For Donatello, measurable concepts is where logic reigns as king. Logic will thrive where the soul has no proof. But what about the intangible imaginations of the heart?... The soul will flourish where logic cannot be found. Denying the inconceivable mysteries of hope, faith, and love has dangerous consequences Donatello is not yet ready to face.

Nine years ago, Donatello's life was forever changed when a recon mission went horribly wrong. As a result, he spent thirty-one days at the mercy of the Kraang. Now, he must face the demons of his past. Will his family survive after reliving this tragedy or will it rob Donnie of everything? (WARNING! NOT for the faint of heart!) **2018 TMNT Universal Reader's Choice Nominee**

Tails dies and Sonic must live on without him. View Final Chapter for Update!

Multiple one-shots of Sonic, Tails, Knuckles, Amy and Sticks as they have their moments that bring them closer as more than a team, but a family. Adventures will be had, friends will bond, and maybe a bit of romance. REQUESTS ARE WELCOME! (See 1st Chapter for details.) (Boom!verse)

50 shades of gray for Undertale. (Except way more inappropriate)(I can't believe people actually like this. I was just trolling when I made this. Thanks anyways!)

Donnie is kidnapped by the Foot, and Rahzar and Fishface are put in charge of his captivity. Their goal? To be human again, at any cost- unfortunately for Donnie. But, at the darkest point in his life, an unexpected ally may lend a hand. Set shortly after The Lonely Mutation of Baxter Stockman. (Warning! Donnie is in for a rough time in this fic.)

After Donatello's un-mutation and Shredder's death, everybody struggles to pick up the pieces and move forward with their lives. April, Kirby, and Tang Mei (Tang Shen's sister) work to find a way to re-mutate Donnie, while Karai has vowed to take down the rest of the Foot Clan from the inside. They will be forced to work with the Kraang to succeed - if success is even possible.

The first time Frisk enters the underground, they finally feel like they have a family under Sans and Papyrus's care. They discover, however, that there is more mystery, pain, and love behind all three of them and the Underground itself. (SANSXHAPPINESS) (Agender Frisk)

Now more resolved than ever to find a retro-mutagen to fix April's father, Donatello works to build a supercomputer that will help him find a formula. With help from the computer-savvy Tang Mei, who is Tang Shen's long-presumed-dead sister, he succeeds. But Mr. O'Neil's salvation results in Donatello's own demise - and the only ones able to help him are their sworn enemies.

In this Undertale story, 4 leaders rule the lands. They're by the names of Asgore, Toriel, Sans, and Undyne. They each have their own strengths, and the 4 of them together makes them best rulers of the underground. But then a human by the name of Frisk is found, and the leaders are unsure about what to do. Is this being dangerous, or is she the savior of monster kind?

(Open Deviant Art Chat-room; #AnatomyUndertaleFF) Frisk has spent many years underground with her monster friends, all is well in the world under the mountain. Well..until her monster friends start wanting to now more about Frisk. And some skeletons are a bit or nosey than others. Some videos that fall into the Underground aren't very accurate of Human Anatomy.

A accident happens in Robotropolis that changes the way the freedom fighters look at Tails forever. Can Amy help bridge the gap between Tails and the Freedom Fighters, or has their already been too much damage to turn back? Completed

All monsters can fuse when they are close enough, due their magic core. Except for one particular skeleton. Frisk tries to help their friend out with his predicament. After all, humans can't fuse... Right? (Rated T because Sans has a dirty mouth when he so chooses)

FemTails. Very dark. During the war on Eggman, Sonic saves Tails from an attack on her home and takes her in. Together, they'll fight Eggman and their own pasts. Bad summery, bad title but a good story. WARNING Contains a very abused Tails, may be graphic later.

When in the middle of a fight, an explosion goes off far to close to Lúcio. Damaging both of his ears. Lúcio is going to learn what happens when he can no longer hear the beat.

