Sonic Headcanons as stories, or possibly theories and AU's!

When a good future goes bad, Sonya "Sky" The Hedgehog must help Sonic the Hedgehog change things back by preventing the unthinkable from happening. Journey with the two as Sonya tries to prevent a drastic change in history: the death of Sonic the Hedgehog!

Many years passed since the incident which tore her from my life... But with the aid of my companions in my search for all seven Chaos Emeralds, I went into Super Transformation to form a powerful Chaos Control, enhancing my ability to manipulate time, and travel through space. Silver once told me I could use its powers to grant a miracle. So, I went back to save Maria Robotnik.

Kairi learns something new about herself and Silver just falls more in love with his girlfriend. Birthday story for antaurilover685. :)

Sonic meets the mysterious black hedgehog who looks exactly like him. Who is he and where did he come from? Let's find out.

Amy Rose is the famous author of "Whispers of Solaris" a popular fantasy book series, and struggles with an overbearing and violent fanbase. Her only escape is writing steamy romance novels under a covert pen name. After locking eyes with Shadow, a bookstore barista at a book signing, they are immediately hooked by each other's reassuring presence.

Five years have passed since the Metal War. When war hero: Sonic the Hedgehog, finds out the infamous Dr. Robotnik has resurfaced with a new scheme that puts the world at stake, he sets out with his two-tailed best friend: Miles "Tails" Prower, to stop the nefarious monster. New friendships will be made, rivalries will be forged, and limits will be pushed.

Years after the end of the war between the United Federation and the Kingdom of Acorn; a young teen orphan called Sonic with his powerful speed will end up starting his journey as a hero as he faces the robotic army of the scientist that destroyed his home and family.

Finding the right Zone to return home to has been anything but home for Julie-Su. Everything she had suffered through with her people was met with a horrible truth: the people she knew and loved were gone. Arriving on Earth, she found G.U.N., and Shadow. But her safety, her security, he was only a shell, the Knuckles she loved not in it. Her Soultouch...still there for him. ShadxSu

Silver shows up in time to stop the Paradox Prism from breaking all the way... but when they try to put it back together, it goes too far, and merges in timelines that split off long ago... (Crossover between all Sonic continuities)

X

Sky and Luke spend some time at a house at the bottom of a hill and share a romantic dinner with steak one night while they are together.

In which Tails is confronted by Sonic's mortality.

It usually takes about one to three minutes for someone struck through the heart to die, and Shadow had wasted at least one of them gawking.

(Takes place in the Light of Hope continuity) Infinite is living happy life with his family, but then something from his past tries to come back and haunt him. Can he deal with this unwelcomed intrusion and keep his family together or will it all go to Hell?

La vida de nuestro héroe era normal, pelea contra Eggman, todos viven felices y así...o eso pensaba, unos meses después de los sucesos de Infinite el conoce a alguien nuevo, alguien que le quitará todo lo que tiene, y lo dejara destrozado... ¡ATENCIÓN! Los personajes no me pertenecen, todos son de SEGA a excepción de los que voy a meter, que serán 2. No habrán escenas sexuales.

Sonic, Julia Woods and their friends are back in new adventures. When Sonic, along with his friends and enemies, enters the world of Julie, he again teams up with the red-haired girl to stop Dr. Eggman, find the Chaos Emeralds, friends and the way home. Follow the adventures of your favorite characters from the Classic Era of Sonic games in the real world.

The world needed a hero - it got two hedgehogs. Powered with incredible speed, Sonic and his sister, Ayla, embrace their new home on Earth - until Sonic accidentally knocks out the power grid, sparking the attention of uncool evil genius Dr. Robotnik. Now, it's supervillain vs. supersonic in an all-out race across the globe to stop Robotnik from using Sonic's unique power.

No hay una sola nube en el cielo. No hay ningún complot malvado que vencer. Cream ha venido de visita. Días felices por fin han llegado para Miles Prower! Siempre y cuando no haga muchas preguntas. ¿Pero que es mas importante? ¿Felicidad o verdad? ¿Y podrá el zorro mas listo del planeta asumir las consecuencias de su decisión? Traducción de Eternal Tails: Happy Days de Pantalion

[Prime] The adventure is over. But something's still missing...

After Amy's eventful birthday party on the Mirage Express train, Sonic walks her home. SPOILERS for THE MURDER OF SONIC THE HEDGEHOG game. LEMON/ SPICY SONAMY. ONE-SHOT

Silver, a naive hedgehog with psychic powers, tries to continue with his goal to turn the future into a better place. One day, he mets a stranger, someone who not only has some outstanding abilities, but also has a plan of his own. Will the naive hedgehog stop him before it's too late to save the future?

Phia the Bear, just wants to be normal and have an ordinary life. But can she really escape from her past?

witness the adventure of sonic and the freedom fighters as they face Eggman to save mobius and more, with new allies, and facing new enemies.

A strange beast has begun to ravage the lands of mobius. The Freedom Fighters are occupied, and the destructix are quickly taken out of action. Ixus Nagus continues to expand his ambitions to control the kingdom, and Eggman does not sit idly by. Pressure is building on all sides, moving to crush Sonic, and Fiona finds herself reconsidering everything she once knew.