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TMNT: Scientific Interference(Version 2.0) by StarrBerryOddity
Fandoms: Teenage Mutant Ninja Turtles (TV 2003), Teenage Mutant Ninja Turtles - All Media Types
22 Aug 2025
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Summary
We’ve all heard of tmnt separated aus. From one turtle to all being separated,it’s not an uncommon trope nowadays.
But,has anyone ever thought of what would happen if one turtle,from a rather underrated iteration,was separated from his brothers and raised in the hands of a rather underrated villain?
Welcome to TMNT: Scientific Interference! A 2003 separated Au that features fluff,family drama and a somehow even more angsty Leo! Please enjoy,and thank you for reading : ]
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The Sheer Will of One's Heart by pandaluna
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Aug 2025
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Summary
As the five of them made their way down a manhole and through dark, stinky tunnels, the rat finally sighed in defeat when Blue grabbed his hand to keep himself upright while unsteadily wobbling ahead, chirping “Dad, Dad!” every time he nearly slipped and fell.
“Okay, fine, yes,” sighed the rat, “you can call me Dad. But it also means you have to do as I say and listen to me, you little menaces.”
And Blue didn’t know what ‘menace’ was, but he still laughed in delight.
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Glimpes of the time between the accident and the beginning of the show AKA I have no freaking idea :)
Series
- Part 13 of Teenage Mutant Ninja Turtles One-Shots!
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Sword and Sparrow by Abbie_Lauren2024
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
20 Jul 2025
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Summary
After being mutated Donnie and Mikey were saved from a lab explosion by Splinter, who soon became depressed at his new rat form. The two siblings, being fascinated by the human world, began to sneak up to the surface to explore and even made a human friend named April O’Neil. Upon seeing the mess that New York was in and inspired by their hero Lou Jitsu, Donnie and Mikey decide to try their hand at being heroes.
But how will they help if they can’t be seen by most humans? And what happens then they meet another set of mutant turtles who appear to be in a bad situation?
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A separated AU where Donnie and Mikey are saved by Splinter while Leo and Raph are raised by Draxum and Big Mama. (NOTE: This is a spin off of Wings of Ashes, which is the main fic in this series thus far)
Series
- Part 2 of The Shattered Lineage AU
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Forest of memories by Yulivd10
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
18 Jul 2025
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Summary
Leo watched him awkward. Instinct told him to try to relax and make a joke, but something made him feel that this one would not be well received.
"Don't worry, big brother," said the one in red bandana.
(And something in that sentence was wrong).
"You'll get your memories back and then we'll all be training together again, you'll see" he told him with a confident smile, looking like he believed every word he said. But faltering at the end of the sentence, showing a bit of his doubt.
Leo tried to smile back, only ending with a strange grimace.
Everything was wrong, his body was wrong. And even though he didn't know what was going on, he was just sure that those people were not his brothers.
O
Rise and 2012 Leo change dimension. The problem? They both have amnesia, they are in each other's body and they both just woke up from their respective coma.
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You’re Not Dad by Orind
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 Jul 2025
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Summary
Raphael is the oldest brother. This will be a big responsibility.
(Snippets of moments where Raph’s role as eldest was more prominent.)
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When the Kids Died, Nobody Cried for Me by 73lesbiansinfandoms
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
02 Jul 2025
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Summary
Title is from the song Heart by Rainbow Kitten Surprise
He doesn’t know why it was now of all times that his brain decided to let him in on this little revelation that his brain has apparently known forever. He couldn’t tell you why this of all things was the reason he snapped, but in hindsight he definitely should have seen it coming.
Donatello Hamato would never be able to forgive Splinter for the over a decade of neglect.
Not even if his life depended on it.Or; Donnie snaps at Splinter for all the years of severe neglect after he tries to wake up Leo.
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Finally Free by Hamilhorse
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
28 Jun 2025
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Summary
Splinter dies one night, and Mikey begins to realize that his father wasn't the person he thought he was from his brother's stories.
