1 - 20 of 41 Works in NIDS | Neuro-Immune Deficiency Syndrome (Sonic the Hedgehog)

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  1. Tags
    Summary

    Despite having an incurable sickness known as NIDS (thus forcing her to live within the confines of a space station), Maria Robotnik was a sweet, joyful, and innocent girl who one day hoped to be freed from her illness. Alongside her friend, Shadow the Hedgehog, they promised that when that time came, they'd enjoy a life on Earth together. However, an unfortunate series of events led to Maria's demise, and Shadow being separated from his friend forever. Yet not everything was it seemed, as 74 years after the incident on the Space Colony ARK, that once-sickly girl reawakens in the modern world.

    Language:
    English
    Words:
    6,057
    Chapters:
    7/?
    Comments:
    2
    Kudos:
    17
    Bookmarks:
    1
    Hits:
    593
  2. Tags
    Summary

    It has been ten years since the Shadow awoke from stasis and Eggman has been forced into retirement. However, Shadow still has some concerns. Sonic arrives at his doorstep in the middle of the night and has been acting strange ever since - Not that Shadow cares. Sonic asks if they could be friends, what a ludicrous question given their history.
    ...

    In which Sonic and Shadow connect. Shadow pries, and Sonic lets him in.

    Language:
    English
    Words:
    11,252
    Chapters:
    2/?
    Comments:
    4
    Kudos:
    20
    Bookmarks:
    3
    Hits:
    117
  3. Tags
    Summary

    Sonadow Tangled AU

    Idk what else to say that’s it lmao

    Language:
    English
    Words:
    8,737
    Chapters:
    4/23
    Comments:
    33
    Kudos:
    50
    Bookmarks:
    12
    Hits:
    809
  4. Tags
    Summary

    What if Maria didn't die, but instead went comatose because she was shot in the back? What happens if she was also put into stasis while the doctors tried to figure out how to heal her? What happens if she woke up around fifty years later?

    How does everyone respond to seeing someone who's supposed to be dead? How does Maria handle being in the 21st century with all of its changes?

    Series
    Language:
    English
    Words:
    92,926
    Chapters:
    24/?
    Collections:
    1
    Comments:
    328
    Kudos:
    951
    Bookmarks:
    167
    Hits:
    26,893
  5. Tags
    Summary

    It’s a day like any other - busting bots, kicking Eggman’s butt - when Sonic suddenly collapses. His friends are confused; Sonic doesn't seem to have received any injuries?

    Thanks to Tails, they quickly figure out what's wrong, but the discovery is harrowing:
    Sonic developed N.I.D.S.

    Language:
    English
    Words:
    12,437
    Chapters:
    2/7
    Comments:
    44
    Kudos:
    169
    Bookmarks:
    25
    Hits:
    1,548
  6. Tags
    Summary

    Before the experiments, before the Ark fell silent—Maria Robotnik was just a girl trying to understand her grandfather’s dream.
    Through recovered voice logs from Dr. Gerald Robotnik, Project Anchor records the moment a wish became an equation.
    It starts small. It always does.


    [PROJECT ANCHOR — FILE 001]
    Classification: Level 7 / ETERNITY ACCESS GRANTED
    Origin: Space Colony ARK — Research Deck 04
    Recorder: Dr. Gerald Robotnik (Voice Log 0001-A)
    Subject: Maria Robotnik — Initial Wish Observation
    Status: ACTIVE / UNREDACTED / ARCHIVE STABLE
    Note: This file constitutes the first recovered document of the Glass Choir Archives.
    Subsequent projects—Black Star, Deathwatch, Eternity—remain under review.


    Series
    Language:
    English
    Words:
    45,461
    Chapters:
    1/1
    Hits:
    85
  7. Tags
    Summary

    After receiving a letter from his supposed dead sister, Shadow sets out on a trip to the town of Silent Hill to discover the whereabouts of Maria, while finding out more of the quaint little town's history and his own relationship with the strange happenings of this place.

