1 - 20 of 284 Works in Good Sibling April O'Neil (TMNT)
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2012 meets Rise and gets the wrong impression (Don't worry, they'll learn) by PinkAlicorn
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
07 Sep 2025
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Summary
2012 turtles plus April and Casey end up in Rise universe. They can go back to their own but decide to give the Rise group 'tips'.
2012 dysfunction meets close knit Rise.Edit: Made with ai.
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Brothers and Sisters by UlisaBarbic
Fandoms: Teenage Mutant Ninja Turtles (TV 2003), Teenage Mutant Ninja Turtles - All Media Types
07 Sep 2025
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Summary
Somehow, April wound up with four little turtle brothers. They made her life crazy but she wouldn't have it any other way.
A series of short stories/scenes (about 500-1000 words usually but may vary) about the sibling relationship between the turtles and April. Feel free to send prompts!
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Tether by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
07 Sep 2025
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Summary
Months after the Krang invasion, Donatello begins to experience severe shell irritation. When tests reveal leftover Krang matter lodged deep in his shell from the Technodrome explosion, Leo and Draxum perform a delicate extraction procedure to save him. Recovery seems promising—until Donnie collapses weeks later and begins coughing up blood.
After an emergency evaluation, Draxum delivers the devastating diagnosis: a rare, aggressive form of cancer, likely triggered by the Krang residue. As Donnie undergoes harsh treatment, Leo—driven by guilt, love, and fear—digs into his medical training, determined to find a cure. He refuses to let his twin slip away, even as Donnie weakens by the day.
Series
- Part 28 of I love the disaster twins
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It's not just a curse, it's a damn death sentence by GeekyMcGeek
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
06 Sep 2025
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Summary
After a mishap in Witch town surrounding Donnie's connection to it, Leo pays the price and is cursed.
At first he seems to be fine, no visible injuries or any signs of a curse actually being there. However, after a few days he falls ill, and it just gets worse from there...
Turns out he was hit with a "life draining curse". The spell is meant to slowly drain the life out of its victims until their body is unable to support itself any longer.
Will Donnie and the rest of the family be able to find a cure.
Or is Leo's last breath, approaching faster then any cure can prevent? -
Mikey was right (discontinued) by Jayjaytailtail
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
06 Sep 2025
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Summary
Mikey was always a firm ghost believer and Leo always a ghost denier. That was until the incident on top of Big Mama’s hotel. After that the lair became too quiet with each brother dealing with their own grief. Mikey decided to make an alter to cope but, what he didn’t expect was for Leo to owe him so much money.
Or
Leo dies in the bug busters episode but comes back as a swag ghost.
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The Shell Of Who I Was by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 Sep 2025
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Summary
After sacrificing himself to save his family, Leo is trapped in the Prison Dimension for an entire year. When a mystic rift tears open and the turtles recover him, he’s no longer the brother they once knew—he’s feral, wild, and unrecognizing. Haunted by whatever horrors he endured, Leo has forgotten what it means to be himself. Now, his family must face the impossible task of piecing their leader back together, while uncovering the devastating truth of what happened in that void.
Series
- Part 1 of Rise Leo Feral AU
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Blood Runs Thicker Than Water by Fyodors_Ushanka
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, Teenage Mutant Ninja Turtles (TV 2012)
04 Sep 2025
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Summary
Chuuya has thought about searching for his family since he found out he had one when he was 16. However, he never had the courage to. He was, to put it simply, afraid. Afraid that they would look at him with disgust if they found out that he is a mafia executive. Afraid that they wouldn't recognise him. Afraid that.. He wasn't really their son, that they would know he was just a clone of their real son (Though the mackerel always makes sure to tell him he is human in his own infuriating ways). Nonetheless, he thought it would be safer for his family.
Though, as always, Dazai made the decision for him and found the only family Chuuya has left.
