Chapter 1: Mutagen and turtles aren't good parings

Based on 2012 turtles, set after April's dad was mutated.

Author's note: Hi, your dear author here! So I am new to and I have read a bunch of awesome fanfics then I got real interested in it and- Welp, here am I! This is my first fanfiction and english isn't my first language so please be kind!

"Donnieeeeee!'' Donnie flinch as he heard his name was called. Groaning, he carefully put down the beaker he was holding. 'Great, just great.' He thought.

" What do you want, Mikey? I'm working on an extremely important project and if it isn't anything important I do not wish to be disturb.'' Donnie ended with a dramatic cough.

"I was bored, soooo..." Michelangelo look up at his older brother with the mischievous eyes of his.

Donnie sighed. "Look, Mikey. I'm sorry, but I am working on a very very IMPORTANT project right now. Maybe next time...?"

He take a look at his brother and immediately regret it. Mikey has his watery baby blue eyes who look sad, very very sad and Donnie hate it when his only little brother's sad, but now is really not the time.

"Fine." Mikey said. "What're you workin' on anyway?" He ask curiously. Curiousity has always been his biggest weakness, which often led to trouble. Like one time when they were tots, and Master Splinter told them about the outside world. He begin to wonder about what would it be like in the outside all day long.

Then finally his curiousity got the best of him and he planned and waited for his chance. One night when the tots were playing turtle tag, Mikey saw his oppunity. He fake falling down and claimed his stomach was in pain.

Fortunely, the ninja master leave him to bed and did not question further.

Later that night, he quietly sneak outside the lair. He was amuzed by all those tunnels and rats, which was new to him. After god knows how many hours later, he found himself lost. Panic begin to rise in his chest as he desperately scream for help.

" Ma- master Spli- splinter? Donnie? R-raphie? Leo? G-guys? Hello?" Tears threatened to spill as he knew he was lost, all alone in this huge, dark sewer.

After several hours, he was found thankfully which he learned to never ever leave the lair and go into the sewers alone again. That didn't go for Raph thought.

" As you know, I was making to retro-mutagen to turn April's dad to turn back to normal and the same goes to those who was mutated too." Donnie replied in a robot tune like he had practice over and over before.

"Oooh, that?" Mikey sayed as he reach out his hand-

" Mikey, no!" Donnie watched in horror, but it was too late.

Donnie's elbow knocked down the beaker and gasp as the liquid pore all over Mikey. He's eyes were as big as plates.

A terrified scream can be heard all over the lair.

"Shit-" A fist connected with the jaw causing the owner to step backwards a few steps.

"Language, Raph." Leo scolded as Raph pounce on him which he swiftly dodged away.

" Oh, you want language? Let me show you la-"

"AAAAHHHHHHHHH!"

"Ok, maybe later." Raph quickly said after he regained his senses. "Hey, fearless, ya' need 100 years to recover or come check it out?" He mocked.

Leo quickly recovered and immediately darted out from his feet and follow Raph to the source of the scream.

"-Holy shit."

" What's all the commotion 'bout, braniac- Holy shit." Two eyes turned from Mikey and locked on dark brown eyes.

Standing there, who should be the little brother they know was a little red eared slider who was only as big as a palm.

"It worked?" Donnie muttered which earned him a suspicious look from his older brothers. "I mean- uh oh."

"Is that M-mikey?" After what looks like ten minutes of silence Leo finally speak up. "Y-yes..." Donnie said, his hands trembling as he reach out for his only little brother. "Oh god, I'm so sorry Mike, oh god oh god oh god-"

Donnie flinch as he felt Leo's hand rested on his shoulder. "It's ok Don, why not you tell us what happen so it'll be easier?" "O-ok.."

"Hey, why're you giving me him?" Raph huffed. "Well, consider you have take care of turtles before,(spike) and with good care..." Donnie explain nervously. "Umm.. opps?"

"Whatever, fine." Raph huffed as he gave in. The little terrapin shrunked back in fear, or perhaps, instict.

"Great, now I'm babysiting a turtle..." He mumbled in his breathe. Its not loud, but still loud enough for Mikey to hear.

"S-so...I was working on the retro -mutagen...Then Mikey came...H-he want to touch that, so I reach out to stop him..." He gulped as tears gathered in the corner of his eyes. Leo make a hand signal,encouraging him to countinue.

"T-then, My e-elbow... I-it dropped! A-and it splilled on Mikey...OhgodohgodmikeyI'mso so-" His sentence was cut off as Leo spoke.

"Donnie," His voice was surprisingly calm. "I need you to know, its not you fault. Its an accident. Blaming yourself won't help curing Mikey."

"Yeah, fearless' right. No one can predict the future. So save your sorry ass or I'll knock some sense in ya'!" Raph butted in.

"Besides, Mikey wouldn't want it, right buddy?" Baby blue eyes met teary dark brown's. The smaller terrapin blinked its eyes and do a slow motion nod. 'Don, it's not ya' fault.'

"So, Don, can ya' fix em'? We can just mutate him back to normal again." Raph sujested.

Don went silent for a moment, Mikey could almost see a 'loading' on his brilliant brother's head.

"I dont't know, I don't want to have side effects on Mikey. I still need to run some tests and-" "Ok, we get it. Leave the job to the scientist, right? We don't need to hear you blabbering science geek the whole day." Raph interrupted rudely.

"Tha-that's not!" Donnie growled. "Ok, enough, both of you." Leo interrupted and saved the chance of world war 3 happening.

"I'll inform Splinter first, you two..." Leo glare at both of his younger brother. "Please, behave while I'm gone." And with that he's gone.

Author's note: So, what do you guys think? Please review! Flames will be used to warm my toes.

I have two pet RES at home, while I couldn't firgure out their species, I thought of them. :)