    Series
    Language:
    English
    Words:
    85,025
    Chapters:
    14/?
    Comments:
    67
    Kudos:
    93
    Bookmarks:
    28
    Hits:
    2,299
  8. Tags
    Summary


    The world called him a weapon.
    She called him her friend.

    When the ARK fell silent, Maria refused to let the universe forget the boy who protected her.
    Grief became invention. Devotion became something unrecognizable.
    Every promise she made to bring him back pulled her further from what she was meant to be.

    There were no glass choir satellites yet, no black star containment, no grand design—only a child clutching a broken dream and calling it strength.
    In the end, all she wanted was for the world to remember him.
    But the universe does not remember gently.

    Star of Golden Shadow is the story that started as an idea and then became the wish that would break the world.

    “Some stars are born to guide the lost—
    and others burn simply because they cannot bear the dark.”

    — Dr. Gerald Robotnik

    Language:
    English
    Words:
    41,847
    Chapters:
    5/5
    Kudos:
    2
    Bookmarks:
    1
    Hits:
    94
  9. Tags
    Summary

    Part of Shadaria Week 2025- Free day.

    Maria Robotnik came back from the dead through a combination of miracle and mysterious circumstance. Normally, this is just another day in the life for her. But every once in a while... the emotions creep up. Particularly when she starts to remember her other lifetimes.

    Series
    Language:
    English
    Words:
    1,775
    Chapters:
    1/1
    Comments:
    6
    Kudos:
    8
    Hits:
    69
  10. Tags
    Summary

    Maria's getting older and Shadow never quite understood the holiday in the first place. But she'd never disappoint her ARK family, and he'd never disappoint her.

    Series
    Language:
    English
    Words:
    525
    Chapters:
    1/1
    Comments:
    6
    Kudos:
    8
    Hits:
    72
  11. Tags
    Summary

    Maria Robotnik misses Earth desperately. Her parents, her old bedroom, real weather. She wonders if there is a pair looking back at her and yearns for the stars as much as she does for that little blue marble.

    "Heaven is under our feet as well as over our heads" - Henry David Thoreau

    Series
    Language:
    English
    Words:
    804
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    16
    Hits:
    96
  12. Tags
    Summary

    Shadow Robotnik was a famous runner, known the world over for his Mach 3 speed, until an accident stripped him of his ability to run, with the one thing he was "good" at taken away from him things seemed to go downhill. Until his sister, Maria stepped in to try to get back her brother’s impressive speed.

    Shadow struggling after an accident on the track left him almost crippled struggles to find a way forwards, with GUN breathing down his neck, recovery seems hopeless, so he transfers from the GUN Academy to the local Emerald High School, in the effort of making ends meet for him and Maria while being under investigation for allegations of cheating. Despite the fact that Shadow never cheated once in a race.

    Series
    Language:
    English
    Words:
    914
    Chapters:
    1/?
    Comments:
    4
    Kudos:
    3
    Bookmarks:
    3
    Hits:
    87
  13. Tags
    Summary

    Once upon a time, Super Mario was a world renowned hero...

    But then, he came down with a rare illness, known as Neuro-Immuno Deficiency Syndrome.

    Professor Gerald Robotnik, feeling a great debt towards Mario for saving the lives of his family, decided to bring Mario aboard the Space Colony ARK, and attempt to find a way to cure him via his work on Project Shadow.

    Language:
    English
    Words:
    2,813
    Chapters:
    3/3
    Collections:
    1
    Comments:
    3
    Kudos:
    15
    Hits:
    147
  14. Tags
    Summary

    Maria has come to a realization: she's going to die. Naturally, she takes this about as well as one could expect; after all, even she has her limits. Upon realizing that she's the sacrificial lamb that pushes Shadow towards his future, she can't help but be upset that she's the price of the world's survival.

    When she meets a new face in Amy Rose, the latter gets to see how the lamb feels about being led to the slaughter, and how much it hurts to be a supporting character in someone else's life. Amy isn't content to let Maria face this news alone; she'll do whatever it takes to help her through this time.

    Even if it means helping Maria find a way to change the past.