Or
Chuuya Nakahara and April O'Neil are half-siblings
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Two Years, Two Keys by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
02 Sep 2025
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Summary
Two years after the near Krang invasion and the eve of their 19th birthday, Donnie notices that Leo is not himself, becoming quieter and more distant. With some gentle coaxing, Leo finally breaks down, confessing that he has felt trapped and tired, the trauma from his near-sacrifice and the invasion not leaving him even after two years. Donnie decides to do something about and surprises Leo with an apartment that the two of them can share together
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A series of stories of Leo and Donnie sharing an apartment in the Hidden City together, full of laughs, tears, and healing that can only be shared between two twins
Series
- Part 31 of I love the disaster twins
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Until I See You Again by Shattered_ontheInside
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Sep 2025
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Summary
In an alternate universe where Baron Draxum gave up his villainous ways long ago, the turtles are slow to take him up on his offer to train them until their delay costs them dearly when one of their own is captured and blinded by the Foot Clan while on a routine pizza run.
Accepting his new offer at proper training, the four turtles defy their mutated rat dad's objections and begin intensive work under the Baron to prepare for the return of a powerful being that is prophesied in yokai scrolls to bring with him world-wide destruction.
Realizing the Foot clan are reassembling the parts of the kori yori to reawaken the Shredder, Splinter is forced to admit the yokai who previously captured and experimented on him is right and they must work together to train his sons so they are ready in time.
But can the creator of the four mutant turtles use his mutagen to recover the sight of their wounded brother before the Shredder rears his ugly head, so he can aid in the fight?
And what will happen if he isn't able to do so in time?
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The Quiet Between Screams by Starlight1861
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Sep 2025
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Summary
On that fateful night, Lou Jitsu escaped with four turtles. But he had hoped to escape with five. A fifth turtle that had bit through its cage and fell into unrefined ooze, accidentally mutating early. During the lab explosion, both Draxum and Lou Jitsu believed the fifth turtle to be dead. But unknown to them, it was saved by a human war veteran, one of the few humans to ever walk in the hidden city. He found the little turtle and took it home, and named them Cellini.
But he left them. Somewhere even the living can't reach.
The Hamato brothers never expected to take in someone.
Cellini never expected to stay. Learning what family feels like.
Too bad family doesn’t stop the nightmares.Or the man who lost an eye.
After all, the past has a way of following.
———Or, the turtles discover they have another sibling, Cellini (they/them) and bring them into their family, now stuck in this chaotic fun!
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Survivor’s Guilt by JupiterJimsBootyyyShaker
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
29 Aug 2025
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Summary
One missed shot is all it took to nearly kill Leonardo.
Canon divergent fic if during the Rise of the Teenage Mutant Ninja Turtles movie, Leo didn’t come out of the portal safely. His family struggles with the aftermath of the devastating accident.
Raph-centric. -
The Black Bishop by Leonardo1885
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
28 Aug 2025
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Summary
“Ah, yes, I’m sure you have many questions for me, including how I know about your fascinating mystic abilities. But your questions are inconsequential, I know all about you and your family. I’m also aware that you turtles are the ones who were responsible for stopping the alien invasion a couple years back, along that giant portal in the sky last year. You and your so called brothers have been quite a matter of interest to me for some time now. It hasn't been easy finding you, but I knew it would only be a matter of time until we did. Of course we had to take precautions regarding your particular abilities. You won't be going anywhere so you might as well get comfortable. Welcome to your new home, turtle."
Leo groaned, ignoring the aches and pains in his muscles as the man turned to go, desperation pushing the words from his sore throat. “Wh… who are you?”
The man paused, glancing at Leo from the corner of his eye, lips pursing in consideration for a moment before he turned to face him again. His smirk returned as he fiddled with the dark glasses on his nose. “I go by many names, but if you must address me, you may call me Bishop.”
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Final installment to my Aftermath series.
Series
- Part 3 of Aftermath
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some time you’ve had by fenkizard
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
28 Aug 2025
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Summary
some time you’ve had and you’re almost out
Things go very wrong for Donatello when side effects start to appear from the Krang ship and only worsen as time goes on. Who says a mutant turtle immune system can connect with a giant spaceship and be ok?
