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Leonardo Has Bipolar Disorder by Anonymous
Fandom Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
16 Jun 2026
- Words:
- 5,914
- Works:
- 3
- Bookmarks:
- 1
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Bots and Turtles by coffee_pop
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Transformers - All Media Types
03 Jun 2026
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Summary
Finally after in the sewers for 15 years, the turtles can explore the surface... but it could have gone better.
Who knew they would happen to discover an alien race planning to mutate the Earth in their image, a world fit for the Decepticon empire.The turtles must work together with a small Autobot Earth unit if they ever want to stop this threat.
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Summary
03 Splinter is at the end of his life, and fully satisfied with the way it turned out. And yet, when he does get that end, he finds himself awakening in Tang Shen's lap, a pet once again. How? Why? Does it truly matter? Can he change things? Does he want to? Let's see.
Series
- Part 10 of Turtle trouble
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Willing and Able, Brother by TheTwoPlayerGays
Fandoms: Project Hail Mary (2026), Project Hail Mary - Andy Weir, The Fall Guy (2024), The Gray Man (2022)
15 Jun 2026
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Summary
“Knock Knock.”
Ryland’s gaze was ripped away from the paper planets strung on his ceiling as the woman’s voice echoed through the otherwise empty classroom, sending a sudden chill down his spine. Stratt? He met her eyes from across his desk as she approached with that air of confidence she always had, so sure of herself and her decisions. She had brought with her a small satchel, one that Ryland knew instantly contained a copy of his research paper.
...How did he know that?
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A time-travel, sibling au where Ryland is sent back to the moment Project Hail Mary began, gifting him a second chance at reuniting with his brothers before returning to space. Now if only the brothers, who remember everything, can convince him to stay this time. -
This Clan of Hamatos by EchoKazul
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles (TV 2003), Teenage Mutant Ninja Turtles (IDW Comics)
19 Aug 2018
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Summary
Leo had come to realize one singular truth in his journey as the leader of the Hamato Clan.
Effective leadership was comprised of one part knowledge and common sense, two parts instinct and intuition, three parts dedication and hard work, and four parts of just inwardly flailing about while outwardly acting like you knew exactly what the heck you were doing.
Series
- Part 1 of This Clan of Hamatos
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Blood of the Covenant by Oroku Karai (zenonaa)
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2003)
16 Jun 2026
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Summary
When Darius Dunn gets his hands on a mind control chip that turns the victim into a Kanabo super soldier, he has his eyes set on Leonardo to be its host.
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The Choices We Make by tinybox
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2003)
11 Feb 2019
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Summary
"What's that thing supposed to be, anyway? Looks stupid."
"I think it's kind of cute."
"Course you would think that. You're the stupid one."
"Looks like an Acer buergerianum."When Dark Leonardo returns from his stay with the original turtles, he comes back with a bonsai tree. None of the others are quite sure what to make of the tiny plant, or for that matter, why Dark Leo chose to take it with him.
Set after 'DNA is Thicker Than Water'
Series
- Part 6 of Rewind (fast forward)
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Bridging the Gap by tinybox
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2003)
02 Feb 2019
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Summary
Sometimes it isn't grand gestures or heroic speeches that have the greatest impact.
(Mikey teaches Dark Leonardo how to play video games.)
Set during 'DNA is Thicker than Water'.
Series
- Part 2 of fast forward: pause: rewind
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Transformers Prime: War Collision by OnyxtheHedgehog_15
Fandoms: Transformers: Prime, Teenage Mutant Ninja Turtles (TV 2012)
08 Jun 2026
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Summary
Leonardo, Raphael, Donatello, and Michelangelo unintentionally get caught up in a war between two factions of transforming robotic organisms and are put under Optimus Prime’s protection.
But what they won’t expect is that their presence has already caught Megatron’s attention.
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And Home Followed With Us by ajsmellslikebooks
Fandoms: Project Hail Mary - Andy Weir, Project Hail Mary (2026)
13 Jun 2026
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Summary
Ryland Grace wakes up in space... and he's not alone.
All three members of the Hail Mary wake up en route to the Tau Ceti system. One of them doesn't know who he is. All the answers they need are here for them to find, deep in interstellar space. They just don't know it yet.
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I'm Ryland Grace - AMA by sly_as_an_alpaca
Fandoms: Project Hail Mary (2026), Project Hail Mary - Andy Weir
17 Jun 2026
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Summary
What the title says. About 11 years ago (from my perspective; relativity is weird) I was launched into space onboard the Hail Mary to figure out a solution to the Astrophage problem. Now I live on an alien planet I call Erid, in the 40-Eridani system. Yes, I’m actually Ryland Grace. Ask me anything.
