I've been binging your x readers the past few days, and they're so well done!! If it's not much trouble, could you do a 2k3 Donnie x GN Reader during the Adventures in Turtlesitting/Good Genes arc? I've been turning the thought of (Y/N) witnessing his transformation and going "Like Hell I'm not gonna do something about this" and doing what they can to make a cure; even standing up to Bishop and Stockman. I'm a sucker for "You helped me, it's the least I could do to help you" stories. >u<
Secondary Mutation (Angst)
2003!Donatello x reader
A/N: Thank you so much! That’s so sweet of you to say💚 This arch goes over three episodes, but I’ve tried cut it down and make it more precise, making the main focus the showdown and all that at Area 51. Hope you enjoy💜
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Warning: Spelling (was a little tired towards the ending. Long day😅), Donnie with a secondary mutation, Bishop and Stockman being assholes, a little hostage situation like?
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You were there when it happened. You witnessed the whole thing as it unfolded. Leonardo, Raphael and Michelangelo and dropped you and a sick Donatello off at April’s place. It had been Leo’s idea, citing it would be good to keep both of you out of the sewers, while he and the other’s went on a hunt for Bishop’s mutants. You too thought it was a good idea, except it meant crashing April and Casey’s long awaited date night.
It had started out great. Or as great as it could. Your boyfriend was continuously sneezing and sniffling, bags running under his eyes, and shaking even when covered by several blankets. The poor guy was going through it.
But then the black out happened, leaving all of New York City in darkness. That was the last thing you needed, sitting with your shivering boyfriend’s head in your lap, trying to sooth him with your fingers tracing across his head. But nothing helped. Donnie felt horrible, and the darkness only made it worse for him.
As Casey went to look for a flashlight, Donnie started groaning out in pain, complaining that the cut on his leg was beginning to act up. He said it felt like it was burning, causing you even more worry than before. April wanted to help, but with her own boyfriend knocking things over in her room, as he looked for the flashlight, she had to leave to make sure he didn’t bring the whole apartment down over the shop. But that was when the trouble began.
Donnie groaning almost turned to screaming, his thigh convulsing. You were terrified, asking him if he was okay, begging him for an answer, but Donnie could not speak. The pain was too much for him. Then suddenly he let out an ear piercing scream, his thigh doubling in size. He sat up, hugging onto his legs, screaming and shaking as sweat ran down his face. His body started to grow, his belt, elbow pads and knee pads ribbing before he hurried up from the sofa, as if he frantically tried to find a solution on his own.
“Donnie?”, you asked terrified, trying to find him in the dark, grabbing your phone in your pocket.
“(Y/N)”, you heard Donnie’s strained voice call out from the corner of the room. You quickly turned on your phone's flashlight, pointing it in his direction. There he stood, double in size, red eyes, sweat dripping down his face with an expression of pain. “Help me”.
“Don?”, you asked in confusion, stepping closer to him. “What’s happening?”
“No!”, he exclaimed, just as April and Casey came back into the living room. “Stay back!”
“Don!”, they called out.
“No!”, Donnie yelled, before pushing past all of you, making a b-line directly for the door, breaking it off the hinges before he ran downstairs. “Get away from me!”
The next few hours were horrible. Finding Donnie had turned into a giant alligator-like creature in the basement, before you and your friends had to defend yourselves against your boyfriend. Casey even had to go as far as mashing him over the head with a vacuum. It was even more horrible knowing he had run off into the sewers, leaving you scared and worried while the guys looked for him.
All of this led you up to this point, you and your best friends seeking out Agent Bishop in order to find a cure for your horribly inflicted boyfriend. Seeing Donnie like this broke your heart. Tears rolled down your face as you watched him unconsciously float around in the round glass bubble. Somehow this was even worse than having watched him slam against the glass or the other containment unit, roaring like a wild beast, trying to claw at whatever he saw outside the glass. Even you. You almost broke down when he snapped against the glass, wanting to bite you.
You paced around Bishop’s lab, unable to sit still. Because if you sat down you would stare, and if you stare you would cry. And you did not want to cry, you wanted to act. You wanted to do something. You couldn’t just sit around and wait for his brothers to get whatever Bishop had asked of them. Especially not when Leatherhead and Splinter kept reading Donnie’s vitals, giving each other sad looks. You knew what they were saying. You could not hear it, but you knew it. Donnie’s time was running out. His second mutation was breaking down his body. And there was nothing you could do but wait. And you hated it. You felt like you were going mad. Time was ticking and you could do nothing but watch, feeling the need to scream and cry.
“Doctor Stockman”, Splinter said, turning to the walking brain on a stick that had been testing your patience ever since you got to Area 51. “Agent Bishop told us that you would administer the cure to Donatello”.
“To think that I’ve sunk so low”, Stockman spoke to no one but himself, testing out different liquids on a creature in a different bubble. “That my unparalleled genius, would be used to save the life of one of these freaks”. You bite the inside of your cheek, holding from the temptation of smashing the glass that harbored Stockman’s brain. "Unfathomable".
“Where’s the cure, Stockman?”, Leatherhead asked, doing his best to keep his tone civil. But Stockman ignored him, moving from one console to another, still talking to himself as he went.
“I’m pulled from sweet oblivion, for what?! This?!”
Getting tired of Stockman’s rambling, Leatherhead grabbed onto the walking stick, forcing him to face him. “Show us the cure, now!”
“Cure?”, Stockman asked. “You stupid animal! Agent Bishop lied. There is no cure”.
“What?!”, Splinter exclaimed, his eyes wide. You felt your own body going pale, stopping dead in your tracks. For a moment you stopped breathing. Leatherhead growled, anger bobbling inside of him.
