1 - 20 of 54 Works in Feral Leonardo (TMNT)
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The Shell Of Who I Was by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
06 Oct 2025
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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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Good Boy, Little Pest by Abbie_Lauren2024
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
06 Oct 2025
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After Leo is saved from the Prison Dimension, his brothers quickly realize that more happened than they had realized. Leo would get random bouts of feral bewilderment and had random triggers that had not been there before. What had happened to him?
Gaichū doesn’t understand what happened. One moment he was in his home, running away from a beating from Master and the next… well… the next he found himself in a strange new world surrounded by new enemies who seem to know him. Now he has to learn to navigate the peculiarities of this new place and hope Master won’t find him.
Peculiarities such as gravity.
And light.
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Green Thing: The Lost Ronin by Anonymous
Fandoms: Teenage Mutant Ninja Turtles - All Media Types
03 Aug 2025
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A mutant turtle with no name or memories is picked up by the government. Now he is living in an enclosure like a zoo animal.
(the title is a pun btw)
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one failure, one nightmare by Memory_Solise
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
19 Jul 2025
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After a badly ending mission and being kicked out of the lair, things couldn't get any worse right? Ig its not always best to ask that kind of question because it can, and it has.
or-
Leo accidently gets someone hurt and is kicked out of the lair. After living in the shadows of the streets he is taken by government authorities and something strange happens to his nimpo, by the time he is rescued he already new opinions on his brothers.
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Down with the Stockholm by devotedtosadpoetry
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
13 Jul 2025
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Leonardo is captured and experimented on until he is turned exactly into what they want him to be.
Some things cannot be undone.Meanwhile, mutants and yokai are in hiding, fearful of this powerful entity.
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when i'm alone by war_spacehog
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
15 Jun 2025
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Summary
The prison dimension was cold and dark. Debris everywhere. There were always things to be wary of, from broken ships to crumbling buildings. The Kraang could be hiding in anything. Despite the contrast in the bleak gray, the bright red lights of the creature's armor were hard to spot. Leo never had a chance to relax.
He wasn't sure what to really expect; he knew this would happen. He honestly wanted it to. Better him than his brothers, right?
He tried to suppress his memories of them. It made it that much harder to live- well, survive- in this desolate hell. He wondered if they moved on frequently. Had they made him a grave? Had they cleaned out his room?
His thoughts always circled back to them, no matter how hard he tried. It hurt to think about them.Series
- Part 1 of leo and kraang angst babeyy
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broken love song by stillateenageabomination
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
04 May 2025
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“I don’t know how old I am,” he said, the thought coming to him as he voiced it. That happened to him a lot. He wasn’t great at keeping what was in his mind from spilling out through his lips. Or at resisting the bone-deep instincts to bare his neck, dive to his knees, trade out reality for falsehoods if only it meant five more minutes without the end of the world.
Raph blinked. “Seventeen. You’re seventeen.” He messed with the remote, but he didn’t change the channel. Just picked at the battery casing, popping it in and out, in and out. “Our birthday passed while you were – you know. With him.” He finally pressed down on one of the buttons and turned down the volume. “Do you know how long that was?”
Forever. Ten thousand years. A lifetime and an eon and the same exact stretch of time that it’d taken to shape the mountains from dust, erode stone until it became smooth.
“It was about four months,” Raph said, and Leo felt something crack.
or, getting Leo back was the easy part. Leo is still wholly convinced that his love for the Shredder supersedes all logic. After he's spent months at the Shredder's mercy, the hard part is convincing him not to go running back to the man he calls master.
Series
- Part 3 of never see a doctor
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Dream of Home by Opal_Edge
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
02 Mar 2025
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Raph, Mikey, and Donnie grew up just the three of them. Arguing, training, and discovering the hidden city and everything it entailed. They didn't know anything is missing. Not until they stumble upon a turtle mutant during a mission, bruised and battered and very much an animal. After years as a test subject Leo barely has any humanity left. It will take a long, long time to rehabilitate him, but for family they would do anything.
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Feral Infection by Cloud_Static
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012)
07 Feb 2025
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Summary
With a scoul on his face and a can to be kicked, Raphael wanders through a recently abandoned part of the city. A mysterious explosion two months ago deemed it uninhabitable.
He turns a corner, when white eyes with red strips stare back at him, he thinks there's more to the explosion the previously thought.
Or
Leo and Raph go feral in the 2012 universe. Raph, is sick. So Leo has to take care of him and protect him, like Raph always does for him.
Inspired by Rotten Reflections - By - Nicoforlife
(On Hiatus)
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Lost to the Stars, Recovered with Scars by jeannettebanana
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
02 Feb 2025
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Leo is lost to the prison dimension. After 3 days of trying they finally get him back, but he has changed drastically. For Leo over 3 years has passed during those few days for his brothers, and all that time stuck with the Krang has changed him. Leo is forever changed in ways that are irreparable, but can he learn to be himself again? Will he ever find peace again?
Series
- Part 2 of ROTTMNT Separated Feral Leo AU
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power ballad by stillateenageabomination
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
27 Jan 2025
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Summary
The headphones were tossed onto a work desk without care, crashing into the surface with a rattling clang. The sound echoed in the quiet chamber, and Leo flinched as he brought both hands to his tympana. His eyes were screwed shut, lips pressed tightly together. After a moment, though, he cracked one open. The next followed as he stared wordlessly at Splinter and the rest of them.
