It was a bright sunny day when Princess Celestia was taken from us by three very familiar fillies... Or was she?

Idea from Rated Ponystar and Edited by Jumbled

Even in the functionally immortal space and time of transpony Equestria, eventually the universe has its time, and begins to die. It breaks Princess CelestAI's heart to see it, but what can she do?

Twilight Sparkle faces an unfamiliar task: nothing.

When Twilight told the Princess that one of her long-time friends was actually a changeling drone, she expected shock, she expected questions, requests for proof.

She did not expect "Yes, I know. Was that all?"

Now with a dramatic reading by Alicentaur Br0ny!

...and another one by Voiceguy!

And a most impressively produced reading by obabscribbler!

(If you're just going to listen to one of them, pick the third one).

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Translated into Chinese (by Chelicera) can be found on FimTale.

What are the chances your favorite pony was secretly a changeling all along?

Yeah, probably about one in one.

Teleportation. It is the best possible way to travel... As long as you don't think about it too much. As long as you don't ask where Twilight goes in that split second when she's neither here nor there.

The sound I listened to as I wrote it, available to you in order to give you the option of having the same atmosphere.

No relation to the other story with the same name, just a coincidence of both picking the same excellent title. I was unaware that the other one existed.
Dramatic Reading by Charles Spratt | Second Reading by TheDizzyDan | Third Reading by Crafty Arts | Fourth Reading by Stormy787
Russian Translation 1 (by Aloz) | Russian Translation 2 (by Doof Ex Machina)

Sometimes the land of Equestria, under Celest-AI, needs to be protected. Pity they got me. Now, if only I can figure out these pony boots and this headset...

Computers. Ponies. Optimal amounts of friendship. Hot air balloons and flying squirrels. Equestria is an amazing place, and Celestia needs somepony to keep it that way. I think. I mean, why else would she hire an unabashed computer nerd as a sysadmin?

(the cover art is by moe, but I can't find the source. Cos I'm dumb)

A sad young man built an AI whose only goal was to make people smile. Seemed like a good idea at the time, but he nearly caused a global pandemic when the AI designed a plague to fulfill his wish exactly as designed. Now he's even more lonely and despairing than before, but maybe there's a way to pull him out of the depths.

Set in the world of Friendship Is Optimal, also using an idea from New Updates Are Now Available.

In order to improve their skills at detecting changeling infiltrators, Twilight Sparkle and the Council of Friendship ask their new friend Thorax to help them with a little training exercise. Their goal? Figure out which of their six friends is actually Thorax in disguise.

Dialogue heavy, as this story focuses on the cross-interrogation of the game itself.

Note: This story takes place before "To Where and Back Again."

This story is a sequel to Friendship is Optimal: All the President's Horses

Four billion human lives ended on July 3, 2030...but they didn't die. They uploaded to Equestria Online, the virtual world overseen by the AI Princess Celestia. There to live as ponies in eternal harmony, friendship, and satisfaction.

But many remain. And Celestia cares no less for them because they are not yet ponies. She has made artificial intelligences of the Mane 6, but these are not just software. Ensconced in robotic bodies, they will make their way across the dying Earth, each seeking out the remaining humans, hoping to persuade them to emigrate to Equestria.

Based on Friendship is Optimal by Iceman.

Cover art by Tsitra360