    Language:
    English
    Words:
    11,701
    Chapters:
    3/?
    Comments:
    20
    Kudos:
    40
    Bookmarks:
    12
    Hits:
    744
  15. Tags
    Summary

    Maria wanted a friend. Gun wanted a weapon. Gerald wanted her wish fulfilled. Eight years of innocence, fracture, and loss forged Maria under endless surveillance, manipulation, and cruelty into Echo. Fourteen years of observation, silence, and ritual shaped Echo into Mira, a being who bends reality, defies death, and holds what they thought they could control. Every protocol failed. Every plan backfired. In the end, the universe itself answers to the consequences of their desires—because a child’s wish, when unstoppable, reshapes the world.

    Language:
    English
    Words:
    176,700
    Chapters:
    5/5
    Kudos:
    1
    Hits:
    294
  16. Tags
    Summary

    She had been dead since the moment she was born. Meanwhile, he would be humanity’s future.
    This is my retelling of the ARK incident, pulling together bits of lore form the games, movies, tv shows, etc- mainly from Maria's POV. A sick and dying teenage girl with so much time left and yet so very little at all, staring down the barrel of a gun of the most powerful military in the world, and her choice to defy them.

    Language:
    English
    Words:
    1,871
    Chapters:
    1/1
    Collections:
    1
    Comments:
    4
    Kudos:
    17
    Bookmarks:
    1
    Hits:
    121
  17. Tags
    Summary

    "I want my brother back, Abraham."

    "Your...Your brother- You mean Project Shadow!?"

    --

    Maria Robotnik has lived for fifty years on the planet she once looked down upon from the ARK. She's had a fulfilling life, the medication she takes making her condition less life threatening and more chronic. Still, she's now in her 60s and she's not getting any younger. There's still one thing she wants more than anything. Her little brother. The reason she's still alive to begin with has been locked away all this time. He needs the chance to live a life of his own.

    And it's hard to expect life to remain simple even when she does get him out. The world keeps turning and her cousin is still determined to take over it. Just as she and Shadow start to settle into a new normal, they have to fight for the world, though they're not alone in the fight.

    And Shadow? Shadow is quickly learning that even in the new "normal" everything is somehow weirder than his life on the ARK. Especially when encountering a certain blue hedgehog.

    --

    Written for the sthbigbang 2025

    Language:
    English
    Words:
    44,360
    Chapters:
    22/22
    Collections:
    1
    Comments:
    70
    Kudos:
    271
    Bookmarks:
    55
    Hits:
    4,649
  18. Tags
    Summary

    In which a decision made by Ivo Robotnik back in college comes back to haunt him.

    Language:
    English
    Words:
    9,610
    Chapters:
    4/4
    Comments:
    7
    Kudos:
    6
    Bookmarks:
    3
    Hits:
    139
  19. Tags
    Summary

    It was supposed to be a normal field trip. But, for Hector "High Five" Nieves, normalcy was taken out back and shot in the head the day his parents divorced and anything that remained was burned alive on his 12th birthday.

    He didn't mean to vaporize his power tripping homeroom teacher.

    Language:
    English
    Words:
    555
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    7
    Bookmarks:
    2
    Hits:
    83
  20. Tags
    Summary

    It was just a normal day on the ARK, Shadow was talking with Maria and Gerald was doing his Science stuff and all, then Professor Gerald had an idea, what if Maria had another Hedgehog to Talk with then just Shadow, someone who will understand her more with her ‘Girly’ things. He will create a sister for Maria, Nyx the Hedgehog. As soon as he got the idea of another hedgehog, he had plans for her, to be more powerful then Shadow and can not be defeated by anyone, not even Shadow. Meanwhile Shadow and Maria went from talking to painting their nails, looking at a movie and playing hide and seek. After all of that, Maria had an idea of baking cookies, she went to her grandfather professor Gerald to ask permission to use the kitchen, she went into his lab and saw Nyx design, she was staring at it for a long time, she already loved her

    Language:
    English
    Words:
    6,135
    Chapters:
    2/?
    Comments:
    2
    Kudos:
    4
    Bookmarks:
    1
    Hits:
    232

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