HERE IT IS. I wrote a sonadow story. Kind of a AU taking place during Generations.
Sonic and Shadow are already together and Sonic has been helping him come out of his shell a bit.
Tiny Sonic is too cute.

It was a rainy day in Station Square. Many people bustled about to escape the cold, hard pelts falling from the dark clouds.

Walking down the sidewalk with an umbrella, was Shadow. A tall, well built hedgehog dark as the night sky and red stripes that stood out like the sunset against a cloudy sky.

He appeared to be uncaring for the newfound wetness that drenched his fur slightly with each step. After his time on Earth, he managed to remember most of his previous life. A memory that stood out was his friend, Maria, speaking fondly of rainfall. He couldn't help but agree that it was peaceful and refreshing. The nature of this planet was beautiful, and it was true that it was far better than the simulations on the ARC.

The icy water soothed his sore muscles from a long week of G.U.N missions. He didn't really like following orders on how to protect, but he did get to protect the plant his friend cherished. That's all that mattered to him. Yet it always seemed they only sended him on missions when everything was already going to hell. That part irritated him to no bounds.

Stifling a yawn, he silently looked forward to the comfort of his "home". A good book and a warm blanket with some tea sounded wonderful.

Curiously, he glanced up to a flash of light. He found a small smile form on his muzzle at the sight. Yet he knew the potential danger of the flash.

Sighing, he shook his head as he continued walking. He couldn't teleport even if he wanted to.

His rival, Sonic, or "faker" as he deemed him. Managed to convince him to let him borrow his emerald. How he did so was still a mystery to the dark hedgehog. Yet apparently the reason had to do with something about saving tiny aliens in space. Wicks, or something. That's what he think Sonic called them.

He shook his head at the memory of that smirking grin.

How he let one hedgehog affect him so was a mystery on itself.

A loud crack of thunder split across the sky, startling the hedgehog enough to make his fur rise in response. He shook his head, muttering to himself. "Stop it.," he said, slightly angry that he allowed to be spooked.

That's when he heard something.

Glancing around, he could've sworn he heard a small scream of fear. Turning, his quills rustled slightly as he gazed down an alleyway.

Walking down the alley, he held no fear from the darkened way. Who would be stupid enough to do so anyway?

Quietly, he watched a cardboard box shake in the cool rain. "Hello?," he called out, seeing the box flinch. What was in there?

Now curious, he went to the box with no second thought. Carefully opening the top. The ruby orbs widened at the sight of a small blue hedgehog shivering in the soaking box. The small ears flicked down as the soft quills rattled in slight fear. Wide, dark eyes looked up at him.

'What?,' he silently inquired. Sighing, he knew he couldn't leave it in the rain. "What are you doing out here little one?," he asked, at least trying to be comforting to the tiny hedgehog.

No answer came. Kneeling down, he tried again. "I won't hurt you little one. I'm just worried is all. Why are you out here? It's rather wet and cold, don't you think?," he said, smiling gently when a small nod came in response. "Do you know where you are?"

A shake of the head.

Great. A lost child.

Another crack of thunder resounded loudly against the sky, lighting splitting against the dark clouds. When the rumbles faded, Shadow was shocked to feel small arms crushing his chest in a death grip.

Glancing at the small child, he made no sound at the shaking form clinging to him.

Sighing again, he carefully slid his arm beneath him to properly hold him.

"Come now. Let's get out of the rain.," he said quietly, the vibrating sound in his chest comforting to the child.

He continued his way to his home, silently noting how damp the child was.

He barely noticed he was on the stoop of his apartment building. Having put all his focus on the shaking child.

Quietly closing his umbrella, he opened the glass door. Shaking his umbrella, the water went flying into the dark outside.

"Do you like hot chocolate?," he asked as he walked to and up the stairway. His eyes met the eyes of the child, who just seemed to be staring at him rather...strangely.

His eyes left him from the awkward moment. "Yes?," he asked.

He didn't like the slightly sparkly look the child gave him. "I'll...take that as a yes...," he said when he finally reached his floor.

He felt the small form shift a bit, a light pink entering his cheeks from the light nuzzle to his neck followed by a purr.

Ok...

Entering the apartment he had, he let the umbrella go to the holder near the door. Ignoring the blanket on his cream couch that was laid about unneatly. "Let's get you dried off first."

Gently, he rested the child on the tub in his bathroom. After much prying, he managed to loosen the death grip. "Relax, I'm right here." He said quietly as he rummaged around for a clean towel.

Settling on a red one, he wrapped it around the child. The fluffy fabric engulfing the boy easily. He could've sworn he heard a small squeak.

"Relax," he said softly as his hands moved in small circles to dry off the now icy fur.