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Los Auténticos Decadentes by 0_hacerrato
Fandoms: Teenage Mutant Ninja Turtles (TV 2012)
20 Jun 2025
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Summary
Bajo la ciudad de Nueva York. Se encuentra una estación de tren subterránea que ya nadie recuerda. Allí se hallaba una familia de mutantes que permanecía oculta y a salvo entre la oscuridad. No tienen mucho, pero tenerse unos a otros ayuda a no pensar en la situación de pobreza y escasez en la que viven. ¿Verdad?
Seguramente sería más manejable si el patriarca de la familia conviviera más a menudo con sus hijos sin mostrarse apático o cansado, como para permanecer en su habitación durante días enteros lidiando con sus propios problemas. Y también si los cuatro jóvenes adolescentes tuvieran más entretenimiento que un juego de cartas.
Buscando mejorar su propia calidad de vida, y tambien conseguir algo de diversión, las cuatro tortugas subirán a la superficie hacia la gran ciudad. Esperando que sus habilidades ninja los respalden ante cualquier peligro. Sin esperar que su verdadero enemigo no serían los matones con los que se encuentren. Si no, las deficientes habilidades para comunicarse de todo el mundo.O
El universo alternativo que nadie pidió donde nuestros protagonistas comenten actos cuestionables y los villanos no son los malos realmente. Hecha con cariño.
- Language:
- Español
- Words:
- 18,708
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 5
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Magic and Sad Turtles (It Only Makes Him Feel Like a Worse Father) by Sunny_CSA
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles (TV 2003)
19 May 2025
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Summary
He misses his own father, and when he tries to call upon him he's sent to the body of himself in another time, where his sons are still so much smaller than him. He wishes those times came back for himself. He feels horrible knowing he left them, but grows to find these boys are much like his own. He wonders if his other self is treating his sons how he wants to.
Or,
Splinter (03) tries to use his limited knowledge of magic to summon his own father. He desperately wishes to see Hamato Yoshi once more, and meditating isn't cutting it anymore. He ends up in Splinter (2k12)'s body, as he was originally Hamato Yoshi in his timeline.
Splinter finds that the 2k12 turtles are much like his own sons and hopes that 2k12 Splinter is treating his sons well in his universe. Spoiler; he isn't.
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Raphie by flowersforramona
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
15 May 2025
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Summary
Red was the first, but Raphael didn't know that. In her mind, she was all that there had been, and all that there needed to be. To be safe. To protect them. But sometimes she felt it - something chaffing inside of her, like sandpaper against an open wound. Somehow, she was always bleeding everywhere, and she didn't know why.
raph has DID that's it that's the fic. come get yall juice
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I Should Have Eaten You In The Womb by Crowdog
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
08 May 2025
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Summary
By eight thirty the lair was running on generator power and Donnie’s ears were ringing so loud he couldn’t even hear the baritone of the motor thrumming out in the open sewers. Note vibrating on the handle because no twin had returned home to rip it off with a roll of his brown eyes before depositing the original propane tank nearby. Donnie couldn’t hear Mikey’s voice as he asked about Leo, he couldn’t feel Raph’s hand as they brought him into the lair to warm up his frozen fingers.
Someone else moved Donnie’s mouth and made his vocal cords vibrate into the open air of their home. Someone else stood in the doorway of their father’s room begging their dad to get out of bed because Leo was missing. Someone else felt the world caving in because all the things that were supposed to be unimaginable were happening right now.
As if panic could knock back a respiratory infection Raph and Mikey hooked the TV up with Donnie’s numb help. The weather report was worse than they last knew. That blizzard that was originally projected to hit tomorrow by one in the afternoon would be here at their doorstep much earlier.
Series
- Part 1 of maybe you weren't a terrible person
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It Isn't Easy Being Red by Leonardo1885
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 May 2025
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Summary
It isn't easy always being the big brother to three little siblings, especially when said little siblings are mutated turtles. But even though being a big brother isn't always easy, Raph wouldn't give it up for anything.
A series of drabbles from Raph's point of view on what it was like having to help raise his three little brothers.
Series
- Part 2 of Brotherly Bonds
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Un azul casi morado/naranja/rojo by Sunny_sunsun
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
16 Apr 2025
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Summary
Leo sabía que no era el favorito, te preguntarás ¿De que exactamente?
