When Samus receives an emergency message from a space laboratory that orbits a planet only known as "MBS12", after landing and investigating she learns about what happened on the station.

Tanya reborn into a new life with Neuro-Immune Deficiency Syndrome, lives with her scientist grandfather. Brilliant but terminally ill, she refuses to accept her fate, pushing the limits of science alongside her grandfather.

The Roseinian Armed Forces are invading the Mushroom Kingdom and Sarasaland, so Sonic, Tails, Shadow and Rouge head on over to help out Mario and the gang to push back the commie threat. Rated T for war violence, language and some suggestive content. Also includes Shadamy and Luigi/Daisy.

Part of Aragorn II Elessar's When Legends Meet series, this short story sees a blue rift tear open above the Archylte Steppe, unleashing Metal Overlord. Cold, calculating, and ever-evolving, it seeks to claim this world as its own. Lightning and her team must push their limits to stop a force unlike any they've faced. But can they withstand the fury of 'The King of All Creation?

El doctor Eggman se apodero del Mundo de Mobius, quedando un solo lugar seguro, una ciudad domo, Central City, un valiente equipo de héroes vinculados con el poder Metamorfo pueden detenerlo. Post parte de la saga Bowser

In a fan-made crossover, Team RWBY joins forces with Team Sonic to save the worlds of Remnant and Mobius from an inter-dimensional collision course, destined to destroy both their worlds completely. Can their teamwork save both worlds? What enemies lie in the midst of their team-up? Only time will tell. Note: THIS IS SET IN AN AU AFTER THE EVENTS OF RWBY VOL. 2

Pre-ME1 post-Frontiers Xover, in which the Sonic version of Earth replaces ME Earth. A Batarian planet suddenly turns invisible, and things only get weirder from there. That poor STG agent won't know what hit him, that's for sure. And neither will the rest of the galaxy - once Sonic and Eggman get there. Crossposted on Spacebattles and AO3. Rating may change. NOW ON TV TROPES!

the real story of the THE ALBIGENSIAN CRUSADE! Seriously, it's here on the internet so it must be true!

Sonic was in the middle of an important mission with his friends. He soon winds up accidentally causing Chaos Control! Now he finds himself in an unlikely situation… he’s surrounded by quirks & even more heroes! He soon runs into some unlikely allies so they can help him find his friends and get them home. Little does he know that Dr. Robotnik is here in Japan…

Sonic The Hedgehog characters in the place of Owl House characters.

Halloween has arrived! But it's not all trick or treating for VLADJI, Miriam, Olga and Car-Lynn, as the event drains the avatars, and another event causes those seven humans to gain their powers. And they must use their powers wisely, as monsters and ghosts are on the hunt. Rated T for language (read: Car-Lynn's mouth).

Sonic and Sage after give up their live to fight The End now are in a new world with a metal human society. What impact will they leave?

After pushing the Space Colony Ark away from Earth, Shadow finds himself in the world of Sailor Moon. Meeting up with a girl who reminds Shadow a lot of Maria, he helps her become a great hero known as Sailor Moon. (Set in the Sonic Movie Franchise.)

What If Sonic was in Fairy Tail ? What if Sonic was a dragon slayer thanks to Laxus and was the boyfriend of Wendy Marvell ? Read this fanfic made by my complete imagination and the original scenes of Sonic The Hedgehog and Fairy Tail

Sage couldn't believe it. Her father, the great Dr. Eggman, dead. The invasion a complete failure. She hopes to take revenge for her father, but the Koopa King confronts her and offers her a deal. Be a good little minion, and he might bring her father back. And her first task is being Bowser Jr's friend! Here's hoping she doesn't snap and kill the little turtle prince.

Nature can be fierce or kind, and it doesn't stop for anyone. That is what Tsubasa Ejima learns when he and his sister, Yui, are caught in the middle of a power struggle between two kaiju (strange creatures) that seek to either destroy humanity or protect it. Godzilla! Sonic! When these two forces of nature clash, there's no longer any room for human intervention.

If Sonic, Sonic, and Sonic Reviewed Ruby Gillman, Teenage Kraken. Ft. Sonic

a bunch of cute one-shots

"In your own time, feel free on reading about my experiences with the most discussed figures in this journal."

VLADJI has to face down a conflict - between criminals. A forger with a soul blacker than his record, and a con man with a strange obsession with Amos are the opponents today. But who has more excuse to go? On top of that, news of the missile crisis hit VLADJI, and Amos is struggling with the fallout. Rated T for upcoming violence and antagonist racism.

When a strange multi-colored portal opens up and takes Izuku, he finds himself in a strange new world. Meeting Sonic and his friends, he is determined to find a way back home, while simultaneously wanting to protect this new world he’s getting accustomed to.

Chain of Generations: Re:MiX is a rewrite of Kingdom Hearts: BBE - Chain of Generations, inspired by the release of Shadow Generations. Sonic's birthday is disrupted by a mysterious hedgehog, scattering his friends across distorted echoes of time. Shadow confronts his own dark past, while Aqua's fading Keyblade connection drives her to save Ventus and restore the Land of Departure.

The sequel to Kingdom Hearts: Final Mix - Blue Blur Edition. Sonic teams up with Sora, Donald, and Goofy once again in a thrilling new adventure to save the worlds from the Heartless. But a new threat looms—Organization XIII, a mysterious group of Nobodies. As they battle across the many worlds, the mystery of Roxas and the true nature of Nobodies begins to unravel.

Synopsis: Like the title suggested, one day the dragon balls and Chaos Emeralds swapped places, Chaos Emeralds were sent to the Dragon ball universe, while Dragon balls were now in Sonic universe. Everything in Chaos now since each universe's habitants tried their best to figure out their lost artifacts' whereabouts, until it turned to a multiverse crises.

The story follows (not-game versions of) Sonic and his crew across the nine regions, interacting with Ash Ketchum and his friends along the way, with Ash and Sonic developing an intense and complicated rivalry during the former's journey to becoming a pokemon master, all the while getting into both exciting and dark adventures against enemies more vile and cruel than ever before.