A young girl, having been robbed of her childhood and very life by illness finds herself given a second chance in a strange world and with an even stranger body. With a new life, family, and even a brother, she tries to cope with the bizarre world she's found herself in while also trying to embrace her role and become worthy of the gift she has been given.
Being a princess can be hard however, even if it's only an honorary title, especially when you're the twin sister of Prince Blueblood.

Warning, very slow burn.

After a freak accident, Princess Celestia finds herself in a whole new universe. As she seeks a way home, she is captured by none other than Team Rocket.

Welp.

Now on TV Tropes.

I don’t know if I’ve truly died or lost my mind. What is reality, what is sanity? Are they not just a product of society, a unit to be measured? Something that can be judged, evaluated, and constricted by belief, but also something that is limited by our very biology? I’m not really sure, yet I believe myself to be sane, and have decided to embrace my own reality. One born purely from thought, bound by the limitations of my imagination. This… is a tale of ”my” reality, my triumphs, my mistakes, and the sins of a father.

What the buck?!?!?!??
Sunset wanted to scream as she stared at the mirror. She was an alicorn, a freaking alicorn! Wait, what? Celestia is her mother? And did the sun deity really just said her little sister Twilight waited at the breakfast table?
Having a total overload, her brain decided to make an emergency restard. Sunset fainted. {Will include EG}

I've had this idea for a while with Sunset and Twilight being sisters. I'm sorry, but I couldn't make the beginning any better. Future chapters will be longer and hopefully better written. Tell me what you think about the General idea.

Trying to patrol the dreams of every pony in Equestria can be stressful. To ease her burden, Luna retools the Tantabus to turn nightmares into good dreams instead of vice versa. Aware of her mistakes from last time, she tests it out thoroughly, making sure there are no unexpected behaviors. And as far as she can tell, there are none.

Except that it's started calling her "Mom".

Faced with the prospect of possibly creating life, Luna seeks out Twilight's advice and assistance. With a little luck, they can get this all sorted out before the sun rises.

When Sunset was just a filly under the tutelage of Princess Celestia, she developed a powerful crush on her mentor.

It didn’t end well.

Years later, Sunset is older, wiser, and ready to finally reconcile. But as she’s prepared to put her past behind her, Sunset finds out with growing horror that some feelings aren’t so easily forgotten.

There's a new mare in town, one that's been hanging around with Stella a LOT. What happens when one of Stella's friends starts wondering who she is, and then gets three other friends to wonder who she is too? Well...that would telling wouldn't it?

All Next Gen characters are the creation of Faith-Wolff.
Edit: Coverart Pic created by Faith-Wolff, thank you!
I read all the interactions and this just popped into my head, had to write it.

After the Friendship Games, Sunset feels it's time to return home.

Only when she gets there, Twilight's castle is nowhere to be found, Cadance just got her horn, and Princess Celestia is still calling the bacon-haired pony her prized student rather than a failed one. And just reliving her past isn't on the table thanks to a pair of wings Sunset seems to have sprouted upon her return to Equestria.

With Sunset being back before she's supposed to, will the world stay as harmonious and on track, or will everything go down in flames as Sunset has to deal with allegations that she's really a changeling in disguise, a nerdy stallion with blue hair that wants to be her coltfriend, a pretty pink princess in need of remedial magic lessons, and an annoying purple pre-teen pony that will absolutely not go to bed without first being read Starswirl's Complete Mystical Mysteries Compendium?

Only time will tell

A mother will do a lot for her child, even give them up if it meant them having a safer life growing up, despite the obvious pain that comes for the parent.

That pain is something Queen Chrysalis has gone through for eighteen years, but now the time is upon them, and she wants her daughter back. Even if that means invading Canterlot during a royal wedding.

Edited by RC2101_Copey
New cover art was created by the talented Jesuka
Now has a TVtropes page: http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/Change
Go watch the reading by Skijaramaz: https://www.youtube.com/watch?v=Ecqtu_Djrw4

(Featured on 18/10/2015, the first day! Thank you!)

Change is now a printed book, information here: https://www.fimfiction.net/blog/732008/i-got-a-thing-change-is-now-a-physical-book

[This story has been rewritten, link to it is here ]
Canterlot is getting ready for the wedding of the century, Princess Mi Amore Cadenza is marrying the Captain of the Royal Guard and part of the draconic royal family will be in attendance. In addition to helping prepare the most high profile wedding Equestria has seen in living memory, Celestia has tasked Sunset Shimmer and the rest of the Elements of Harmony with befriending the future queen of the Dragon Empire and her entourage, the first Sorcerer the Empire has ever had. One thing is certain, this will be a wedding that nobody ever forgets.
(New description has be made by none other than DoomManta)

(Story has been inspired by This picture) Go check out the person who did it Zig-Word

New cover art is drawn by http://akerabronzpaw.deviantart.com/ It may say a different name but same person.

Note to all: This story has been made before the season 6 ep 5 "Gauntlet of Fire" was made but may have some details about it. ;)

Also this story got Featured, a lot... thanks everyone xD