This story is a sequel to Twiley takes Shining Armor to LineCon

After years, Princess Twilight's finally visiting LineCon again. And she's bringing some of her best friends with her. This will be the best con ever!

This story is a sequel to Twiley takes Shining Armor to LineCon

What began as a normal day for Pinkie Pie quickly takes a turn for the weird, when she is invited to LineCon by Twilight Sparkle.

Luckily, entertainment is provided.

Originally written as an entry for ocalhoun's big 250k contest.

A little filly Twilight Sparkle takes her brother to visit one of her favorite conventions. He might not survive.

Based on this story:
Twilight Sparkle Takes Pinkie Pie To LineCon by silvershinepony -- A fun little story that changes the meaning of 'line'. Recommended if you like one-liners.
Linear Transformation by SilverAlchemist -- Recommended if you liked this story and want more.

Twilight and Fluttershy decide to test their diapering skills on Rainbow Dash during one of their sleepovers.

Cover Art By: Kogoreus

(Do not continue reading if you do not approve of diapers, diaper usage, or adult baby themes. If you do not like it or are under legal age, please do not keep reading.)

Starlight reads letters from her loved ones.

Inspired by a conversation with Tired Old Man who wrote one of the letters which got me started.

Sometimes, an inter-dimensional being of great power just barges on in and messes with you. De-alphabetize your bookshelf, eat all your snacks, change your species, the sort. And I was having such a relaxing night too...

Here I am in an afterlife, of sorts. But somewhere along the way, I lost a large chunk of my real life.

There’s only one being who could have reasonably pulled any of this off. There’s a problem, though. She doesn’t exist.

Yet.

Written for the December 2016 Writeoffs, where it placed sixteenth. Caution is advised.

This story is very non-canon Optimalverse, and should therefore be approached with even further caution.

Note the self insert tag. Blatant wish fulfillment ahead. Did I mention caution?

This story is a sequel to A Stitch in Time

Having discovered the message left for her by Star Swirl the Bearded in the distant past, Twilight once again finds herself caught up in the middle of a struggle against forces far greater than herself. In order to even stand a chance she'll need to travel further and wider than she ever has, and forge some unlikely alliances with old enemies. All to bring down the powers that have manipulated and shaped her entire life, and retake control of her own future.

The conclusion of the Time Loop Trilogy, which began with Hard Reset
Available in Spanish thanks to dgs1993
Series TV Tropes page

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

An unlucky man is stuck in Equestria. He needs some new clothes, and what better place to go than Rarity's boutique? She wants a favor in return, though...

Contains: transformation, nudity and genderswap