgehog retaliating that Sonic had a head-start and that he had expelled more energy in their fight. A stern clearing of a throat brought the two out of their little 'fight' and attention on the superior in front of them.

The commander brought Shadow aside, asking the usual questions; how did it turn out, what happened, what damages were made? He answered the questions presented to him, stating that he would get a full report by the end of the day, and re-joined Sonic.

"So, what the commander want?" Sonic asked, hanging off a tree branch,

"What he always wants after a mission," came the reply, accompanied by a trade-mark scowl. He heard a chuckle emanate from the tree as the owner leapt down. Shadow rolled his eyes, he was responsible for the overenthusiastic hedgehog while he was there. It wasn't that he wasn't trusted, but he was known to not fully understand some of the more complex machinery that he came across, Tails vouching for this. But keeping the hedgehog wrangled was hard, and a mission that Shadow did not like. Zoning out was the only thing he could do to stop from hitting his counterpart, all the positivity and spirit was too much for Shadow to bear.

He finally started to pay attention when he felt a hand rest atop his shoulder.

"Shadow," he heard being said. Turning to face the voice he saw the look on Sonic's face, his emerald eyes brimming with a look of concern and worry.

"Your hurt," Sonic finished, gesturing to a deep cut that went unnoticed earlier on Shadow's side. It wasn't bleeding heavily, but still looked pretty nasty, Sonic knew that if it wasn't patched up it could get infected, but convincing Shadow to seek medical treatment wasn't easy.

"It's nothing,"

Sonic frowned, "I've seen nothing, that is not nothing," Shadow scowled at him,

"You want to be taken off active duty?"

Without answering Shadow stood up, glared one more time and stared to make his way to the Medical wing, Sonic not far behind.

GUN was a big place and had many people enlisted, the dangerous missions often needed the assistance of medical personnel. The medical wing consisted of many parts; a few hospital rooms where patients rested, each large room with about six or seven beds in, a storage room full of supplies and an office for the person in charge. Upon entering the office the two hedgehogs came face to face with the girl in charge. A sixteen-year-old black and white cat, who was a medical genius. Her mother was known for her healing wonders, the ability she passed down to her devoted daughter. She had a sleek build with chocolate brown eyes, carefully dressed in a pristine white dress that reached her ankles.

"Hey guys, what can I do for you?" she asked, a caring, American accent rich in her voice, Shadow was still scowling so Sonic decided to speak up for him,

"Shadow got hurt earlier,"

"Ah I see," Carlie noticed the cut on Shadow's side. She went over to her cabinet and got out some fresh cloth and a bottle of clear liquid. "Please sit," nodding at the bed nearest to Shadow. He obliged, albeit reluctantly and Sonic sat on one opposite him. Carlie pressed the cloth against the bottle opening and tipped it so the clear liquid spilled out onto the cloth.

"This will sting a little," she warned, before pressing the cloth over the cut. Shadow flinched, grimacing slightly at the pain. Sonic saw he was trying to hide it, but he knew how much that liquid could sting, having to have it applied to wounds he'd sustained a few times. He met Shadow's eyes and gave a sympathetic look with a small smile, which Shadow acknowledged and seemed to appreciate. Carlie was as gentle as she could be; her touch was soft and caring. One hand pressed to the wound and the other stroking his opposite shoulder. She dabbed at the cut with the cloth and then put it on the bedside table. Sonic got up and went to the cabinet to get a bandage for Carlie, giving it to her to wrap around Shadow's middle. After tying it off at the end she went over to her desk to get something, while Sonic helped Shadow off the bed. She took out a small bottle with some pills in and handed them to Shadow,

"Take two ever few hours to help with the pain,"

Shadow nodded and went to the door. Carlie couldn't help but chuckle as she watched him leave; Sonic gave her a warm smile to compensate the lack of thanks from his friend.

Shaking her head and picking up the cloth she used to clean up the cut, Carlie went to her office. The cloth had a bit of blood on it and since Shadow hadn't been entered into the DNA database, Carlie thought it was about time he was.

She soon left, thinking she'd entered it, to sort out some more patients that had been recently submitted, not realising that she had pressed the search button on the database rather than the enter.

She returned to it a few hours later after hearing the incessant beeping noise that came from her computer. She gazed at the screen, eyes wide and mouth gaped. Never realising that instead of submitting the blood to the database, she ran it through it, trying to find a match against the files currently on there. When she realised this she just assumed that there would be no match, after all he wasn't on the system, at least not to her knowledge. But upon returning to the computer she found that it wasn't a No Match beep. It was a partial match beep.

Carlie was stunned for words, how on earth could there be a partial match to Shadow. To their knowledge Shadow was artificially made by Eggman's grandfather Gerald Robotnik, using the alien Black Doom's blood. Unless someone from the present day had somehow magically been born fifty years ago, it just wasn't feasible. Yet somehow this was the reading she was getting.

'There must be something wrong with the system again' she thought, but upon running a diagnostic she found that there was nothing with her system, or any system in the building for that matter. She may have been a medical officer, but that didn't mean she knew nothing about the computers she had control over.

Eventually she found the courage to click on the button that would pull up the file of the person who apparently had a partial match to her hedgehog friend. The file was pulled and she found herself face to face with that person. Person being the relative word, in fact it wasn't one of their human agents, or any human personnel. For that she was thankful, it just would have been too weird. No their database had the files of many animals in their domain, including some from around the planet. Animals who they knew would be useful to have on their systems for whatever reason. This particular animal was not on their database for anything bad, on the contrary, this animal was an extremely good asset to their planet. That animal was a hedgehog.

Carlie had to look twice before it finally settled in. It shouldn't have shocked her. After all, when Shadow first arrived it took everyone the better part of a few months before they could successfully figure out who was who. But it did. It shocked her. And she didn't know what to do. Sure she was close to Shadow, close than the majority of the people at the GUN headquarters. She could tell him right?

But how could she? How could she tell him something that was supposed to be impossible? And how would she bring the other party into the equation? The answer; she would have to tell them both at the same time. She also had to let the commander know, but he was not her priority. Right now she had to find the dark hedgehog to tell him the news, along with his lighter counterpart, both of whom she knew would not take this lightly.

And Chapter ends here, yeah I love doing this :D Sooo I haven't actually stated anything specific yet, but I'm sure ya'll can figure out what is happening here, don't take Tails to do it right? :D