Also, can someone please tell me if Eva Stratt is alive? And ideally send me a video of you punching her in the face? Guess that’s a long shot, but it can’t hurt to ask.
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Grace and Rocky figure out how to connect to Earth's internet from Erid. They may not have thought this through.
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Marked by vyn_studio
Fandoms: Teenage Mutant Ninja Turtles: Mutant Mayhem (Movie 2023), Teenage Mutant Ninja Turtles - All Media Types
08 Jun 2026
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Summary
New York finally feels normal again after the Superfly incident.
The turtles are going to school. Making friends. Living like regular teenagers.So of course, they decide to explore an abandoned building after class.
Leo thinks it’s just another dumb adventure.
Until he touches something that should not exist.
And something else notices him back.
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Leo gets attached by a demon shredder and tried to hide it from his family. But I bet we all know how it’ll end eventually. Lol
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Summary
He keeps going on and on, and Leo trails behind him when he starts moving and gesturing and hopping on two feet, losing track when he spirals into some tech jargon. Leo momentarily forgets where he is, watching his little brother’s eyes shine, and debating the soft, curious thought asking how often Donnie spends his time focusing on Leo when Leo doesn’t bother to take the time to wonder about him.
Series
- Part 8 of Stolen From Tumblr
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Brainiac's Bleed Black (Stand Alone) by NinjaNekosLibrary
Fandoms: Teenage Mutant Ninja Turtles (TV 2012)
14 Oct 2023
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Summary
This always happens to him.
Always. Freaking. Happens.
Battling a mentally unsound uncle to keep them all alive?
Check.
Leading his brother out into space to save the planet they'd watched explode?
Check.
Getting stuck in a demon temple because he just had to follow the weird voice in his head that was convinced this was the right call?
Checkity-freaking-check.
Series
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It Has Raisins by awcomeonmanisuckatusernames
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012)
28 Nov 2022
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Summary
Following the Kraang invasion, the gang couldn’t get out of New York. They ended up finding refuge, keeping a low profile and hiding in the city. Leo’s just woken up from his 3 month coma and Mikey thinks the last few weeks have been tense as hell, despite that good news. So, they all get some air.
And then a liquor store caves in on Leo and Mikey. Go figure.
*** (Post S02TheInvasion AU if they didn't make it to the Farmhouse).
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ROTTMNT at night – skin preview and guide by trufflemacandcheese
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
28 Apr 2026
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Summary
Forget standard dark modes! This skin is a hand-crafted "Neon-Night" interface built for nocturnal readers. Inspired by the glowing skylines of the background art of ROTTMNT, it replaces the default BG of AO3 with a deep, cosmic palette of dark purples and electric blue. Disaster Twin fans will love it!
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caring about each other and stuff by lockkeyy
Fandoms: Teenage Mutant Ninja Turtles (TV 1987), Teenage Mutant Ninja Turtles - All Media Types
01 Jun 2023
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Summary
Raphael wakes up at way-too-early in the morning and can't fall back asleep - only to notice Leonardo, who's supposed to be resting following his hyper-mutation (finally) being cured, is also up and around. And training. At what is functionally past midnight.
... he should probably do something about this, shouldn't he?
(Takes place between s10e02 and s10e03.)
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Unstable Mutations Fate by MinionEnji
Fandom Teenage Mutant Ninja Turtles (TV 1987), Teenage Mutant Ninja Turtles - All Media Types
16 Apr 2018
- Words:
- 5,028
- Works:
- 2
- Bookmarks:
- 3
Bookmarked by sharpmarble76
15 May 2026
Bookmarker's Tags:
Bookmarker's Notes
Technically incomplete but stands as is
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i'd burn this city down to show you the light by remrose
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
04 May 2023
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Summary
"We're not actually twins." Donnie heard himself say, feeling out of control, like he wasn't in the driver's seat of his body anymore.
"Yeah." Leo said, slowly. "We're literally different breeds of turtle. I don't need to be a genius to know that. But we've been twins for like, a decade. So that counts for something."
"Does it?"
or: if being a twin is a choice, donnie struggles with why leo would choose him
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here's your answer in spades by remrose
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 May 2023
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Summary
He stared at the little clip and listened to what was apparently his own heart beating. It was a very weird moment to realize that while he knew what the rhythm of his own heart was, he did not know his own name, where he was, or what happened to him.
or: donnie forgets a couple things.