“You inhuman, soulless, monster!”, Leatherhead yelled, slamming Stockman against the keyboard, before getting ready to punch the glass head himself.
“Leatherhead, please”, Splinter called out, putting a hand on the mutant’s shoulder. “I share your anger, but this will not help Donatello! We need solutions not vengeance”.
“According to me, that piece of gum needs a good chewing!”, you yelled, pointing at Stockman.
“You too, (Y/N)”, Splinter said. “Please, my child. For Donatello”.
“You’ll be wise to listen to your inlaw”, Bishop’s voice sounded as he walked into the lab. Leatherhead growled and you felt your fists tightened at the sight of his smug smile. Both you and Leatherhead started seeing red, your anger so great that not even Splinter could hold you back.
“I’ve waited a long time to do this”, Leatherhead said before grabbing Stockman by the metal throat. “Now you’ll know the meaning of pain!” He threw the lump of metal onto the ground, before making his way to the well dressed man. You wasted no time stomping your foot onto Stockman’s back, making him lay flat against the floor.
“Doctor Stockman is working on a cure”, Bishop calmly said. “He’s the best change Donatello has for survival”. You sucked a breath in, staring directly into Stockman’s lone eye. Leatherhead fought the urge not to jump on Bishop. “Harm me, and Stockman stops. And your friend has no chance!”
You reluctantly let Stockman go, just as Leatherhead decided to back away from Agent Bishop.
“Fine, for now villain”, the large mutant said, before turning to the robot human hybrid that had just managed to get off the floor. “Doctor Stockman, show me what you have so far”.
The scientist sighed, before moving to the console with Leatherhead and Master Splinter. You however went straight over to Bishop, anger still fuming off of you. “This better work, Bishop”, you growled. “Or else you’ll personally have to deal with me”.
Agent Bishop faked a kind smile. “Your care for your friends is admirable, Miss (L/N), especially your care for Donatello. Although, I’m right to assume that your care for the turtle goes above just that of friendships?”
“How I care for my friends is none of your business”, you calmly said, keeping your anger in check. “What is your business, is making sure Stockman succeeds”.
“If you say so, Miss. (L/N)”, Bishop said, before walking away, leaving you back alone in your anger and sadness. How you wished you could be hugging Donnie, just one more time.
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Leatherhead and Stockman made great progress on the cure, with the first test subject being a success. Who would ever have thought that you would be happy with Stockman’s work, even if it actually had been Leatherhead that had done the most out of the two? But all that slight happiness disappeared the moment the Bishop opened his mouth.
“Impressive, Mr. Leatherhead”, he said, pushing his glasses further up the bridge of his nose. “And to think, I was going to dissect you”. Leatherhead growled. “What a waste that would have been. You’re even more brilliant than Doctor Stockman!”
“That doesn’t take much”, you mumbled, Splinter lifting a finger, telling you to behave. For the sake of Donnie.
“What?!”, Stockman questioned, not believing what Bishop had said.
“Then, it works?”, Splinter asked, watching as the test subject turned human again.
“Doctor, prepare an airborne version of the cure for the New York outbreak. As well as a sample for Donatello”, Bishop said, turning directly towards you and Splinter. “If his brothers fulfill their side of the agreement”.
“Don’t worry, Bishop”, you said, engaging in a stare down with the agent. “They will”.
“Brave of you to trust the life of your sweetheart with his brothers”, Bishop said. “Or maybe even foolish”.
“We trust them”, was the last thing you got to say, before there was news on a returning base helicopter. You sighed a breath of relief. They were back.
You went up to the main entrance, meeting the brothers as they came in. Bishop did not greet them, instead demanding that they handed over the item he was wanting. They looked to Master Splinter, waiting for his confirmation, before Mikey handed the stone over. The moment the stone was in Bishop’s hand, the alarm sounded, red lights shining all over the base.
“Base destruct sequence initiated”, sounded the alarm over your heads, making your ears ring.
“This base has been compromised by your presence”, Bishop said. “You have 15 minutes to collect your brother, and vacate the premises”. Then Bishop turned, smiling over his shoulder before he left. “Pleasure doing business with you”. You felt your fist clench.
It took you less than a minute to find Leatherhead. He was already working the cure on Donnie, leaving you all anxious in anticipation. Fog built up inside the machine, before the door finally opened, letting out a dazed and confused Donnie, rubbing his eyes as he took in his surroundings.
“Hey, guys”, he said tiredly. “What’s up?”
“Donnie!”, you yelled, running to him, throwing your arms around him before bringing him into a thigh hug. He wobbled slightly, leaning his weight on you as he found his footing.
“Hey, babe”, he smiled, still a little confused. “What’s going on? Where are we?”
“That’s a story for a different time”, Leo said. “Now we gotta go before this place blows up!”
He didn’t have to say that twice. Quickly you all ran outside, finding the chopper before taking off. You just managed to get up high enough, before the base blew up, sending red, orange and yellow light across the sky.
You all breathed a sigh of relief, happy to have Donnie back, safe and sound.
“Welcome back, my son”, Splinter said, taking a hold of Donnie’s hand.
“Thanks Sensei”, he smiled, still a little tired. “But I hope you guys didn’t go through too much trouble for me”.
The reaction on everybody’s faces spoke volumes. None of you had the guts to tell him, and neither should you.
You took Donnie’s hand in yours, smiling at him. “For you, nothing’s too much trouble”, you said, placing a kiss on his cheek. Donnie blushed slightly, not sure how to react in front of his family. But in all honesty, it did not matter much to him at the moment. He was just happy to be back to normal, feeling your hand in his once more.