The Shredder hatches a new plan, one of which includes the capture of a certain genius turtle. A inner battle begins as Donatello starts to question who he is and may never be the same. Nominated for Best Donatello story in Stealthy Stories TMNT Fanfiction Competition 2013

Frisk has been stuck in nothingness for four years. When she finds a way out, she is bombarded with new questions everyday. How will she find out away to get away from the void forever? And who will be there to cheer her up? (SansXFrisk) Other minor pairings. Please tell me your thoughts. Horrible summary.. First story *Minor swearing..*

It's been a fear of Sans' for a while now. That too many resets could lead to the walls between timelines breaking down. He hasn't let it bother him that much - after all, it's just a theory, right? That is until one reset, where Sans finds that the people close to him are starting to remember what happened to them in other timelines... Frisk has lots to answer for. [Female Frisk]

Donatello always knew his smarts would get him in trouble one day. He never expected it to be so soon though. *COMPLETE*

10 years after monsters and humans had collided, Frisk and the others remained close friends. Only to realize how much she truly missed the underground after all these years, she only had one request. To return. Whom would grant that wish for her? Sans, of course. Though there was a consequence. If you returned, you could never go back. Was the risk necessary? Maybe.. Frisk x Sans.

It's been years since the seal had broken in the Underground. Frisk has gone to pursue her own career in high school, but what happens when Frisk's old monster friends enroll with her into high school? High school AU, Sans x Frisk

Nineteen-year-old Frisk has led a happy, safe life after breaking the Seal that has hindered the Underground for so many years. But now, she faces a new struggle...a crush. And she has no idea how to go about dealing with it. (Sans/Frisk. Fluffy, sexy, with some occasional plot sprinkles thrown in. Hope you enjoy!)

In which Frisk introduces Sans to a certain musical about the ten dollar founding father without a father, and Sans takes it a little personally.

"Hey look, it's monster girl!" Some people bully Frisk, and Sans gets very angry about it, which leads to some sad conversations, and a narrow avoidance of a very uncomfortable one. BROTHERLY AND PROTECTIVE SANS! CONTAINS THE F WORD, DON'T READ IF YOU'RE VERY YOUNG AND GENTLE. FRISK GOES BY THEY, AND "MONSTER GIRL" IS MEANT TO BE MISGENDERING.

{Part of the Music Series. Undertale (c) Toby Fox} Sans and Frisk dance and talk while at a party. Rated T. Sans/Older!Frisk. Fluff. One-Shot.

For April O'Neil, life as she knows it, is about to change. A story following April after she is forced to move into the lair to hide from Shredder and the Kraang. Set in the 2012 universe and immediately following the episode 'Karai's Vendetta' (canon, up to that episode). An Apriltello fic.

This is an AU. In this story, they all grew up as humans, living their seperate lives. But when Miles Prower gets bumped up to high school because of his amazing intellegence, their lives all colide. This is a sontails, please read it anyways.

When April realizes that Donatello is able to do something that not even Leonardo is able to manage, Don explains how he does it.

Knuckles looks after a sick Tail's, the result of a joint RP by Sonicworld35 and Wrath Of The Heavens. Fluffiness ahead.

26 fluffy short stories about Apritello! You know the drill baby, rated M for safety! **NOW COMPLETED**

Discover why Tails has a Dark side and did not tell his friends about it and it take him on a Adventure to see why his Dark self want Tails there will be twist and turn around here and there that take him far more then he thought will be I suck at summary

Sequel to Hanging Out; Tails decides to spend a day out with Amy Rose again, this time with Cream along for the ride. While Tails continues to bond with Amy, there may be something dastardly awaiting them soon.

Donnie the ninja turtle and April the teenage girl share loving times together, and discover new things about eachother. Espicly when your a turtle. (Donnie x April)

this is my first ever m-rated fanfiction warnings: rape, mpreg, egg laying, nightmares, Dark Donatello, decisions about keeping the baby or aborting it, long chapters, and a tramatized 2k3 Don. Ever since Don was rescued from their evil clones he has been different. So Leo has Leatherhead find out what is wrong. The answer is something that will change all of their lives forever.

When Tails is teased by kids who have seen "What does the Fox say" by Ylvis, he is hurt and hides away in his room. Sonic is worried for him and tries to get Tails to open up. Will Sonic succeed in helping his adopted baby brother or not? Read to find out.

Don is kidnapped and an experiment is done on him that he doesn't want to happen. But will he come to accept it and will he escape and get to see his family again? 2k3 verse.

Rated/warning for suicide ideation. Donatello is an alchemist in the service of his Master Hamato Yoshi along with his father and brothers, when the unthinkable happens. Lost in pain and dishonor, Donatello is presented with a deadly alliance with a monster, a Beast, that will change him, his family, and the Beast forever.

Donnie gets injected with a dangerous chemical that alters his thinking, and its affecting everyone around him. Will his brothers be able to save him or is it damage beyond repair? Multiple endings. Hints of Apriltello. Blood and mild language.