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Reminiscing That Old Time by MissHowdoyoudo
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
28 Aug 2025
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Summary
The lab explosion still haunted Splinter, even seven years later. It wasn't because of the damage, or the trauma, though those were a big problem.
No. What haunted him most was the loss of one of his sons. A little turtle with red and yellow stripes. Gone, in a flash of orange fire.OR
A Separated AU WITH A TWIST aka Leo is a Tot during canonSeries
- Part 1 of RTOT
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Wanderer by Beaniesintheclouds
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
28 Aug 2025
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Summary
“There’s a gentle touch on his shoulder, and despite how much it shocks him he doesn’t react. He… he can’t feel his body anymore, his brain stuck between states of being. He can’t hear the muffled noise from the world, but he can vaguely see Raph in the center of his vision, speaking.”
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Leo struggles with keeping himself tethered to reality. Sometimes his family is there to keep him present, sometimes they are not. Here are a few snippets of awareness he has.
Series
- Part 19 of Beanie's Bonanza of ROTTMNT One-Shots
- Part 14 of Leo-Centric fics
- Part 9 of Distant Days
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A Thing About Family by UlisaBarbic
Fandoms: Teenage Mutant Ninja Turtles (TV 1987), Teenage Mutant Ninja Turtles - All Media Types
24 Aug 2025
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Summary
At the end of “A Thing About Rats”, Michelangelo does not escape quite as unscathed as they wanted. But it may pave the way for some new friendships to be solidified
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Rifts of Fate by Honeybee_Queenie
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Samurai Rabbit: The Usagi Chronicles (Cartoon)
14 Aug 2025
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Summary
When your world ends what exactly will you do?
Will you stand up and fight for what's right? Or will you let yourself be ripped away from the reality you were once familiar with?
Regardless of this choice, Usagi Yūichi needs to make a decision, and he needs to make it now. Even with the help of his new friends, and potentially, the help of a new, blossoming relationship, Usagi must make it alone.
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Journey of the Blue Flame by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
10 Aug 2025
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Summary
Leo feels like he is not living up to expectations after the Krang invasion. So, one night, he slips out unnoticed and runs away to Japan for two years to try and become a better leader. A better brother
Meanwhile, the family tries to search for Leo but end up losing hope after a while and Donnie is left to grieve the lost of his twin, unaware that Leo is alive and a thousands miles away from him
Series
- Part 29 of I love the disaster twins
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Just For You by JustaLittleBitCrazy
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
31 Jul 2025
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Summary
Time ticks by.
Minutes turn into days, weeks bleed into months.
Seasons come and go like the ebbing and flowing tide, bringing with them change as the years pass by.
Wounds heal, scars fade, along with memories.
Some disappear and some stay with a person for life, changing them like the shifting seasons, bringing out the best in some...
but the worst in others.
~~~
Years after the krang invasion Leo is attacked and sexually assualted by a genius he has known for a long time, who learned how to not only grow krang tendrils in her lab but also how to take control of them to make them do whatever she wants. His morally ambiguous twin brother seeks revenge - and what better way than to attack a person's psyche?
Non-con is implied, this au deals mostly with the aftermath.
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of spring cherry blossoms and unsent haikus by yummygoblin
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012)
31 Jul 2025
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Summary
[2013]
The moonflower blooms
Fleeting grace on this rooftop—
Glimpse of white on steel.[2017]
Cunning kunoichi,
When all my hopes have crumbled,
Will you mourn with me?[2020]
Caught inside his war,
Reluctant wakizashi.
Know that I loved you.or
TMNT 2012 Leorai where the two dummies are NOT siblings. Follows them through around 10 years of life (15-25).
For a fully epistolary fic, their communication skills are quite awful.
Many short chapters since this is epistolary, but I will post several at once!Spoilers! Summary for arc 3 (after the main series events):
Karai takes over the Foot clan and moves to Japan. Leo always wanted to visit Japan.
Right when things finally seem to be falling into place, it gets messier than ever before.