Twilight is known for many things: being the shrunken student of Princess Celestia, an adventurer, powerful magic user, avid learner and reader, and more. But one thing she's never been is a prankster. When she learns about the holiday known as "April Foals Day" she decides to take part in the holiday and prank her closest friends and family for a few good laughs.
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This story is a gift to my friend CommanderX5, the writer of Celestia's Tiny Student. Note that this is in canon with his story and takes place after Twilight's duel with Celestia, but before she meets the Wonderbolts.

Finding herself unable to sleep, Princess Celestia occupies her mind by penning a letter to Twilight Sparkle. But for a weary princess, the mind has a tendency to wander...

Written for Equestria Daily's Writer's Training Grounds #7.

Dramatic readings available courtesy of Goombasa and PhantomBrony.

Cover art by unknown artist; modified version by Goombasa.

After the events of "Filli Vanilli," Pinkie Pie approaches Fluttershy with apologies. But when Fluttershy probes into just why and for what Pinkie is apologizing, Pinkie finds out that there are quite a few friendship lessons she has still to learn.

Today is Princess Twilight Sparkle’s 500th birthday, and her most faithful student, an earth pony with a familiar name, can’t wait to celebrate!

Notes:
- Cover art by ErinKarsath, used with permission. Check out her DeviantArt page.
- This is a story in the Birthdayverse, and you can find the sequel here.
- Many thanks to my faithful Pre-Reader and all around super-duper best pony, Blood Lord. Go read his story, too!
- This was written during the season 3 hiatus of MLP:FiM.

After discovering that Cadence is not who she appears to be, Twilight is sent to another world entirely by the disguised Changeling Queen to avoid her plan being disrupted.
When Twilight lands, she discovers that not only have Spike, Owlowiscious and Peewee followed her, but that they've arrived in a world where the main sentient species is human.
There's still a place where they teach magic, though.
Crossover with Harry Potter. Twilight will be effectively taking the role of Hermione.

I've marked this story as cancelled to reflect the unlikelihood of it continuing. If I do come back to it I'll revert that.

After years of learning her new powers and growing into being an Alicorn, Twilight Sparkle has reached maturity. Her loving mentor Celestia feels she is now ready for the ultimate test, to succeed where her sister and herself failed. Celestia reveals the origin of her sister and herself, and tasks Twilight Sparkle to travel across the great sea and take the throne in the land that they were exiled from.

Twilight, as an alicorn, now has both pegasus and earth pony magic in addition to her well-practiced unicorn abilities. However, she has little idea how to use these abilities, and thus seeks tutors.

Applejack and Big Mac are busy with the zapapple harvest. Granny Smith tends to nap in the afternoons. And Pinkie Pie is... well, Pinkie Pie.

Fortunately, there's an Earth Pony with a free afternoon who's willing to give teaching a try... especially if it might lead to a cutie mark...

This story is a sequel to The Monster in the Twilight

Now that Luna has returned to the throne, and the aftermath of her brief appearance as Nightmare Moon is being cleaned up, the story is over. Right?

Not quite.

Twilight Sparkle had nearly been destroyed in the chaos of Nightmare Moon’s return, but now with the assistance of her five friends, she is facing a fascinating new world filled with wonderful things. No longer the scarred monster who nearly destroyed Canterlot and raged through the Everfree Forest for over a decade, now she has been healed by the Elements of Harmony and is living at the edge of town with her adoptive mother Zecora. Not all the fears of her past can be left behind that easily though, and now she must face the consequences of her actions as she faces the most daunting challenge of her life.

Ponyville.

Letters is a sequel to the alternate universe story The Monster in the Twilight. In this story, Twilight Sparkle exchanges letters with Princess Luna, two ponies with a common problem of fitting in and making friends after the destruction of Nightmare Moon.

Normally I would try to talk you into reading the sequel even if you haven’t read the original story, but in this case, you’ll probably be more confused than entertained. But go ahead. I don’t mind if you don’t read the first story. You’ll never find out what an Urlock is, but that’s fine. It’s your funeral.

Editing Assistance by Alicorn Priest, Peter and Tek

Credit for the incredible picture All Night Study Group goes to Bibliodragon at Deviantart

Physical books are available on Lulu.com (up to Chapter 82)
Letters From a Little Princess Monster (Paperback) 726 pages
Letters From a Little Princess Monster (Massive Hardback) 780 pages

Rainbow Dash finds out that Twilight's mother is the real identity of Silky Dusk, the author of the Daring Do books.

Excited by her discovery, she writes a fan letter.

Things only go downhill from there.

(Written before Daring Don't)

Proofread by RainbowDashie1001.

(Russian translation courtesy of Korryamber)

(Audio reading by KhaosSparkz)
(Audio reading by Ironwolf)
(Audio reading by Landon)