Luna has had enough of Celestia's games, and has found the perfect means of revenge. Using a long-forbidden spell, she transforms her sister into little more than a small filly, all so she could pull the greatest prank ever. Unfortunately, she soon learns that before you fool around with dangerous magic, you really need to read the fine print...

A sequel can be found here.

When a spell goes wrong, Twilight finds herself and her friends... as stallions! Will they be able to reverse the effects and return to their normal lives?

Spanish Translation by SPANIARD KIWI: https://www.deviantart.com/spaniard-kiwi/art/Runa-63-1000350600

It had to happen eventually.
...actually, no. No, it really didn't.
Set immediately after the events of Boast Busters, Trixie finds herself in a quandary when she realises that she has left her purse behind in Ponyville. She faces a humiliating walk back into town to pick up her money.
Before she can turn back, however, she meets a magical, sentient pine cone... sigh. Okay. Here's a proposition.
If you can make it to the end of this story without going "what" even once, you win a free internet.

Princess Celestia and Princess Luna. Immortal rulers of Equestria, shepherds of the Sun and Moon, and arguably the most powerful beings in existence.

Even they are not immune to the dreaded rivalry that comes between sisters. Feeling her sister has gone soft over the millenia spent alone, Princess Luna challenges Princess Celestia to the one and only Iron Pony Competition.

Which sister will come out on top?

Now with fanart! By Soulite1110

Applejack is known for a lot of things: being honest, being strong, loving her family... apples. But the thing she's most known for is having a really incredible set of eyebrows. It's for this reason that Celestia has seen fit to bestow upon Applejack that highest of honors. She's going to make her a princess... of eyebrows.

It takes less than 24 hours before Ponyville is literally on fire.

You can thank the last Seattle's Angels Podcast this time.

This isn't where I belong. I left all this behind years ago, moved on with my life. But a mare from my past brought me back, and now she won't let me go. So I'm stuck here, trying to make the best of it with ponies that don't understand me, don't even like me. But when something moves in the darkness, and when things go wrong in the cold, dead night, they'll turn to me to try to set things right.

Why? Because once a police pony, always a police pony.
~~
This is a spin-off story to 'Why am I Pinkie Pie?!', and will contain spoilers for that story, but it's not necessary to read that story to understand this one.
Cover art by the talented Conicer
Need more Cinnamon Swirl? Merlos the Mad wrote a fanfic of this story!

There is now a side-story: A Hard Day's Nightmare Night

The sequel to Wayward Courier. Read that first, or you'll get lost.

Two months after his first visit to Equestria, Thomas has returned. And this time, he's not alone!
Now the ponies have to deal with not only him, but a depressed snarky ex-Scribe and a Brotherhood Ghoul with her own list of incredible achievements and emotional baggage.
However, things aren't well in Equestria, as they quickly find out...

All major details relating to Season 3 are non-canon to this fic.

Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Twilight and friends learn that prolonged exposure to the power of Pinkie Pie can cause some rather interesting side effects. An unbearably silly idea that wouldn't go away until I wrote it down.

Princess Celestia sends four adults ponies out into the world. They find that just because it's not your destiny to save the world, doesn't mean a goddess won't ask you to do just that. This story follows the tale of Pokey, Redheart, Cheerilee, and Medley as they find out what it means to sacrifice for the greater good of Equestria.