Moving the towel away from the small head, he chuckled at the pouting look in the ball of fluff that he had become. "Sorry," he said, letting the towel flip so the water wouldn't touch. "Get out of your wet clothing, ok? I'll make some hot chocolate." He said as he stood.

Halfway to the kitchen, he heard a soft patter behind him. Turning, he saw the child following him. Looking incredibly worried. Sighing, he bent and scooped him up. "Fine.," he said simply, his tense reaction relaxing at the sight of a rather happy smile.

Encompassed in the towel, Shadow held the boy as he stirred the warming water. Choosing to ignore the small nuzzle and yawn, he let him fall asleep against him. The soft rubies gently glanced over the smaller form, noting the slight sharpness of the blue quills.

'He almost looks like..,' he shoved the thought away. That wouldn't make sense. But given the ridiculousness of his life, it wouldn't surprise him.

That's when he heard a sharp knock at his door, almost in a panicked way. Abandoning the pot, he walked to the door with the child barely stirring.

Glancing out the peephole, he opened the door. "Shad!," a familiar voice said quickly, not wasting anytime trying to enter even when the door wasn't opened much.

Slightly smooshed in the door, Sonic looked panicked.

"I know I told you where I lived for emergencies only, but seriously. You look like you just realized it was raining," the dark hedgehog said with a slight eye roll.

A nervous laugh left him," I need your help." "I'm busy.," he said simply, grunting slightly when the other toppled into the apartment.

"Quiet!," he said in a hushed whisper. A dark brow raised at the shocked expression.

"There you are!," Sonic said in exasperation. Shadow glanced down at the sleeping child.

Oh...

"Explain yourself hedgehog.," he said lowly, his free hand resting on his hip with little amusement.

After agreeing to kick off his muddy shoes and dry off, Sonic explained how the little one came to be.

"So...he's you from the past...," he said with little humor. "I know right?!," Sonic said with a grin.

"Even as a kid I kicked robot butt and ran fast!," he said, his hands going to his hips with a proud smirk," I just grew up to be more awesome with time."

Ruby eyes rolled," Oh yeah. Sure. Mhm. Whatever you say.," he said, sipping his chocolate with a slight smirk at the other's small pout.

"What? I bet if you were a kid the same time I was, we would've been buddies way longer!," he said back, his arms crossing.

"Please, I would've thought," Why is this annoying hedgehog following me still?" ," he said, smirking a bit. "Don't you already say that?"

"I would've said it more," he said back, chuckling a bit at the pout.

"I'm not that annoying...," the cerulean hedgehog pouted," I'm just fun. That's why," he smirked. "iAnd you know how fun I can be Mr. Ultimate Lifeform~/i," he grinned a bit, his tail wagging slightly from the soft purr.

A light pink entered his cheeks," I'm warning you hedgehog," he said, still a bit awkward with outward tellings of affection. Things changed so much in the way of courtships.

The chair scooted over, the smug expression resting on an upturned hand. "What?~" He asked softly.

The ebony hedgehog huffed softly," Not in front of an impressionable child please."

"Ah Shad, come on! He's asleep, I can say sweet things to you if I want!~," he teased softly.

"No, one of us needs to be the responsible one," he said, gently slapping the hand that wanted to wrap around his waist and pull him into a hug.

"Shad! You don't always need to be the one though!~"

"Yes I do when you're the one being so...childish," he said, turning away and ignoring the small huff.

Peach arms found their way around his waist and pulled him backwards into a hug. A warm muzzle gently nuzzled against his neck. "Come on, you know you love me~," he said softly against the dark neck.

A sigh left him," You're either making it hard to be mad or stay mad...but you're still irritating.," he said, smirking a bit.

A loose hand gently cupped the peach cheek, affectionately," But you're my irritating hedgehog."

"You do care!~"

"Don't push it."

A soft rain pattered against the windows, the hedgehogs warm in the affectionate embrace. "...Can I-...," the blue hedgehog trailed off almost meekly.

Shadow sighed, shifting the snoozing child in his arms," I suppose I can't let you get all wet from walking back home."

"Great! I'll sleep-"

"On the couch."

A pout left him," Shadow, I've been in your bed before!"

"True, but there's another person here." He said rather matter of factly. "And I know how clingy you are when you sleep."

"But you know I don't like thunderstorms alone!"

Ebony sighed softly," I suppose I can let you..." his cheeks burned a light red at the peck from his hedgehog.

"Come on" The empty cups were left in the sink as the blue speedster ran to the bedroom.

Much to his disappointment, Shadow made sure the the child was in between them as a measure of guarantee. And each time Sonic tried to move his other self, a dark hand would gently smack them away.
He was left huffing slightly most of the night while the other two occupants of the bed snoozed contently.