Sire's Hollow is a quaint little town not too far from Ponyville. Anon would never have any reason to set foot in the place were it not for his best friend, Sunburst, asking him for a massive solid:

Keep his mother, Stellar Flare, preoccupied for a few days while he conducts research on the town's recently discovered magical properties.

Sunburst loves his mom, and they've worked through their communication issues before, but as head of the Sire's Hollow Development Committee, she would never approve of the tests he intends to run. So, Anon will act as a "distraction," allowing Sunburst to get done before she notices.

He does a better job than either of them were expecting.

It's been many years since Bright Mac and Pear Butter disappeared. Everyone had assumed they died, lost to Timberwolves on a fateful night. But what if that wasn't the case?

A story which takes place immediately following the Changeling reformation. A commission for Sunset_Shimmer83!

Discord is a cocky, overbearing, goofy free spirit. Anon is a cocky, brutally honest, nonchalant free spirit. Both can be incredibly big douches when they want to be, but the girls still like them both even with their flaws.
But one day, Anon finally meets Discord. And he decides he doesn't like him.

This story is a sequel to Words of Advice from the many worlds of Twilight

Princess Luna had heard of Twilight's experiences in meeting other versions of her in various dimensions, but one of those experiences has utterly broken her older sister to the point that she shuts herself out from the world. Determined to help her sister, Luna goes to Celestia to learn what has happened. Princess Celestia, in turn, tells Luna of a world where another version of her brought nothing but death and suffering to not just their own people, but to so many others in an attempt to convert an entire world.

*A sequel to a chapter in Joe Toon's story Words of Advice from the many worlds of Twilight which I recommend reading. This is canon with the NegotationsVerse btw.*

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.

Rainbow Dash has always been an incredible fighter, the best in Canterlot High and the region, but when a new student shows up, she struggles to keep the title. Even more surprising, however, is that the student is a boy.
Anonymous is different than every guy Dash has ever met. Strong, confident, and more than capable of handling himself, it's no wonder Canterlot High's star athlete has taken an interest in him. When he shows her just how strong he is, however, it shakes Rainbow Dash to her very core.
With a desire to reclaim her title, Dash throws everything she has into defeating Anon, wanting to prove her strength and earn Anon's respect. Yes, his respect, and nothing more...
(RGREqg)

This story is a sequel to Schadenfreude HATES MAGIC

Schadenfreude has always played by the Rules of the Game. Break a rule on the list? Get a punishment. Break four? Well.

Twilight Sparkle, on the other hand, was new to the Game, although familiar with the players. Which she really should have thought about when she tricked Schadenfreude into violating multiple rules on the list at once.

So for Schadenfreude, it was a month of community service. For Twilight Sparkle? A trial by fire of working side by side with her new employee.

And the School of Friendship's newest substitute teacher.

This story is a sequel to Schadenfreude Does a Thing

Schadenfreude does not like magic. Whenever it shows up, he gets hurt. Now, he has his own, personal curse to deal with, and had no one left to ask but the Rainbooms.

Who, if they can stop laughing, are more than willing to help fix his problem.

Oops, sorry. Hers. His? It's complicated.

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

Shortly after Twilight’s ascension to alicornhood, Ponyville receives a guest from the wolf packs of the Packlands, the diplomat Swift-Pad, who has come to meet Equestria’s newest princess and teach her a few lessons of his own.

Another work with Vinylshadow and Purrs (Chapter One) and Anon and Tangent(Chapter Two upwards)