As the Summer Sun Celebration approaches, Princess Celestia sends the young Guard Lieutenant Twilight Sparkle to Ponyville to make final security and preparation checks. In Canterlot the Princess's Apprentice, Shining Armor, works to uncover the hints of an anarchist movement striking at the City's heart. When Night falls the young Princess Cadance is left trying to hold the heart of Equestria together in her aunt's absence

Something is bothering Celestia, enough to keep her up all night, every night. Enough to risk her screwing up, and revealing to all of Equestria what she is behind the facade of serene wisdom - a bizarre idiot. Thankfully Luna is on the case, determined to figure out what's going on with her sister, and help if she can, at least if they can stop bickering long enough to do that.

Possibly the dumbest Twilestia fic you'll ever read.

Sex tag is for sexually implicit dialog and situations.

In a remote corner of the Solana Galaxy lies a backwater planet called Veldin. Nothing important ever happens there. Nothing exciting, either. Ratchet, a Lombax with no idea of his origins, is beginning to grow bored with his life, and dreams of excitement. He wishes on a falling star for some excitement to find its way into his life.

The falling star answers by crashing into his home in the form of a basket carrying a tiny creature with a horn, a pair of wings, and four hooves. The name on the basket reads "Twilight Sparkle".
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Part of the PWNY-verse.

Edit: Now with cover art by the amazing G_Haze
Video Consultant/Technician: m2pt5 (he provides the infobot videos and similar.)

Edit: Game Timeline
Ratchet and Clank: Done
Going Commando: Done
Up Your Arsenal: Done
Deadlocked: Done.
Size Matters: Done.
Tools of Destruction: Done.
Quest for Booty: Done.
Crack in Time: Done.
All 4 One: Done.
Into the Nexus: Done.

[Complete! With TVTropes apparently!]
Also, apparently, an animated trailer.

In a world of brass and steam, Twilight Sparkle had thought she had made a life-changing discovery with the invention of the telescope. For better or worse, she was correct.

Now her discovery has not only changed her life, but the lives of those she seeks out in her desperate attempt to contact the only other creature as lonely as Twilight herself.

It all would have been much simpler, but it had to be the one Twilight could only call The Mare on the Moon.

Decidedly not within walking distance, then.

[Featured on EQD before story was meant to be submitted. 4/03/2015]

[Editing team: Southpaw, Wolfvenom, Maskedferret, SwanSong and BluePaladin42, without whom this story would be a fraction of its current state.]
[Special thanks to Novel-Idea for the updated cover]

Tirek is gone and so is the library, but Twilight Sparkle can't stop thinking about them. Is she playing the part she wants to play? Are her desires all the same as her mentor's? Has ascension truly helped her to spread the magic of friendship? To answer these questions she must turn to her friends, her mentor, and a more uncertain source: her heart.

A/N: This is an alternate version of events after the Season 4 finale, returning after a two-year hiatus. The beautiful new cover picture is courtesy of AquaGalaxy. Dedicated to palaikai and BrownEyedBagel for their support, plus RealityCheck, Jawjoe and StrangeReasoning for inspiration; and finally Black Hoof, without whom I may never have continued the story.)

This story is a sequel to The Wizard and the Lonely Princess

Book Two of the Lonelyverse

Having returned to the Dursleys after a highly eventful first year at Hogwarts, Harry and the alicorns had been looking forward to unwinding. As it turned out, all their hopes were for nought. Between summer shenanigans, a crazy house elf, and learning Potter family history, they've got a full summer ahead of themselves. And when they get back to Hogwarts, they'll have to deal with giant snakes, idiotic teachers, and a gathering darkness. With things going off the rails, they've got a long year ahead of them.

And if they survive that, they still got to deal with the strange power surges and dreams that both Luna and Nim have been having since soon after the Summer Solstice...

Other stories in the Lonelyverse:
The Wizard and the Lonely Princess
Hooves, Plush, and Magic: The Untold Tales
The Wizard and the Lonely Princess: Hallowe'en Special
A Nightmare Christmas

This story is a sequel to Twilight's Discovery

Recommended you read the first one.

After Twilight's trip to the Mirror Pool, Ponyville has a new toy to play with. Death.

This is an open collaberation with the rules and sign up being here.

Thank you Rated Ponystar and The Albinocorn for prereading.

Now has a sequel, One Year Later

After a vigorous day of organising and sending reports to Celestia, Twilight notices Spike is feeling a little ill. He slowly grows more and more cold, before finally falling into a coma that Twilight fears is her own fault.

Going to the Princesses for help, Twilight eventually is brought before an Elder Dragon and comes to the realisation that she may have failed as a caretaker, a friend and as an older sister.

~~~
*EDIT* Okay, okay. You guys win - I'll write an additional chapter or two. I've marked this story 'Incomplete' for now. Follow up chapter has been done. If you want more, let me know. I'm sure there are a few other characters I could write a chapter on (Except for the dragons, of course)

*DOUBLE EDIT* Okay, wow. I seriously didn't expect this to take off as well as it has. This is honestly probably one of the best days of my life. I'm so glad and happy that you've all enjoyed the story.

Every Princess has a Companion Captain, except Twilight. The position is a role with centuries’ long tradition... and intimate implications with many marrying their bodyguards. When Twilight chooses Rainbow to be her Captain, what will the Wonderbolt say? Blossoming into her mare-hood is terribly confusing for Twilight. Is Rainbow who she really wants? Will Rainbow want her?

Multiple Endings Depending on Readership!

Special Thanks to my editors!
Executive Editor IndexOutOfBounds
Editor Hyacintho Ignis

This story is a sequel to Avatar: The Last Alicorn. Book 1: Pegasus

The story is done, the battle lost. With Discord free to run rampant, will Twilight and the others be able to stop him? What cruel and twisted plots does he have in mind for them and, more importantly, what does he have in store for the elements themselves? The final book in the Avatar series starts now!
Special thanks to Angel_Bunny for editing the chapters for me
Please enjoy!

Full collection:
Avatar the Last Alicorn:
Book 1.
Book 2.
Book 3.
Book 4.

Legend of Diamond Tiara:
Book 1.
Book 2.
Book 3.
Book 4.

Disclaimer: "Avatar: the Last Airbender" and all associated characters, storylines, and materials belong to Nickelodeon and were created by Bryan Konietzko and Michael Dante DiMartino.
Artwork is by me editing the error message from Fimfiction.