The POV of the five ponies who find the world is not the world they remember, nor the one their cutie mark is telling them. They were happy with their cutie mark before, what's changed? And how each of them got their cutie marks.
Queen Chrysalis accidentally Reformed, and now needs a vacation to sort things out. Ocellus and Smolder are summoned by the Cutie Map to solve a friendship problem. Surely these two things are unrelated. Surely.
When Twilight takes in the wounded Trixie to nurse her back to health, she sets the showmare on the difficult path of learning to trust. 'Twixie' romance/adventure story, set a few weeks after the events of 'Boast Busters'.
It was a simple bet. Spend one month as a pony, and prove to Celestia that he had been right all along. Discord never thought he would actually enjoy it. As the days pass, he finds himself desperate to keep up the façade a little longer.
Pinkamena, Fluttershy, Sparks, Rock, Applejack and the Awesome and Stupendous Rainbow Dash are back home again after their time in the other Equestria. Now to defeat Nightmare Moon and bring back the sun here too which should be simple enough, right
Celestia decides to attempt to reform Discord, so she taps a pony with a similar background for the job. ("Keep Calm and Flutter On" as it occurs in the Petriculture AU.)
In this story spanning five parallel universes, the Mane Six get shipped in every possible way. That's fifteen combinations! It's not just romance, though - there's actual substance and story behind these pairings.
Discord’s lack of empathy and a pony's sensibility has been tolerated by Celestia, but while both the princesses and the bearers of the Elements of Harmony struggle with even more dire problems, Discord is forced into a lesson of his own.
With Celestia gone, and all of Equestria in disarray, it’s up to Prince Blueblood to set out and find her. In a harrowing journey, he will suffer, he will bleed, but will he find who he is looking for?
Vinyl Scratch and her donkey companion must reach an onion hidden beneath Canterlot palace before it's too late. Unfortunately, princess Celestia and her swarm of guards aren't too keen on letting them in.
At long last, the wedding bells ring for Applejack and Fluttershy. Everypony does their utmost to try to make it the best wedding ever, but as the pair discovers, it quickly becomes a question of getting married despite, rather than because of this.