This story is a sequel to Rider on the Storm

For the briefest of moments, Anonymous wielded absolute power. He single-handedly destroyed the city of Canterlot, laid waste to Ponyville, decimated the Everfree Forest, and came dangerously close to annihilating the very Tree of Harmony itself. And he had an absolutely fantastic time doing it.
Right up until he lost.
Now he's stuck as a statue under the watch of the princesses he tried to subjugate, awaiting the time he'll be locked away forever, with the key no doubt thrown into a volcano. But from the very beginning, Anonymous suspected that the shenanigans of the good guys would cost him his victory at the last moment, and so he laid plans with his most loyal of subjects—all former soldiers of the Storm King he betrayed to obtain his power—to arrange for his release should the opportunity arise.
Unfortunately, he wasn't counting on the ponies calling in help from a faraway land. Enter the Four Princes of Zebrica, all wielding the same exact power that Anonymous did, and knowing a thing or two about how to put bad apples like him away for good. This is made even worse by the sorry state of Anonymous's storm beast forces, having hit hard times in the months since his defeat.
But not all is lost for the petrified supervillain. Because in a rare twist of luck, the Princes just so happen to unknowingly bring with them a zebra criminal with his own dirty little secret. A secret that not only secures Anonymous's release from captivity, but just might be the start of a horrifying new partnership, and with it, the birth of a new force of evil.
And of course, with all that going on, there's always the matter of the nascent Legion of Doom, plotting to bring their own age of darkness to Equestria as well...

Takes place during the final two seasons of Friendship Is Magic. With a few alterations here and there, because I HATE THE ANTI-FIM I HATE THE ANTI-FIM :bread:
Reading Rider on the Storm is strongly advised if you want any idea of what the hell is happening in this story.

King Sombra has been brought back to life once again—only this time, he doesn’t have his horn. Weak without it and withering away day by day, Sombra sets out for the Crystal Empire to find his missing piece, chaperoned by the downtrodden and endlessly kind Troubleshoes Clyde.

They’d better hurry. Twilight Sparkle has caught wind of Sombra’s return, and she’s getting awfully tired of destroying him.

Winner of the M/M Shipping Contest.
Cover Art by aquoquoo.

This story is a sequel to Rider on the Storm

Shortly after slipping out of Twilight's new school on account of it's boring lessons, the Young Six spend some quality time hanging out in the old Castle of the Two Sisters, deep in the Everfree Forest. With plenty of food provided by their friend Sandbar, they settle in for the night, swapping stories about their lives.
Unfortunately, one of Sandbar's stories involves the attack on Canterlot by the late Storm King.
This brings back some traumatic memories about Silverstream's own encounter with Anonymous - one of his commanders - during his separate attack on Mt. Aris, and how she only just barely managed to escape his clutches. And although Sandbar understands all too well what she's been through, the rest of her friends are in for quite a shock when they hear her recount the harrowing experience.

A little thing written in a few days to shake off some pretty severe writer's block, with the initial excuse of making it a Halloween special.
Takes place during the Season 8 premiere, School Daze.
Reading Rider on the Storm is strongly recommended if you want any idea about what's going on here. I'm told it's a fun read.

On the day of the Summer Sun Celebration, Nightmare Moon returned from her banishment. The power she had accumulated during her stay on the moon proved to be too great for Princess Celestia, and Equestria's ruler was defeated.

Weeks later, Anon arrived in Equestria via unknown means. Although lost and confused, his natural resistance to magic made him quite useful to Nightmare Moon. To his surprise, he quickly became one of her most trusted servants and found himself falling in love with her. Even more surprisingly, it seemed like she was doing the same.

Eventually, despite Anon's best efforts, Nightmare Moon was defeated and Princess Luna returned. Everyone was rejoicing. Everyone... except him. Because Anon did not fall in love with Princess Luna.

Anon fell in love with Nightmare Moon.

For a human that ended up in an alien world full of talking ponies, you've been living a surprisingly boring life. Sure, you have friends and go on adventures and stuff, but you don't really have a "purpose" per se. At least, you didn't until about a month ago, when a "heinous villain" that had been turned to stone went missing from Canterlot. Now, there's a washed-up queen crashing in your basement and stealing your love.

If only you could get her to admit that she doesn't actually steal it from you.

Twilight thought she was coming into her own as Princess of Equestria.

With each passing day, she grew more confident in herself, her choices, and her ability to rule. She even began holding her own court these days, and enjoyed hearing out problems and working on solutions for her subjects.

Yes, she really felt like she was getting a handle on it all, and could deal with just about anything her subjects and the position of princess could throw at her.

Then a little green filly waltzed in and threw her one heck of a curve ball.

"I believe Cozy Glow should be freed."

Excuse me, what?

Twilight had no idea what she was in for, and all the aspirin in Equestria wouldn't be enough to sooth the headaches to come.

Was there something in the Equestrian water supply that was turning cute fillies into devious little monsters, or is she just that unlucky? Well, at least this one didn't seem bent on world domination. At least, Twilight hopes she isn't. This green nightmare might be even harder to stop than Cozy Glow if she ever put her mind to it.

This is not a "Cozy did nothing wrong and the main cast is evil," fic. Just a little filly who may or may not be more than they seem offering a different perspective on the whole situation involving an evil little villainess and what is the best thing to do with her.

After a strange alien creature named Anon suddenly showed up in Equestria, it was only natural that Twilight Sparkle would want to help him adjust to his new environment. To do so, she enlists the help of local school teacher Ms. Cheerilee. With her guidance, Anon should be able to learn how to do things the "pony way," and before he knows it, he'll be another friendly face in Ponyville's growing community.

Unfortunately, Cheerilee isn't exactly a fan of the new human in town, nor is said human particularly happy to be under the tutelage of an elementary school teacher.

Is there any hope of them getting along?

The prospect of meeting an alien has always fascinated Rainbow Dash. With countless worlds out there beyond the stars, who is to say that extraterrestrial life doesn't exist? What would they be like? Would they be just like her, but with a gross third eye? Would they be sturdy enough to beat her in a fight, or quick enough to beat her in a race? Would they be malevolent and try to conquer Equestria with their DEADLY SPACE LASERS?

Yeah, you're none of those things. She's a bit disappointed.

Jack came to Equestria.

Unfortunately for Jack he came to Equestria tens of thousands of feet above the ground.

Jack very promptly died in Equestria.

This is how falling works.

What if one day you woke up suddenly drowning? The only saving grace you had was a multitude of pink limbs pulling you out and the next thing you knew you’re surrounded by dozens of Pinkie clones... and that you were one of them.