What if Splinter only had found 3 baby turtles? What happened to the other one? What if the three brothers find him in a fighting animal ring? But most of all, what will happen when one turtle realizes that he is falling in love with the Feral Warrior?

"Sonic, you're so busy looking out there that you're missing the point. Your life belongs to you." Sonic spends a bit too much time staring out windows on his birthday and Tails is sick of it. /A fic in honor of Sonic's 23rd anniversary./

Donatello is not acting as his usual self. He's angry and sarcastic and his brothers are starting to get worried about him, but the usually smart turtle is not willing to share his problems with them.

I know, it's a weird title. Anyway Tails goes to visit Sonic in Super Smash Bros. mansion, and she (yes, a she) meets interesting new people there. Even thought Tails is in SSBB, I decided to make it a crossover.

Oneshot- A normal trip to the junkyard turns into a serious problem for Don and Leo. But Donatello shows that conflicts can be overcome without the use of violence.

"Donnie's upset and there may only be one person who can cheer him up..." A series of oneshots between Hamato Donatello and Oroku Karai! TMNT 2012 universe, oneshots, Donarai(DonniexKarai), fluff

"If someone has hurt Tails, I swear they'll pay." Tails has been taken and Sonic's only hope of finding him is to trust Aeronniell. A mysterious outcast who supposedly betrayed her friends four and a half years ago. Will she be true? Or will be betray her new friends like before? Please review XD. Rated T just to be safe.

Tails had been heartbroken for days since Sonic was killed by Scourge, (who was killed by Tails, in his Turbo Form, afterward.) Tails kept blaming himself for Sonic's death...but Shadow comes, comforts him, tells him about the circle of life, and becomes his new big brother.

sonic the hedgehog best friends is kidnapped by eggman to try to break tails spirt to make tails work for eggman

Sonic, Knuckles, and Tails are on yet another mission against Eggman. However, on the way to his base, Knuckles and Sonic begin to argue. Eggman sees this, and decides to fire a laser to finish them both off. Tails sees the laser, and pushes Sonic and Knuckles out of the way, taking the blast himself. Now, he finds himself fighting for his life. Will he survive or not?

After having a nightmare Donatello wanders the lair checking on his family. He soon finds out that he isn't too old for the comforts of his father.

My collection of April x Donatello one-shots. Some AU. Basically whatever pops into my mind. Enjoy if you wish :)

Having grown up with the tides of war, Tails is sick of the pacifist way of life he has grown up with. His first true mission outside of Sally's watchful eye leads him to see the gruesome reality that he lives in. Something must be done about it, and Tails is convinced that he can't find that help where he is. He must turn to someone else for answers...

A boy at the age of fourteen had been raised by Dr Eggman, and had been told that Mobions were evil beings until that same boy wanted to see for himself. Warning: Tails is female. Human x Mobion story.

What it says on the tin.

An encounter with some Foot ninja costs Donnie his life. His brothers, on the other hand, get depressed and have their shells handed to them by the Foot. Luckily, they were saved by a mysterious figure. Who is this mysterious figure, you ask? Hint: He wears a purple bandanna mask. Rated for blood, character death and Japanese vocab. Title from The Script's song of the same title.

When Donatello becomes ill with a mysterious flu, how will the gang take care of their sick, purple-clad genius? Read to find out! Hurt/Comfort story: titled "Infected" on dA (tmntloverxoxo) Enjoy!

Raph tries to find out what's bothering Leo, but he isn't willing to tell that to him. So why does he tell everything to Don, who weren't even asking about it?

Oneshot. Sometimes the reminder of a journey is more difficult to face than the journey's end itself.

Great weapons aren't created, they are born. Female Tails, get used to it. Official Announcement: I do apologize to those who like this story. I also don't care if you hate it. I see on occasion requests to continue it and I am sorry to say that I have long since lost connection with the other author. As such, this story, as it currently stands, will not be completed. I'm sorry.

Tails sings a song in Station Square...

Well, Tails is getting older! Here's a quick look at how he's been changing! ONESHOT

Ok its a yaoi based on Tails and Miles evil Tails So enjoy.

Tails is controled by an evil force and goes on a rampage, killing the ones he loves. What happens when Cream is the main target? Can Tail be stopped before it's too late? Many romances occur as hearts are broken and dreams come true...the bad ones...

Sonic has recently disovered tails is a girl. Do the two of them actually have a chance at each other? T for safety reasons.

A woman on a foreign planet needs Don to help her to win an election, but in a different way than usual. 2k3 verse.

