1 - 20 of 180 Works in Leonardo Angst (TMNT)
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Tether by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
07 Oct 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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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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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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A Not-So-Willing Sacrifice by Shattered_ontheInside
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
06 Oct 2025
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Summary
Quite frankly, when Leo thought about being captured by the EPF it was...
. . .
Well, actually it was exactly what he had imagined.
🔹🔹🔹
Whumptober 2025 #6 - "No Grave Can Hold My Body Down"
prompts: medical restraints, pinned to the wall
Series
- Part 6 of My Whumptober 2025
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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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Summary
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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Shadows of the Hamato by Magisav
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 Oct 2025
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Summary
A year after the Kraang invasion, Leo still struggles with his failures and the weight of leadership. Determined to grow stronger, he makes the painful decision to leave for Japan, training to become the leader his family deserves. But after a year, a deep unease stirs within him through his ninpo. He returns home—only to find the lair in ruins, his family gone, and the Foot Clan's insignia flying over what was once their home. Believing them dead, Leo wages a ruthless one-man war against the Foot, hunting them relentlessly.
But his family is alive—held captive by Shen, the new, ruthless leader of the Foot. A cunning and powerful mystic, Shen seeks to steal the Hamato Clan’s ninpo, intending to ascend beyond mortality and reshape the world in her image. With the Foot under her control and power within reach, she will stop at nothing to claim what she believes is hers.
Unaware of the full extent of her plans, Leo has one goal: to destroy the Foot and make their leader pay.
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Endure Alone…or Together? by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 Oct 2025
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Summary
After being kidnapped by a mysterious organization, the Hamato brothers are separated and experimented on—physically, mentally, and emotionally. Each is told the others are gone. But what their captors don’t realize is that the bond between these brothers is more powerful than any chain, any scalpel, any lie. This is a story of resilience, pain, and the love that holds them together even in the darkest depths.
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It Didn't Matter Before! by Shattered_ontheInside for NerdyBoiYeet
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
05 Oct 2025
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Summary
Something was wrong.
The dull ache in Leo's carapace erupted into a blinding pain shooting through the hairline cracks that were leftover as a lasting reminder of what Krang Prime had done to him.
Specifically the ones that went over the stylish blue markings that lit up with his ninpo energy every time he tapped into his mystic powers.
This had never happened to him before! Sure sometimes when he practiced too long his shell wound up aching but he never really gave it much thought.
Donnie landed on his feet in the soft sand of a beach on a secluded tropical island, while Leo did not. Instead he landed on his side with a pained: "Oof!" followed by an: "Augh!"
🔹🔹🔹
Whumptober 2025 #5 - "My Panic's at the Ceiling but I'm Facedown on the Carpet"
prompts: quivering, phobia
Series
- Part 5 of My Whumptober 2025
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Hollow Echo by cupfee for qolden
Fandoms: Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types
05 Oct 2025
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Summary
Shredder would destroy the Hamato clan from within. An infection would eat away at them little by little, until nothing remained. His intention was clear: he aimed at the captain of the ship.
But the responsibility for pulling the trigger wouldn't be his.
or
I turned caged lunges by golden into a multiversal event.
Series
- Part 1 of metamorphosis
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Son of a Spider by Shattered_ontheInside
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
04 Oct 2025
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Summary
Life wasn't all that bad for the kappa teen son of the influentially wealthy Big Mama.
When he was an infant the red-eared slider kappa (who was really a mutant turtle - but he didn't know that) had been brought to the wildly successful spider yokai who owned and ran both the Hidden City's Battle Nexus and the lavish above ground Grand Nexus hotel by one Baron Draxum.
At first Big Mama had curled her lip up in disgust at the distasteful thought of caring for a helpless infant that couldn't do so much as feed himself. But instead of disposing of him that soft spot she held for Lou carried over to this little baby so that she held on to him and over time her mind was changed and her heart softened.
What was wrong with that? Even a villain can have room in their heart for love. Although their definition of how that love is displayed can be vastly different from what love really is.
🔹🔹🔹
Whumptober 2025 - #4 "Don't Be Scared, I've Done This Before" & #12 "It'll Be for Nothing"
prompts: non-human whumper, iron rod, loss of power (#4); withholding medical treatment (#12)
Leo-centric; canon-divergent separated au (raised by Big Mama)
Series
- Part 4 of My Whumptober 2025
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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
04 Oct 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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Survival and Determination: Disaster Twins Edition by Purpleandbluelove24
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
03 Oct 2025
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Summary
Leo and Donnie are on a solo mission fighting against Hypno. During the fight, Leo slips off a bridge and falls into the Hudson River. Donnie jumps in after him and the twins are taken downstream into New Jersey. With no phones, no portals, and Leo badly injuried, the twins must lean on each other to get back home
Series
- Part 32 of I love the disaster twins
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Summary
Leo goes through it in this I fear :(
- Language:
- English
- Words:
- 1,050
- Chapters:
- 1/1
- Kudos:
- 13
- Hits:
- 132
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Summary
A tmnt 2012 fanfict where Splinter is, well... Abusive. Transphobic. Homophonic. And A secretive asshole who is afraid of the truth one of his Son's Soon discover. But only Leo is shown this side, Everyone else is oblivious to what goes on behind closed doors.
