Celestia's worst nightmare had come to pass, her faithful student, Twilight Sparkle has fallen to the dark side. Dethroned and severely depowered, she seeks help from another universe that never suffered her world's tragedies.

Based on 'Injustice: Gods Among Us', inspired by Mr Astounding's 'Disharmony: Gods Among Ponies'.

As they awoke, they found themselves in a video game like simulation of the planet Earth. All of them were from different worlds. Many found themselves in strange new bodies.
Now, scattered across this virtual landscape, the Elements of Harmony and their friends will have to solve puzzles, fight against gods and kings, overcome great obstacles and forge alliances if any of them want to see home again.

This is an SAO style adventure done in the style of a mega-crossover. Every 'player' is taken from a work of fiction. Such works as...
Batman '66
Equestria Girls
My Hero Academia
My Little Pony
RWBY
This list is subject to expand as the story progresses.

Bright Mac and Pear Butter, newly married stallion and mare.
This story follows the first day after their union.

The night time wedding leads to cuddles under the stars as they come to terms with the Pear family's exit from Ponyville.

The following day, Pear Butter does her best to settle into her new family. They also have fun getting to know each other more as husband and wife.

A cute and cuddly story with a bit of spice.

This story is a sequel to I Love Being a Rainboom

Baxter Stockman is back and he's formed a new alliance that involves a world full of digital monsters. As Karai calls on an old friend, a group of kids come through with partners of their own. Coming together, the heroes will face new enemies and get ready to shine!

Featuring OCs by me
With permission by Wildcard25

Fighting with the inner darkness inside his heart, Sora starts to wonder if he is really fit to be called a keyblade wielder.
Well this all comes into question when he wakes up in a strange new world, filled with people that he has never met before, and with signs of evil planning to attack Sora has little time to think. Will Sora become the hero of light and stop this evil from taking over, or will he cave in to the darkness that resides in his own heart?
Everyone's a human. Unicorns can use magic. Pegasi have wings.
Green means play. Red means stop.

This story is a sequel to Pokémon: Equestrian Adventures

A darkness threatens the world of Pokémon, and only the strongest of trainers has what it takes to stop it. Flash Sentry and his friends have been chosen, entrusted with this task by the Legendaries of Equestria. Not only must they fight to protect their home, they must also train in order to fulfil their dreams and desires. As the Equestria League approaches, one question is on everyone's mind: Who will be the Equestrian Champion?

Edited by KingJoltik

On TvTropes

Sora and his friends have beated Xehanort and the Organization. In using the power of waking, Sora had disappeared. He is now in the land of Equestria, now he must fit into this new world filled with the Magic of Friendship.

Follow the adventures of two foals. Go and Catch Star with their classmates in Fluttershy's school. Everyone has a big dream and wants to make it come true, to achieve it both must discover the secret world of Pokémon.

Hearth's Warming is just around the corner, which for Quibble Pants presents a bit of a dilemma. It's his first Hearth's Warming with his new family and he's desperate to find a good present for Wind Sprint.

Once again he decides to call on the help of his friend Rainbow Dash, this time paying her a visit in Ponyville in the hopes she'll be able to help him out. And lucky for him, his friend has some time to spare.

Can Rainbow Dash point Quibble in the right direction again? Or this a dilemma that Quibble will have to figure out on his own?

After a freak accident happened while saving their worlds, a blue hedgehog and a cyan, rainbow colored mane pegasus meet and find themselves in a new dimension called Earth! In order to survive in this world, they will have to work together to find their missing friends, as well as the Chaos Emeralds and the Elements of Harmony! And with the help of two human siblings Christopher and Katherine Thorndyke, AKA the Thorndyke siblings, they are in for one hell of a ride! However, troublemakers from their worlds such as the evil genius Dr. Eggman and the mad scientist pony Steam, are also here to cause trouble for our heroes! Who will come out on top with the Emeralds and the Elements? Find out in this exciting adventure in Sonic X: Friendship is Universal!

A/N: The MLP side is an adaptation to Super Writer's fan game Curse of The Lost Kingdom. All credit for the original characters and elements from the game goes to him.