One shot - Fluff! Donnie is ill and determined not to leave his lab until he's finished what he's doing regardless of what his brothers say... silly Donnie he should know them better by now! Please review my fluff

Ever since Cosmo died Tails has been sick, now on christmas night they gang are going over to Cream's house thinking that it the love of this night will help ease his pain. During the party Tails begins to hear a voice one as that of an Angle. Review

Some people can kill without even thinking. Some can murder and go on their way. Some can deal death without ever blinking. And some people will find that only their mind is the price that they have to pay. Companion piece to What Never Happened

A remake of Sonic X Season 3. When a young alien girl crashes on their world, a whole new adventure begins for Sonic and friends, until things go wrong when our heroes soon find themselves dead center of an interstellar conflict between Heaven and Hell. But there are far greater horrors than mere demons and angels beyond the grim dark void. (CURRENTLY BEING REVISED)

Donatello gets hurt. Title says it all really. And I guess it could be considered a one-shot?

One-shot. When a nightly run turns into an ambush, Don is seriously injured. While drifting in and out of unconsciousness, he flashes back to a promise Raph made to him when they were kids. A promise to always be there to protect him.

Written with dondena. An mpreg story. Old toon. Donatello is captured and put through a life changing experiment. Afterwards he and his brothers are put to the test, dealing with the chore of having to grow up fast.

Tails is female in this. My attempt at a seriousish fanfic, with romance, 'action' and the like. It starts of lighthearted as I starting writing it when I was 14. Mostly from Tails' POV.

Basically it's all about what happens after Sonic X series on TV. Tails is trying to get over Cosmo and Eggman's up to no good again. Will Sonic and Tails be able to overcome Eggman's new plot? And how close is Sonic and Tails as friends?

Only one creation in the entire Sonic universe is truly evil. Truly capable of deeds that even Dr. Robotnik would cringe at. A Tails fanfic which asks you, "Can you feel the sunshine?" Lots of Son/Tails brotherly!

AU. Sontails. Sonic has been having dreams about a small fox boy that haunt him. The sorrow of the dreams is causing him to slowly slip into a depression. When his friends try to cheer him up, he comes face to face with the his dream.

After Tails crashes the X-Tornado in a fight with Eggman, Sonic holds himself responsible. Tails is struggling to survive, and Sonic refuses to give up. Because friends stick together through everything, no matter the odds.

Tails has had a crush on Sonic for years. One morning, a day before Sonic’s birthday, he decides to pay with Sonic for years of friendship and reveal his feelings AT THE SAME TIME! How will this turn out for the young Kitsune? Read on and find out…

Tails has a secret he is really a she. After years of hiding her gender Tails isn't sure she knows how to be a female any more. But she will find help from a most unexpected source in Rouge who is going to teach our young vixen how to be a womam. FemTails

Dr. Eggman is back and plans to conquer Mobius by abusing the mysterious heritage of a long forgotten ancient people. Tails gets captured, Knuckles is hurt and Sonic needs to act fast to prevent the worst...

Eggman finally succeeds in doing things he always wanted to do. He obtained all seven Chaos Emeralds, almost killed Sonic, and managed to split up the planet all with the help of Tails. Sonic must now get the Chaos Emeralds and get Tails as well.

set after the 2007 movie. Three of the brothers have forgiven or come to an understanding...but one remains apart.

A moment in time between Donnie and one of his family members. Part of the Little Turtle series. A series of one-shots.

Tails is kidnapped to the Land of the Rising Sun, and his friends must go after him. SatAm universe with Archie touches, mostly on appearances. Despite the title, the other characters get plenty of action, it's not just about Tails.

Miles Prower is a two tailed fox who is constantly bullied and forced to eat garbage. When a certain blue hedeghog shows up on Westside Island however, Miles' life starts to change. With Eggman and his new super weapon out there he may finally get a chance at happier times.

Sonic comforts a distraught Tails after Cosmo's death. Oneshot. Songfic.

CHAPTER 8 UP! Donatello is seriously injured during a confrontation with jewel thieves. Raphael blames himself...because it IS his fault. NO SLASH.

Collection of snippets on our favorite Ninja Turtles! Snippet 3: 'Protector'. Raphael is fiercely protective of his younger brothers...

Edited and reposted. Donatello spoke angrily under two circumstances: major setbacks to his projects or prolonged periods of intense work without rest. They were guessing the latter this time...

