Takes place after the events of Sonic SATAM.
During MLP:FIM season 3

Now with Robotnik gone, all that's left is to fix the problems he left behind, the main issue being his robot slaves. When finding a description about a lost civilization within the computer Nicole, Sonic searches for what's left of the empire known as, Equestria, in hope of finding anything that might help with his problem. Things would go a lot more smoother if Naugus didn't interfere.

The ponies are anthro (just like Sonic).
And Sonic's personality will be that of the SATAM series.

Dr. Eggman has arrived in Equestria and has taken over Canterlot. Ponies are being Roboticized and hope is dimming. The Mane Six team up with Sonic in this fun filled adventure to stop the mad doctor from claiming the power of the Elements of Harmony and conquering all of space and time.

(Disclaimer: I do not own any of the images used in this story. All images belong to their respective artists)

This story is a sequel to Sonic Generations: Friendship is Timeless

Everything seemed to be going so well since the fall of The Last Ancient. Twilight and Starlight's time in Sunset Shimmer's world had granted them what they thought would be the final piece of the puzzle that they needed to reach the world that Equestria had almost joined with due to the disruption of time and space. And then Princess Celestia and Princess Luna announced that they would be stepping down.

In her efforts to restore the Warp Ring in the hopes of seeing Sonic and his friends one last time, Twilight inadvertently provided an easy back door to Equestria, allowing Dr. Eggman's chief enforcer to reach it and eliminate any threats the land may pose to the Eggman Empire. As part of his revenge for foiling his plans in the past, Eggman gave strict orders to drag Twilight and her friends to his world so they might see his glorious reign before he ends them for good. Luck proved to be in their favor, however, as the arrival of two friends who haven't been seen in a long time threw a wrench in the works and allowed them to be found by a band of freedom fighters known as the Resistance, led by more of their old friends from that world.

Now part of the uprising to reclaim the world, the Equestrians are hoping to help their allies, new and old, win their war, but time is not on their side. It is the darkest of times for the world, but their efforts may prove to be for naught against their seemingly unstoppable enemy.

Will their friendship and the smallest amount of courage be enough to turn the tides of war?

The battle against evil. A never ending cause that spans across infinite universe. Despite how different each and every reality may be, there is one constant. Good vs Evil.

But what happens when the evil forces of two separate worlds come together? Can one world's heroes handle another world's villains? The Elements of Harmony can handle any magical foe, but what will they do when their foe sends legions of mechanical monsters against them? And while the Freedom Fighters can smash through any machine, can they stand against the darkest of spells and darkest of souls? Can the heroes, who have such different tactics and stories, overcome their differences to take on the task at hand?

But above all else...is there enough room in this crossover to fit both Rainbow Dash and Sonic's egos? I hope so.

After a good day passed crusading, Scootaloo is napping before returning to her home when a rift suddenly opens before her. Out of the rift comes a strange ruby followed by a bipedal mustachioed being. Scootaloo quickly discovers that the ruby possesses great powers but before she knows it, she accidentally merges with it.

Now, she has to learn to control her new phenomenal powers, fight the mustachioed being who reveals to be a mad scientist who wants to use the power of the ruby to return home (and conquer Equestria on the way), and deal with the spirit of a sicko trapped in the ruby calling himself Infinite.

Perfect setting for the rising of a new, awesome super hero: Zero.

Crossover with Sonic the Hedgehog. Starts during season 4 of My Little Pony and after the events of Sonic Mania Plus.

After saving her friends from the evil Metarex, a Seedrian named Cosmo has been sent to Equestria instead of the death she was expecting. When she arrives, she is found and brought in by Princess Twilight Sparkle, who was preparing to take the throne and rule Equestria alongside her friends. While trying to find a way to make it back home and to Tails and her friends, Cosmo settles in to her new home in Equestria and makes new friends and memories with the new world's many inhabitants.

This is a story set during the ninth season of My Little Pony: Friendship is Magic, and after the events of the third season of Sonic X. All characters belong to Hasbro and SEGA, respectively.

This is also my own contribution to the #SaveCosmo campaign, and is a separate entity compared to my previous entries. If you're a fan of Sonic X's Cosmo the Seedrian and would like to support the cause, you can check out the campaign by clicking this link.

During an encounter with Dr. Eggman, Sonic activates a machine that wasn't ready yet, just as the evil scientist planned out. Endowed with the power of the Chaos Emeralds, which Sonic conveniently brought with him, the machine swallows the hedgehog and sends him into a new world, a world that has been divided for centuries and has lost all its magic. Now teaming up with a very optimistic unicorn named Izzy, Sonic will embark on a journey through the uncharted land of Equestria, to unite all the ponies, reclaim the magic, and hopefully find his way back home.

Spin-off story to "Sonic Generations: Friendship is Timeless", taking place between chapters fifteen and sixteen during the train ride to Canterlot.

Everyone knows that Sonic, Tails, Spike, the Main Six, Shining Armor, and Princess Cadance set out for and arrived at Canterlot aboard the Friendship Express to find and stop the monster that had intertwined two worlds and their fates together, but what happened along the way? While Princess Celestia and Princess Luna went on ahead and prepared for their arrival, Equestria and Earth's heroes had to go through more adventures in order to get to Equestria's capital city. Now, the story of their lesser known adventures shall be told.

So climb aboard the Friendship Express, grab a seat, and get comfortable. It's going to be quite a ride.

Sonic Generations: Friendship is Timeless TV Tropes page can be found here.

This story is a sequel to Harmony of Chaos

Shadow leaves Mobius for Equestria after Discord's defeat, hoping to make a fresh start. However, his friendship with Twilight develops until it becomes stronger than he'd anticipated, and leads him to a future he'd never dreamed possible.
However, while Shadow's life takes on fairy tale proportions, Twilight is faced with diffivult emotional hurdles...ones that she will never escape.

Well, my life has gone insane. I was attending my first ever convention with my mom and sister, dressed in a costume that looks like a black and blue Spider-Man that took me months to make. Then I find someone who offers me a mask and sword that'll complete my costume. Next thing I know, I'm in an anthro version of Equestria with all of Spider-Man's powers and abilities and my sister is a pink hedgehog with a hammer.

My own little take on a Displaced story. This is my first ever story, so constructive criticism is appreciated. Rated T for some swearing. Also, first 2 chapters are currently pretty bad but the rest is decent so please don't judge it until you finish chapter 3.

Feedback (your thoughts in the comments) on chapters will be appreciated.