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.

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

Following the events of The Last Alicorn, a new Avatar has risen. A new generation, a new world filled with new technology, countries and factions. Can this Avatar defeat the mysterious Meadowbrook and stop her from removing everypony's cutie marks? What other threats are waiting to strike and take over this new world order?
Image by Silfoe again. Thankies. :)
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.
My little pony: Friendship is magic and all associated characters, storylines, and materials belong to Hasbro, and was made incredibly awesome by Lauren Faust.

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

This is a parody of avatar the last airbender, using ponies! Following the second book, with the Water Nation having seemingly won, embracing all the nations in its icy grip, will Twilight and her friends be able to stop them before they can unleash Discord and return his chaos to the world? With so much lost and destroyed, will Twilight be able to endure facing off against the fearsome Nightmare Moon?
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 by Silfoe

This story is a sequel to Avatar: Legend of Diamond Tiara. Book 1: Harmony

Avatar Diamond Tiara has suffered her first real victory, and in many ways her greatest defeat. Now she finds herself struggling to cope with the realization that she needs far more help than she ever thought. So she must turn to her old lives and, more importantly, Twilight. Together with her friends, can she discover what happened to her previous incarnation and, more importantly, the origins of the Elements of Harmony?

Image by Silfoe again. Thankies. :) Probably best one so far.
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.
My little pony: Friendship is magic and all associated characters, storylines, and materials belong to Hasbro, and was made incredibly awesome by Lauren Faust.

This is a parody of avatar the last airbender, using ponies! Read as the avatar, Twilight Sparkle, travels on a journey to stop the water nation's war against the world. Constantly pursued by Nightmare Moon's daughter as well as the general of Water Nation will she be able to take and complete her first step towards becoming the avatar?
Special thanks to Duelist925 and 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.
My little pony: Friendship is magic and all associated characters, storylines, and materials belong to Hasbro, and was made incredibly awesome by Lauren Faust.

Dead.

It all happened so fast. One minute they were there, and the next she was standing in their ashes.

Lost forever.

It wasn't fair. They’d devoted their entire lives to defending Equestria, and what was their reward? To be cut down in the blink of an eye. Weren't they supposed to be the heroes? Weren't they the good guys, the chosen ones, the saviors of the land? This wasn’t the way things were supposed to go!

Alone.

Twilight wouldn't accept it. No, she couldn't accept it. How could fate be so cruel? Why did she have to be the only one left alive? Why did she have to suffer on with such a terrible burden, reliving that terrible moment again and again for all eternity? No, regardless of what anyone said or did, she knew that a terrible mistake had been made, and she would see it fixed...

...no matter what the cost.

MLP/Shadow of the Colossus crossover.

Picture by Companda.

The two-part series pilot "Friendship is Magic", but with a Kingdom Hearts twist. Aspiring Keyblade master Twilight Sparkle fails her attempt at the Mark of Mastery exam. To help get her mind off her studies, Princess Celestia sends Twilight to the nearby town of Ponyville to oversee preparations for this year's Summer Sun Celebration. But the threat of a great 1,000-year-old evil looms.

(Gasp! A Kingdom Hearts crossover! It's so original! ...Yeah, I know it's been done countless times already, but I just couldn't say no. I love Kingdom Hearts; I'm not exaggerating when I say it's the only thing I love more than MLP. 'Blasphemy! Burn the heretic!' I can already hear some of you thinking. Again, I thought the opportunity was too good to pass up. And so here we are.

Fair warning: if you haven't played any of the Kingdom Hearts titles, much of this story will likely go over your head; only the bare minimum of accessibility will be given to series newcomers. Secondly, as this is a Kingdom Hearts take on the "Friendship is Magic" two-parter, Sora, Donald, Goofy, and other KH characters will NOT be appearing. I feel I should make that clear so I don't end up disappointing those of you hoping to see your favorite KH characters as ponies.

Also, if this turns out to be popular, I may do Kingdom Hearts versions of other MLP episodes and even some completely original stories.)

My Little Pony: Friendship is Magic © Hasbro
Kingdom Hearts © Disney/Square-Enix
Cover art by Akili-Amethyst

Equestria is growing, and magical savant Twilight Sparkle is disgusted by the crime and corruption this change has brought. Her life is changed forever when she discovers the Death Note, a notebook with inexplicable and deadly powers. She uses this book to pass judgement on those she deems unworthy of life, aiming to create a perfect world free of crime. But when the two Princesses put their best pony on the case, a mysterious detective known only as L, a psychological game of cat and mouse erupts between the two.
Comments contain spoilers. Artwork by blu-red, opening by Anon3mous. Now with its own TV Tropes page.

Luna Walker has invoked Protocol E: Six of the most dangerous criminals in Equestria have been hired to apprehend the Trixie Lulamoon, aka The Puzzler, who is under lock and key in Aurora Asylum. Meanwhile, Twilight Sparkle, aka Mare Do Well, has her own mission: find Discord's dirty bomb before he gets the chance to detonate it. One problem: Discord is also in Aurora Asylum.

Story based on the DC animated movie, Batman: Assault on Arkham.

Unexplained occurrences happen every day, but if you posses the Yo-Kai Watch, you will have the amazing and rare ability to see the elusive Yo-Kai. Invisible spirit like entities, responsible for life's daily annoyances. But beware.... When a Yo-Kai enters your life, things will never be quite the same....

After he gets lost in the Everfree, Spike stumbles upon an odd capsule machine in front of an old tree and after inserting a bit, he opens the capsule that comes out of the machine. A strange ghost creature by the name of Whisper comes out and introduces Spike to the world of Yo-Kai.

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My second story! This was another idea I had going on in my head for a little while now, so I am really excited!

There are adventure elements but I can't put them in due to the slice of life tag.

Yo-Kai Watch is a copyright of Level-5.