This story is a sequel to Sonic The Hedgehog x My Little Pony: Make Your Mark - Season 4

When Opaline finds a fragment of the destroyed Paradox Prism, she gains the power to travel across the multiverse and cause chaos across all the realities. Now, the fate of the whole Multiverse, and the definitive battle between the light of the day and the darkness of the night relays on Sonic's hands and Sunny's hooves.

This story is a sequel to Sonic Frontiers x My Little Pony

Six months after Sonic's adventure on the Starfall Islands, Dr. Eggman prepares his brand new weapon to take over Equestria, while Opaline remains silent in the shadows with no sign on being ready to make her next move. However, as Tails begins to search the two villains in order to test himself out, Sonic hallucinates with a figure he thought was defeated, yet has shown up more than he'll like them to.

This story is a sequel to Sonic The Hedgehog x My Little Pony: Make Your Mark - Season 2

After his last plan failed, Dr. Eggman discovers an ancient technology on the Starfall Islands and installs his AI program Sage to hack in and take over. But there is more to this technology than he realizes, and unintended consequences immediately come to bear. Meanwhile, Sonic finds himself all alone on one of said islands, after flying into a wormhole with Tails, Zipp and Sunny. Now, separated from his friends, he has nothing but an AI voice guiding him to collect the Chaos Emeralds, not knowing that darker forces are behind him and his powers.

This story is a sequel to Sonic The Hedgehog x My Little Pony: IDW Comics

Misty continues to work undercover as the Mane 5 and Team Sonic's newest friend, although her loyalties may start to shift as she begins to see the true friendship she could have with these ponies. However, as Opaline and Eggman's endgame draws nearer, the fate of Equestria, Mobius, and the battle between good and evil may rest on Misty's shoulders. In the middle of this, some secrets come to light, some romances fly in the air... and some visitors from Mobius arrive to take Team Sonic back home.

This story is a sequel to Sonic The Hedgehog x My Little Pony: A New Generation

Now that Sunny Starscout and her friends - Izzy Moonbow, Hitch Trailblazer, Zipp Storm, Pipp Petals and Sonic the Hedgehog - have restored the magic all across Equestria, they're all living together in Maretime Bay, having all kind of fun adventures. And with Team Sonic and Team Dark added to the mix, things can't be more funnier!

Sora was an average teenage boy, though average was an understatement. At the age of fourteen, he was thrust into a battle between light and darkness, wielding a mystical weapon known as the Keyblade, saving worlds from creatures known as the Heartless and finding his friends, Riku and Kairi. He has saved the universe many times from the Heartless, saved Kingdom Hearts from being controlled by those with evil intentions, and has made new friends in each world he visited.

However, he fails his mark of mastery exam after almost getting himself killed by Xehanort's younger self, needing to be rescued by his friends as Riku and Kairi become Keyblade Masters. Needing more training before he can retake his exam, Master Yen Sid gives him coordinates to somewhere in the galaxy, though the information on what was there or why was unanswered, obeying his teacher. But as he was close to reaching the coordinates, his own gummi ship, which he crafted on his own while on a break a week prior to his exam's failure, malfunctions for some unknown reason and crashes into the world of Equestria.

With no way to make it back home, and Equestria too far from the rest of the worlds to contact his friends or fix his ship, Sora is stranded on this new world until someone realized he's been missing. Until then, he's going to have to fit in, his magic transforming his body into being a part of the world like in many others he visited in the past, and be patient. Little does he know that there were also dangers that lurked in this world, aside from any Heartless that may appear.

Sora's story takes place after the events of Dream Drop Distance, his adventures beginning in Equestria before the season 1 premiere of My Little Pony: Friendship is Magic.

Kingdom Hearts is owned by Square Enix and Disney. My Little Pony: Friendship is Magic is owned by Hasbro.

EDIT: Those who are new to this story, there are links in a majority of the chapters where they lead to soundtracks of Kingdom Hearts to help build an atmosphere in the story. Sadly, most of them may come up as dead links because those videos had been taken down by the YouTuber for some reason, even if there are some still active by that same person, or they'll be gone as well if they happen again. With how many chapters I've put in this story, and how many links there might be, I don't have the patience to take them down or find new links with the right music I chose for those moments if I can remember which ones. So, up until Equestria Girls: Legend of Everfree (Part 3), ignore the links, as much as I hate to say that with the hard work I've done. Hopefully this crossover will be as enjoyable without music as it keeps on going.