1 - 20 of 537 Works in Insomniac Leonardo (TMNT)
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Tether by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
18 Jul 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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Cause and Effect by marah765
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
18 Jul 2025
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After starting a vigilante life back home, your past starts to seep in and a major accident causes you to move with your younger siblings to New York near your cousin, Casey Jones. An opportunity ‘suspiciously’ appears but you have no choice but to take the internship at TCRI. Unexpectedly, this leads to secrets from the past and future. Adjusting to your new life isn't that bad, except, you never expected your life to get out of control once you meet ALL of Casey’s friends.
TMNT DOES NOT BELONG TO ME -
The Great Blue Switcheroo by RedPoncho
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles (TV 2012)
17 Jul 2025
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Leo from 2012 and Rise Leo switch bodies. They come to the grand conclusion to try and play it cool and pretend to be the other Leo till they can figure out how to fix this whooooole situation. I can only see this going well and definitely not lead to some, oh I don’t know… Shenanigans?
Time line wise Rise Leo defeated the Shredder but hasn’t been declared the new leader yet. 2012 Leo has killed the Shredder.
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Journey of the Blue Flame by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
16 Jul 2025
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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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Devil's mission by TooFanaticDreamer
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
15 Jul 2025
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Summary
He's not just ordinary. And he knows it. He's always felt different from everyone else. Everyone knew he was and treated him as such. But what if it's even more complicated than that?
He shouldn't have been here in the first place. But he feels like he could make a difference. He has a right to. But the others don't see it that way and wish him dead.
It's too late, because with his newfound past, no one will accept him and he's forced to leave his current home.
..Where will he go now?
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♦️♦️♦️
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After a mutation in Draxum's lab, an unexpected guest joins the battle for the turtles. This causes problems and Lou Jitsu is unable to grab all the turtles. He escapes with only three and the fourth is grabbed by someone else. (Queen of the Nether world) A small turtle with red markings finds a home in the Underworld with the royal family.
But unexpected things happen in the little devil's life.(Maybe I can make a better summary)
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Twin Time by allansbf
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
14 Jul 2025
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"So when Donnie's shadow once again appears at Leo’s door, Leo shuffles in his bed and prepares to spend the night watching over Donnie as Donnie watches over him. He adjusts his sitting position, rustles up his pillows and-
Knock Knock Knock."
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Exquisite corpse by Stephi
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012)
12 Jul 2025
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Summary
Hay cosas que siempre salen mal.
ó
Miguel Ángel tiene estrés postraumático por lo que vivió en la Dimensión X e intenta sobrellevarlo a su manera, tratando como puede de no preocupar a sus hermanos.
Series
- Part 29 of Historias de cuarentena
- Part 2 of TNMT
- Part 1 of Too high to care
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The Universe replied, "Let this pass you by." by pawology
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
10 Jul 2025
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Summary
I wrote this at 6am
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I'm Not Crazy, You're Crazy [REMAKE] by ZHtheIII
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Samurai Rabbit: The Usagi Chronicles (Cartoon)
09 Jul 2025
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Summary
[Restarting this fic because I know I can do better and I improved the plot and some scenes a lot]
Leonardo does not belong here, does he look crazy? All he did was take an entire bottle of aspirin and *not* jump off of a five-story building, not a big deal at all. He's not crazy so why should he be put in a psychiatric unit?
While Leo comes to terms with his mental health and recovery inside a psychiatric unit, he meets five special people he'll never forget, and learns about other's mental struggles as well as his own.
OR
Leonardo Hamato was *not* crazy. He wasn’t supposed to be here. Did he *look* like a crazy person? All he did was down a bottle of aspirin and then chicken out from jumping off a five-story building. He wished he had just taken the leap, but noooooo he had to call his Uncle Hueso because he had second thoughts. Well, now he was having third thoughts, and those thoughts were telling him he should’ve jumped.
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I'm sorry I failed you by Fix_it_F3lix
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Samurai Rabbit: The Usagi Chronicles (Cartoon)
07 Jul 2025
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Summary
Future rise apocalyptic Leo and Usagi spend one last day together.
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The Warmth in Silence by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
07 Jul 2025
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Summary
A short one-shot where Donnie comforts a sad and depressed Leo one night
Series
- Part 26 of I love the disaster twins
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The Black Bishop by Leonardo1885
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
06 Jul 2025
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“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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A weird kind of friendship by crisiscris
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 Jul 2025
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Summary
Strangely enough, his first instinct wasn’t run away, or teleport to the farest anchor he had, he just stood there, looking at the eyes of that monster, the both of them did nothing but stare at each other for long seconds before he took a step, one step to the direction of his worst enemy, the one who despise him for trapping it there together, the one who took control of his loved ones, the one who almost ended humanity, the one who doomed them all.
OR
Leo remains in the prison dimension and makes some weird "friendship" with the krang, How is he getting out of the prison dimension??? i don't know
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Mama Leo and CJ’s adventure of the 2012 verse! by Therapist_Needed
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles (TV 2012)
04 Jul 2025
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Summary
The classic Rise Leo goes to 2012 version but with a twist. Leo is there with CJ!
Leo has some interesting secrets he’s keeping from everyone except his son.
Don’t know what I’m doing please don’t come after me. Also working on the title, feel free to recommend names for the title. -
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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Symbiosis by sleepy_tablesalt
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Jul 2025
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Summary
Leonardo is left inside the Prison Dimension, trapped inside this barren wasteland. Left alone with his sworn enemy, Kraang...
Or so he thought? -
Don't Think Twice, It's Alright by unlaikaly_occurence
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Jul 2025
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Summary
Leonardo wishes to reunite with his brothers after a terrible future, but is given one last task before he is granted peace.
Leo has spent the past two months rebuilding his home and his family, but one thing is in his way.A mandatory Future!Leo fic with hopefully enough distinction to be both unique and entertaining! Stay tuned for regular updates, although I can't promise a schedule quite yet!
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A Door Between Us by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
27 Jun 2025
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Summary
Since they were turtle tots, Leo and Donnie have always shared a bedroom. Now that they are older and becoming more independent, they finally get their own rooms. At first, they are excited. However, the loneliness and separation anxiety sets in, leading the twins to wonder if they are ready for separate rooms
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The journey of two twins leaving but always coming back together again through a shared bedroom
Series
- Part 22 of I love the disaster twins
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孤立主義 : Koritsu Shugi : [Isolationism] by stevie_writes_stuff
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
24 Jun 2025
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Summary
No one can remember Leo. Not his friends, his enemies, or even his family. Stuck with almost no answers as to how this happened, he must convince the people he holds dearest of his existence and recruit their help in fixing this mess. Although, not everyone maybe as accepting as he'd thought.
And the knowledge of a time limit leading up to him disappearing forever isn't making it any easier.
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From Fireplace Ashes by loopystar
Fandoms: Teenage Mutant Ninja Turtles - All Media Types, Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
23 Jun 2025
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Summary
Leo was okay.
Sure, he was having nightmares every day, and he had been avoiding his brothers like the plague, especially a certain purple individual, but hey, at least he was finally stepping up as a leader, right?
Okay, maybe he wasn’t doing amazing, but it's not like it was anyone's business!
or:
After the Kraang invasion and another failed mission because of Leo, he finds himself wishing for things to be as simple as they once had been. But sometimes our wishes are granted in the most unexpected ways, only to come back and bite us in the ass.