Splinter opened his arms. “Leonardo, my son – ”
“Ahem.”
Leo was off like a shot. He scrambled to his feet in such a wild motion that he smashed into a table, pushing off of it as soon as he collided. Beakers and bottles and all sorts of sciency shit smashed into shards. Between one heartbeat and the next, he was on his knees, shell to them, facing Shredder.
Raph felt his stomach turn.
or, the aftermath of the almost four months Leo spent with the Shredder. Conditioning and sensory deprivation has done its job and turned him into the loyal son the Shredder asked for. The Shredder couldn't be more content, really. Raph, Donnie, and Mikey, by comparison, are sickened by what their enemy has done to their brother.
Leo is just scared.
Series
- Part 2 of never see a doctor
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Summary
Leo was dead.
Raph knew that because he was the one who killed him.
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When the boys find out Leo's body has been repurposed into a TCRI experiment, they do their best to restore him to the brother they lost.
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Prolonged Agony by TheArchetypeArchives
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
17 Jan 2025
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Summary
End of the movie… or at least it should've been.
The Krang successfully grabbed Leo's leg and pulled him back into the prison dimension. When, unable to keep it open, the portal closes. Locking him in the void with the most malicious creature he's ever met.
Now it's a race against time to bring Leo home. But with each attempt they see Leo deteriorate… and Mikey starts to question whether or not Leo should be allowed out of the prison dimension at all.
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2 Sides Of The Same Coin by SamXluna1220
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
15 Jan 2025
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Summary
Following the events of the movie,
Leo was gone. And instead of bringing back one suicidal twin. They had two.
Oh yeah, there's also feral Leo! ;) -
i'll be good by orphan_account
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Jan 2025
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Summary
He didn’t recognize where he was, not at first, but as he took a good look at where he was his gaze flickered up to gaze at the buildings. The mishmosh of rigidity paired with the organic, round shapes made his memory jog just a bit. Looking around, his gaze went to a billboard, a bit faded, before his eyes widened and his stomach dropped as he looked at the advertisement.
… Oh. Oh, he was..
He was way back.
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aka, Future Leo gets sent much farther back than intended and he's hellbent on keeping his family safe -
waiting room by stillateenageabomination
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
28 Dec 2024
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“I’ve researched operational and classical conditioning,” Stockman mused. “I could teach him to fear you in nothing but a few short weeks.”
“It’s not fear I wish for him to know.” Saki traced his hand lower down the boy’s skin. Such an ugly green. Trust Yoshi to downgrade so drastically after failing the first time with Shen’s offspring. “I’ve spent the better part of a year hunting down his family. Last he opened his eyes, I’d gutted him so intensely that you’ve wasted a small fortune on healing him. No, it’d be too easy for you to associate my presence with world-ending, blood-curdling terror.”
He cupped his hand around one side of Leonardo's face. “I want you to force him to love me.”
Stockman didn’t blink. “Why can’t I do both?”
or, at the end of season 2, the Shredder decides to keep Leo and instead sends a message by hurling Splinter's comatose body through the window. This gives him about three months to break Leo down into something new, through a combination of sensory deprivation, sensory overload, and a whole lot of mindfuckery. He wants a loyal devotee, even if he has to cram love down Leo's throat until it's all he's capable of bearing.
Series
- Part 1 of never see a doctor
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A Cold Year by DefinitelyaUsername
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
23 Dec 2024
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Summary
Leonardo was kidnapped by the EPF directly after the invasion. He's kept there for a long time before his family finally manages to get him back.
Series
- Part 19 of Leo centric fics
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cry and cry and cry and- by DreadPirateElla for DaFlangstLairde
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Dec 2024
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Leonardo hasn’t been the same since Michelangelo miraculously saved him from his imprisonment with the Krang. What was only a few moments for the people on Earth had to have been longer for the turtle with the red crescent stripes and endless jokes and a contagious smile and and and-
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a little drabble I wrote in like an hour based on the incredible fic "Love is Love is Love is" by my friend DaFlangstLairde. You don't necessarily /have/ to read that fic before this one, but I highly recommend doing that to make it make more sense!! -
Festina Lente by HarlequinKing
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
23 Oct 2024
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Summary
Leo dies in the prison dimension but for whatever reason, he wakes up in his body four years before the initial Kraang attack. Without the allies he and his brothers gained later he’s left alone attempting to prepare and plan before his headstart comes to an end.
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Operation Sleepy Slider by Artralic
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
06 Oct 2024
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Summary
“Trust me this is way more serious.” Raph tries to bring the younger turtles up to speed, only to be interrupted.
“Booooo! No, you know the rules! No seriousness on Lazy Sundays!” Mikey is a big proprietor of lazy days and makes sure everyone follows the rules of having a stress free day. It works only because it guilts them all to rest, if only so Mikey isn’t stressing about them not resting.
“It’s Thursday Micheal.”
“Yeah but it has the spirit of Lazy Sunday”
“Guys!” Raph’s outburst brings their attention back to him, but their deadpan stares show they still don’t appreciate the seriousness Raph is trying to infringe upon their relaxation.
“Guys, we got a code Sleepy Slider on our hands.” Raph’s voice is grim, his face shadowed with the weight of the situation they find themselves in.
With the code spoken, Donnie and Mikey sit at attention.
~ ~ ~
or Leo's insomnia strikes and his brothers help him get some rest.