Pues absolutamente de nada, Leo crecio desde siempre sabiendo que nadie que lo conociera de alguna manera cercana le agradaría, estaba seguro que si Raphael, Donatello y Mikey no hubieran sido sus hermanos le hubieran dejado de hablar desde hace mucho tiempo.Todas la personas tienen un limite y Leo ya se estaba empezando a cansar.
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The Duke by Ink_Quill_Stories
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
05 Apr 2025
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Summary
Twelve years ago, in a fire that burned down Baron Draxum's dreams, Hamato Yoshi made the worst choice in his life.
Twelve years ago four turtle hatchlings were mutated to become supersoldiers in a war for the surface.
Twelve years ago Hamato Yoshi, now Splinter, became a father of three wonderful turtle sons.
Twelve years ago a star was born that took the Hidden City by storm.Wait... three turtle sons? Wasn't there supposed to be four?
Or Splinter lost a certain red-eared slider the day he escaped from Draxum's lab, who grows up by himself in the Hidden City.
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Family Is Who You Remember by ADHDplusCartonnsmakesCHAOS
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
31 Mar 2025
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Summary
"But we aren't. We're talking Hamato clan and lost memories. And the fact that you've forgotten that April's the oldest tells us she's part of the Hamato clan. She's your sister, and you gotta know who she is before we get back. Besides, Casey's your sister and she's human. You don't think shes a real part of your family?"
Mikey and some other mutants are kidnapped by scientists, and only a few of them are able to escape months later. To make matters worse, with his lack of mystic training Mikey had to give up all his memories of the Hamato Clan just to have enough power to break out. Now he and his new... unconventional family are making their way back to New York.
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Mio by Kaiisconfused
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012), Original Work
09 Mar 2025
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Summary
Having already lost one daughter, Splinter couldn't handle the pain of losing another one so he pretended that she never existed in the first place as a coping mechanism. Everything goes according to plan until she turns up alive seven years later.
OR:
I made a TMNT OC when I was younger and spent years developing her backstory. I swear she's not a mary sue and she has a personality (I hope)
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TMNT 2003: Scientific Interference by StarrBerryOddity
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2003)
28 Feb 2025
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Summary
You've heard of 2012 and Rise separated AUs,now get ready foooooooooor
*DRUMROOOOOOLLL*
2003! As far as I know,there are no Separated AUs of 03 on here,so I thought I'd make one! Full of new characters,differences and a somehow more angsty Leo! This is my first post on AO3 so if things aren't that good,that's why. Hope u enjoy!!
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Trust; Hard to Build. Easy to Break by Niiwasong
Fandoms: Teenage Mutant Ninja Turtles (TV 2012)
27 Feb 2025
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Summary
Raphael has never been a forgiving turtle. He knows it, his brothers know it. April and Casey know it. In his defence, it's well earned. He protects his brothers and his human friends, he protects himself.
Splinter wasn't always an attentive parent and Raphael hasn't forgiven or forgotten it, even if his brothers seemingly have.
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What We Leave Behind (How We Start Anew) by iam57311
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
20 Feb 2025
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Summary
How any of them ended up in this whole situation was a mystery. Regardless of how it came to be (and regardless of how much of this ordeal was Draxum's fault), they now had a bundle of baby mutant turtles under their responsibility. Such a thing can only be so easy when stuck co-parenting with someone you barely know but have every reason to hate just the same
Or, a take on the 'Splinter and Draxum raise the turtles together' AU that allows most of Rise canon to still happen... with a twist :)
Series
- Part 1 of What We Leave Behind
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Wildest Dreams by LitaLollipop
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
02 Feb 2025
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Summary
Donnie and Leo decided, back when they were kids, that they were going to marry each other. They have always been extremely close to one another and their family thought this behavior was borderline codependent. Then, they found that there was a reason for their codependency and unwillingness to let the other alone for a mere minute: They were in love.
Mikey was on their side, even if he didn't agree fully on what they were doing. Raph was extremely anxious as he tried to help them hide this from their father.
And Splinter, being so caught up in his own twisted mind and past, just believed it was brotherly love until he decided to play a bigger role in their lives as he fought his way out of depression.
The newfound couple must go through all of the obstacles their family, unconsciously, had imposed on them as they try to figure out their own feelings and how their relationship fits into their family.