When Tails gets beat up by a child visiting the Thorndyke mansion, he later later thrown outside by the bully to freeze to death. Can Sonic and friends find him and put an end to the bullies days of torture? Please Read and Review

What do you write on when you're in bed sick for several days in a row? A story with your favorite character in a similar situation, of course! A quick oneshot featuring Tails. Can the young fox avoid the flu bug that has already gotten everyone else?

99 percent of genetic mutations are harmful or have no appreciable effect on their host organism. However, one young fox has been lucky enough to beat these impossible odds since birth, or has he? Slight Son-Amy and Knux-Rouge. My first fanfic!

Our life is run by fear. In Part 2 of Fear, The Weapon, a new threat is brought to the town by random attacks of robots. Tails doesn't understand, but he soon comes to realize it when people begin to get hurt. Fear is not only an emotion, but a weapon.

Raphael is having a very weird day and when he notices he doesn't know much about Donatello he ends up analysing his little brother which can only result in a headache! A sweet story about one brother through the eyes of another.

Tails and his friends are much older now, and many troubles/problems they usually had on a daily basis are gone. Tails gained psionic abilities over the years, but it seems him and his friends have a new challenge after all these years. NO FLAMES

Sometimes times the best cure for an illness isn't the medicine you take by mouth, it's the ones you take by heart. Post!Good Genes 2. Gift fic for Crystal Aryuna. Preslash Raph/Don.

It's been a year to Cosmo's death. Tails still can't get over the heartbreak. But after a tender moment from Rouge, Tails follows her through intimate adventures and new found love. Tails X Rouge. Knuckles X JulieSu. Sonic X Sally. LEMON. Complete.

Good Genes 2... Just a one shot I've done about what happened after Don returned to normal.

Awe, marital bliss! Just a week after Raphie says he'll marry Don their first fight... sorta. RaphxDon and MikeyVsLeo much fluff, worried bros and jealous Raph. mild turtlecest, sequel to 'Leave it to Raphie' No.2

He could hear his brothers laughing and eating in the kitchen. A single tear ran down his face, as he wrapped his arms around himself. More soon followed as he quietly began to sing...

After Donatello's relationship with Angel falls apart, Leonardo tries to comfort his brother...only to find out his true feelings for him. LeoDon slashyaoi

Deathfic. Even on the most mundane day, with the most mundane events, tragedy can strike. A oneshot, told from Michelangelo's perspective.

It is a fight for who leads, only...it's gotten even uglier, who will win the heart of their target, and who will be leader? WARNING: Slash triangle!

Sonic has decided to give Amy a chance and begins dating her, But when he falls for her, How will a certain fox feel? TailsxAmy. Completed New Years Eve 2006!

Richard and Raven live together, but are not in love. They live in the dangerous Gotham City. So what happens when Richard's old girlfriend comes back and there's a murder on the loose? RaeRob.AU Please RR

A threepart story, formerly a oneshot, about the claustrophobic stresses of a life filled with constant fighting, hiding, and fear. Features nongraphic MikeDon, LeoDon, and RaphDon.

Summary: Robin and Raven have to go undercover to catch a drug dealing rapist. Catch? Of course. Raven has to be an exotic dancer. RobRae For Val.

Sonic gets Tails pregnant and at first all is well until Sonic gets a letter. When Tails is kidnapped in his heavily pregnant state Sonic has to save him before it is too late. [SonicxTails] some bad themes and language.

Alena's Challenge. It’s Raven’s birthday again. No prophecies to worry about, no Slade, no evil father, just a regular birthday party. But our Boy Wonder goes out of his way to help her celebrate. RobRae

Shad has a sister? Knux in love? Sonic engaged! Tails a female! What can get weirder? Oh my gosh, CHAPTER 6 FINALLY UP PEOPLES! YAAY! 'whispers' And this is NOT ABANDONED, IT IS JUST ON HIATUS. I'm sorry for the inconvenience!

A fortnight after the events of 'Shadow Fox', and Tails is haunted by visions of his evil alter ego. Will he crack under the pressure, or will Shadow Fox return to haunt Station Square another way?

Don't make fun of Donnie's weapon...wow, that sounds dirty. O.O It's not. Chibi fic!

After an accident in his lab, Miles Tails Prower goes on a murderous rampage with Eggman to conquer Station Square. Can Sonic and the gang reason with the unstable fox, or will the rise of Shadow Fox be unstoppable?

Donatello reminds his brothers, Raph in particular, that he's not always who they make him out to be. -oneshot-