Leo can't leave for fear Splinter will move to another victim... so he confident to his new friends, one of whom he gets giddy around.... Surely this friend will be reasonable... right? -
lamplight low (on troubled water) by Somethin_Strange
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
01 Oct 2025
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Summary
If you had told Leo a month ago literally any of this was going to happen, he wouldn’t have believed you. More than that, really- if you had tried to tell him anything about the Invasion before it actually went down, the slider would’ve laughed in your face. If you had told Leo- that cocky, young, deathly irresponsible Leo- that his brothers would die and it would be all his fault, that Leo would’ve just laughed it off with a terrible joke and a lazy grin.
But things are a lot less funny when the government has your family at gunpoint.
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Part three of my Quarantine AU, which you might want to read for context. The Kraang sink its claws deeper into Raph's psyche. Meanwhile, Leo tries his best to be a leader.Series
- Part 3 of quarantine
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Sick as a Dog, Dead as a Turtle by Shattered_ontheInside
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
18 Sep 2025
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Summary
"Heh," Leo let out as a nervous laugh "A-am I in a . . . in a c-coffin?"
"Now bro..."
It was Raph's unsteady, nervous voice that greeted him, trying but failing to speak reassuringly.
"we'll be there in eight minutes, there's no need to panic..." "Raph is right do not panic and conserve your oxygen!" Donnie finished for him, sounding like he was issuing a demand, but also like he was on the verge of one of his meltdowns.
Realization sank heavily into every essence of his being that he really for real was inside a coffin!
A coffin apparently burried six feet under.
His full bladder instantly emptied itself and the sound of a long, shrill shriek of terror - that didn't make it past the cover of the casket he was actively laying in - flooded his ears.
Series
- Part 7 of Short Stories
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Where You Belong by Shattered_ontheInside
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles (TV 2012)
17 Sep 2025
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Summary
How does it feel to be so very alone and so very forgotten?
Why do you enjoy tormenting me?
I will answer your question if you first answer mine.
Leave me alone.
Answer the question, Leo.
No. Leave me alone. Allow me a shred of peace for once.
Answer. The. Question.
I don’t want to.
You don’t have a choice.
I never have a choice.
Answer me.
I won’t lose control of my own mind!
Leee-ooo. Answer the quessss-tion.
Why?
Answer. Me.
I don’t want to.
How does it make you feel, Leonardo?
. . .
Despair.
Is that your answer?
. . .
Yes.
Good.
-or-
After being hit with a mystic attack that removes Leo's ability to communicate one unexpected turn after another takes his life on a downward spiral that rips him away from his family; seems to have no end; time and time again puts him face-to-face with the reality that where he is told he belongs is not where he wants to be...
and that makes him struggle with the answers to two important questions:
Can a hero be turned into a monster?
And does a murderer deserve forgiveness?
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The Shadow Assassin by NerdyBoiYeet
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
10 Sep 2025
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Summary
Separated Leo Comic. Leo was raised by Big Mama and Draxum to be a ruthless and effective assassin.
When his 'family' enters his life, things begin to change.
Will it be for better or for worse?
Series
- Part 1 of Nerdy's Art and Comics!! :)
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Until I See You Again by Shattered_ontheInside
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
09 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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Machines Don’t Bleed by Abbie_Lauren2024
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types
27 Aug 2025
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Summary
After taking the hit for Donnie, Leo is cursed into a robot form by the mayor of Witch Town. Everything that made Leo Leo is now written down in his programming—all his memories and personality carefully coded out inside his new robotic mind.
But what if someone tried to… alter his programming? For good or for harm?
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Got any coffee? by its_ya_theater_girl
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types, Teenage Mutant Ninja Turtles (TV 2012)
23 Aug 2025
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Summary
Look Leo really just wanted some coffee, he wasn't expecting to get summoned to some dark universe to deal with a villain they couldn't.
Honestly this dimension traveling stuff was getting old, but at least there was coffeeOh freak is that the kraang?
OR
RISE!Leo gets summoned to the 2012 verse