Beyond Earth and beyond the Universe within which Earth exists there is a place full of love; the richest mine of love that can be found, as it is seen by those capable of utilizing it...

Within that place, specifically a part of it called the Everfree Forest, awakes one such creature: a Changeling; specifically, a Changeling who had been a human on Earth the day before. How will he survive in a body that literally needs love for nourishment, while in a world that is now wise to the Changelings' tricks and has branded them evil? Better question: Will he be able to change more than his physical appearance?

These questions are not the only thing that will plague him, for the hows and whys of his arrival and transformation are in a hurry to reveal themselves, and Equestria's heart will stop as it waits for its fate to be decided.

Now with a side story (with more to come) from other characters' POV!
POV: MANE SIX

Lemon Dreams is a happy pony with a perfect life in Ponyville. There's only one problem - she thinks she's a lemon.

Is she really a pony-shaped citrus fruit, or is she just crazy? Does it even matter? When Lemon Dreams finds herself at odds with the ponies of Ponyville and pursued by a strangely familiar ghost, she realises she must discover the answers to those questions before it's too late.

You'd think that being trapped in stone would mean that, if nothing else, I could get some peace and quiet. Unfortunately, it seems that Celestia has other ideas.

She has appointed these ponies... these 'Keepers', as she calls them, to keep me entertained during my incarceration.

Honestly? I'd prefer the boredom.

Cover art by matrosha123
Spanish Translation by SPANIARD KIWI found here

The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2

Cheer up, Twilight. It's not every day somepony changes species. In fact, no pony has ever changed species. It's something new and you like discovering new things. Granted, Equestrians don't like new things, especially things that fundamentally alter their government. So maybe there is reason not to be happy after all.

[Complete] Celestia awakens to see an empty world, white sandstone stretching the horizon. She wanders the world as she builds it from her imagination, filling it with life, but as time passes, the world that she created begins to seem like little more than a lucid dream, conjured from the dust.

Bon Bon's voice is funny, and that's about all that anypony who meets her notices, as her marefriend Lyra soon steals the spotlight with her explosive personality, strange obsessions, and curious beliefs. And why not? Bon Bon is, after all, a perfectly ordinary, boring pony in every way but two: her voice, and the carefully kept secret that she isn't really a pony.

(Edit:) Now with an annotated version, courtesy of the incomparable Shoggoth Lord!

This story is a sequel to My Little Heartbreak: Creativi-Tea

For the whole of April, Heartbreak has been confined to the library under Twilight’s orders. By the time May starts, being cooped up is starting to give her a serious case of cabin fever. Heartbreak wants some open space, some fresh air and a bit of grass under her hooves. Twilight wants Heartbreak to learn a bit more discipline and honesty about things. The two would butt heads, but Twilight finds a compromise.
Send her off to help Applejack with the first season’s apple harvest!
But how will a pony like Applejack, whose motto is, “Honesty is the Best Policy,” deal with a pony like Heartbreak, who has wrapped herself up in webs upon webs of lies just to cope with her situation?

This story is a sequel to My Little Heartbreak: Heartbroken

It's a week later, and Twilight is nagging Heartbreak into learning more about herself and what her special talents really are! Heartbreak shows herself to be the artistic type but with learning to be a pony and contending with ponies curious about the new mare in Ponyville, it's a rocky start that is leaving Heartbreak feeling more than drained of her ability to express herself. Let alone learn how to use a pencil with her mouth. Perhaps Zecora can help with a special brew she calls "Creativi-Tea"? Or will this just going to lead to a lot of Insani-tea?

When it came to matters of the heart, Anthony just couldn't win. In his path, a rainbow coloured trail of broken hearts were left. With the final relationship he had, his strange exes decided they had enough. Now crashing through the universe and robbed of everything that makes him who he is: Anthony has been abandoned, branded and renamed by his exes. Find out how a pony named HeartBreak has to learn -her- place in this new world.