After not seeing Twilight Sparkle for years, Princess Celestia is surprised when Twilight shows up at the castle, needing a foalsitter for the daughter Celestia never knew she had. Princess Celestia agrees to foalsit for the young filly on short notice with deeper motives than a simple foalsitting job. The little filly is far from normal and the more Celestia learns about her and Twilight, the more she wishes she hadn't.

Celestia is determined to find out the truth about this young filly. But will she like what she finds?

Sex tag for the mention of sex but there is no sex.
Source for picture.

I deserve no forgiveness. If I could take it back, well... I would never have met her. Somepony who could forgive me. I think. Look, it confuses me so stop asking!

I hate him and what he did to the Crystal Ponies is something I will never forgive. So why is it that I care when ponies scorn him? When they hurt him, why does it make me cry? When I see him, why does my heart skip?

Is it just me or has Twilight gone crazy? Dude's a jerk.

Can we please change the subject?

Author's Note: Other is flagged due to the character flag limit. Expect Cadance, Shining Armor, Luna, and Discord at least!

During her entrance exam, Twilight's powers goes far out of control, leaving Celestia a shell of herself and Equestria in ruins. Now Nightmare Moon is free, but even she can't stop the Tyrant Filly. She flees through time and space, finding herself in an Equestria familiar to us but odd to her. Can the Mane Six help her stop a Twilight out of control?

Fanfiction.net link here!
Weekly featured fic in Authors Helping Authors group

TV Tropes Page, with sincere thanks to DrTempo.

Cover art from here.

(Madam Foster's Crossover) In the months since the now infamous mess her friends simply called the "Lesson Zero" incident. Twilight has been increasingly desperate to find her old fillyhood dolly friend, Mr. Smartypants.
In desperation, she casts a spell to take her to her old friend, but finds herself in front of a strange manor house painted in eye-watering colors. She doesnt' know which is stranger; these "humans" or the creatures they thought up? -And why would her beloved doll be in this crazy place...?

After the Discord incident, Twilight is feeling guilty for sealing Discord in stone.And, she is growing to have romantic feelings towards him, but they are the exact opposites of each other.

But Twilight wants to make it up to him and tries to help, unknown to her, the Spirit of Chaos and Disharmony is habouring romantic feelings for her too.

So will they both admit their feelings as they slowly become friends and maybe become more?

Mixing certain events here and there to make it more interesting and you may find out more secrets about the main pairing soon!

This story is a sequel to Renew

Weeks after being dubbed the newest Princess of Equestria, a pregnant Twilight Sparkle and her husband Discord have settled down for awhile until Princess Celestia informs them of the return of the Crystal Empire and the Crystal Mirror. They are needed in order to protect the empire and the mirror from the Empire's former leader, King Sombra.

After an unusual fight shortly after arriving there, Twilight, Discord, and Screwball are all thrown in the Equestria Girls world along with King Sombra. Now they all must find a way to get back home and stop King Sombra from trying to take over this world along with the Crystal Empire.

To make matter worse, Twilight also has to be careful with a baby foal inside her!

After the first night of celebration in Ponyville, Spike woke up to find himself as his pony caretaker, Twilight Sparkle. To add to his shock, the original Spike still acted like the dragon himself. Who was he then?

Facing with such a bizarre occurrence, the now-pony decided to go about fixing it alone, and trotted down a path of unknown.

When Twilight Sparkle had the magical surge that cemented her place as Celestia's student, the amount of power she released not only hatched a baby Dragon, it brought forth something else. Something that shouldn't exist any more.
Something that has Celestia worried.

A fluffy puppy.

[Despite the gore tag it's rather light on that, and they have yet to make a lewd tag and there's a bit of that.]

Editing help by Lawlypops, ThatNoobpony and people in the comments.

Modoc is converting this story into a youtube audio format if you'd rather listen to the story. That link is here.

Cover art by marking

Season two is live here, Season 2

After the changelings' failed invasion of Canterlot, Twilight tries to soothe some of Ponyville's rampant paranoia by casting a spell to prove there are no imposters hiding in the town. But her spell leaves her in an alien body, facing a mob of angry ponies who just don't believe her when she says she is Twilight Sparkle.

Or, at least, she was Twilight Sparkle, anyway...

Featured on Equestria Daily, 2/17/13
Cover art is by the awesome and amazing Conicer

Princess Twilight, ruler of Equestria. Yet she feels unsure how to rule her new kingdom. She has her friends, she has Celestia, Luna and Cadence, even Discord to give her advice, but it still doesn't seem to be enough. Until one day not long after her coronation, she received a letter from the unknown with an offer to meet others who might give her the confidence she needed. From who else but her selves?

This tale is a mix of homages to some of my favourite MLP Fanfiction and other ideas of my own which I'm not quite sure if I could write a full dedicated story about. There will be (possible) spoilers for both the other fics and possibly some of my own if I proceed to follow up with them.

Reader's Discretion, this Fic contains spoilers to several other Fics listed:
Change Series by tom117z
NegotiationsVerse by Rated Ponystar
Past Sins by Pen Stroke

Other stories referenced:
Bride of Discord trilogy by DisneyFanatic23
The Color Goddess by MuseScript
Princess Celestia: The Changeling Queen by vren55
A Tale of Blue and Red by Stratocaster
Steel Soul by Masterweaver