SG-1 is sent through the Stargate as a forward scouting team for an extended scientific mission to P3X-597. Arriving in a long abandoned castle, the team heads out for the nearest village. As they approach, it becomes clear that the locals aren't exactly human. Their contact with the pony-like aliens goes well, conveniently timed alongside a celebration of the sun, until an over-the-top, hammy, evil pony appears to ruin the festivities.

A Stargate SG-1 crossover.

Twilight Sparkle, Princess Celestia's most prized and faithful student, is being sent to Ponyville to learn about the magic of friendship.

And she's not happy about it.

Hear what Celestia has to say back! Check out the spinoff:
Responses To A Disgruntled Friendship Student by keaton-furman-prower

Still want more? Have a multiverse spinoff by MixMassBasher, my contributing writer for Seasons 5-9.
Letters From Across the Disgruntled Multiverse

Editing by Neko Majin C.

Disclaimer:
The following is a work of parody, and is protected as Fair Use under section 17 U.S. Code § 107 of US Copyright Law. My Little Pony: Friendship is Magic and all affiliated characters are property of Hasbro Inc.

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Derpy Hooves is secretly a changeling.

Nopony particularly notices, or cares.

(New 9/15/19: Spanish translation by Spaniard Kiwi! Thank you!)

Each season will have three parts. Including the introduction, it will be 13 chapters.

Spring: Fluttershy sees Big Macintosh bucking apples one day, and can't possibly get him out of her head.

Summer: Sea Spray finds himself in Ponyville with a broken wing, and must stay at a house with Lyra and Bon Bon.

Autumn: A human who dies before his time is given another chance to start over in Equestria, finding a charming young wall-eyed mare.

Winter: Gilda the griffin is insulted out of Ponyville, where she is found and befriended by Alkaline Grey, forcing her to re-think her place in the world.

Heavily inspired by the "Griffin Village" album by Jackle App. This is what I think of every time I listen to them.

Thanks to Jackle App for giving the go-ahead, and thanks to Pandykissu for the awesome cover art!

To those who don't feel like reading, there's also a Fanfic Reading by Lucero the Pegasus that I found just now.