Twilight Sparkle asks Starlight Glimmer to be the guidance counselor for the School of Friendship. Starlight, understandably, needs time to process this. And maybe a few strong drinks.
Azurite never imagined that joining the Royal Guard would land her in a relationship beyond her wildest dreams, but she soon discovers that love is only one of the elements necessary to keep ponies together.
Azurite is a pony relations warrant officer for the Canterlot Palace. It was supposed to be a relaxing change from royal guard duty, but that idea falls apart when her heart is pulled in two different directions... toward a stallion and a mare.
A crime wave is gripping the sleepy town of Apple-Morepone. Then "Rainbow" Dash of the City Watch meets a batpony (adopted) named Carrot. The town will never be the same. (An homage to the City Watch of Terry Pratchett's Discworld novels!)
Twilight thought she'd had enough excitement for one day after meeting her human counterpart. Or so she thought until she was met with the uncanny feeling that Pinkie Pie was acting, well, a bit too equestrian.
Sunset Shimmer, practitioner of friendship, twice savior of Canterlot High, alicorn. She's offered to help Twilight's new student as the whole group travels to the Crystal Empire for a Crystalling. Should be a relaxing, stress free trip. Right?
Most ponies have relatively benign problems in their relationships. Small arguments, things like that. When the universe itself begins to meddle in Applejack's love life, both her and Rainbow realize it isn't going to be as easy as they thought.
Sunset Shimmer and Twilight Sparkle have a few drinks together... Okay, maybe more than a few. This is followed by a desire to do some science. This simultaneously goes much better and much worse then the girls would have expected.
Sunset Shimmer's apartment is invaded by a giant, cosmic eyeball, which is generally kind of a bummer, and almost as annoying as the constant advances Twilight keeps making toward herself.
Rarity has a hypothesis: color synergy between lovers' coats increases the odds of a successful romance. Twilight is good at testing hypotheses. What's that? Test it themselves? Nah. They're gonna make Rainbow Dash do it. (RariTwi)
Twilight and Minuette are perfectly happy and just want to be left alone. Unfortunately, Ponyville is particularly prone to mysteries and disasters, and -somepony- has to deal with the mess.
After experimenting on her schoolmates' magical music abilities, Sunset Shimmer is haunted by glowy pink butterflies. Surely there's a reasonable explanation for this. Surely.
When five foals asked Princess Twilight Sparkle to please try and paint the moon purple, she only agreed because she thought she couldn't do it. She wished she had been right.
Limestone Pie faces her ultimate test when a horde of singing, dancing, edgy red-and-black bat-winged alicorns attempts to pillage her farm. No, seriously.
Rainbow Dash makes the mistake of showing Twilight her Daring Do fanfic, and gets lectured about the proper use of dashes. This is followed by the worst pun in the universe.
It turns out that Sunset Shimmer's final letters to Princess Celestia before her exile were not filled with resentment or remorse. There might have been a lot more frantic running away involved. But it was definitely not Sunset's fault. At all.
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.)
Celestia likes her routine. Tax reforms, grants, laws and construction projects are all a princess needs to be content. It's just her luck that for Pinkie Pie, "content" is not nearly enough.
In an alternate world, someone could love a thousand different people. When the portal malfunctions, Sunset finds herself stuffed full of memories from her alternate counterparts. Memories of being in love with all of her friends.
After the student body of Canterlot High is swayed by yet another surprise musical number during lunch, Sunset Shimmer muses the students are easily influenced by songs at this time. Pinkie quickly comes up with a song of her own.