A RWBY alternative universe crossover anthology series inspired by the Marvel Cinematic Universe, the fanfictions Viridescent by darkfire1220, and Team STIK (Strike) by Aragon365.

Celestia is the greatest huntress in all of Remnant, inspiring a generation of young children to grow up and become huntsmen and huntresses themselves. Sunset Shimmer, among the inspired children, is a timid and quirkless girl who discovers Celestia's debilitating injury and secret behind her power, and becomes entrusted to inherit the secret power of "One for All".

Secrets appear to be commonplace at Beacon Academy as secret after secret comes to surface, making high school much more interesting for Sunset Shimmer, her team, and just about every other student in Beacon.

Greater list of this being a crossover with (in no particular order and to varying degrees) (partially incomplete due to my paranoia with spoilers and to curb unnecessary expectations):
Fairy Tail, Metroid, Marvel Comics, Legend of Zelda, My Hero Academia / Boku No Hero Academia, Star vs. The Forces of Evil, Octopath Traveler, and Fire Emblem.

A visit to the Crystal Empire seemed like a good idea until a storm demon and a unicorn from Sombra's past has arrived to terrorise the Crystal Empire. The demon has one demand.

Bring Me the Storm Rider!

But the Storm Rider isn't an artefact. It is a pony. Specifically, a certain orange Pegasus filly that sealed him years ago. Scootaloo has to reveal a magic powered secret she had along with introducing her friends to the craziest bunch of creatures in the world.

Time for the Storm Rider to return back to Fairy Tail

An entity of light summons the Fairy Tail guild to Equestria to assist the Council of Friendship in a war against an ancient evil force.

For Fairy Tail, this takes place after the defeat of Zeref and Acnologia.
For My Little Pony, this takes place one year after Twilight Sparkle became ruler of Equestria.

This is my first attempt at a crossover fanfic.

Fairy Tail is created by Hiro Mashima.
My Little Pony: Friendship is Magic is created by Lauren Faust.
I don’t own these series.

The Sidekicks, the partner of every champion to fight alongside against evil and being great friends together on other things, but sometimes it's the sidekicks turn to that will claim the spotlight when amazing things alone. Happy the Blue Flying Cat of Fairy Tail and Natsu's partner vs Spike the Dragon Equestria's Dragon Friend and Twilight Sparkles Number Assistant. Who do you think will win in a Death Battle.

Rainbow Dash, Canterlot High's Colorful Speedy Wondercolt and the Element of Loyalty. Jet, the Speeder of Fairy Tail and Proud Member of Team Shadow Gear. Two super fast people are going fight for 60 seconds to see which of them is truly the fastest and who is the most Awesomeness!

Equestria Girls vs Fairy Tail

I do NOT own Screwattack and MLP.

This story is a sequel to My Life as a Sonic OC Season 6

This covers Season 7 and the movie

All characters belong to their respective creators

Follow Zoey and her friends on their journey as they learn more about the Magic of Friendship. Together with the Mane Six, the Tokyo Five along with Danyelle and three other displaced battle against many enemies.

Extra Tags: Warrior Cats, Tokyo Mew Mew, Brand New Animal

A mare by the name of Neckroa Atomics comes across a large tome in her local library, curious about it she starts to read it and notices it's a collection of short stories, varying in length, theme, and setting.

This story is a sequel to My Life as a Sonic OC Season 5

This covers Season 6

All characters belong to their respective creators

This story is a sequel to My Life as a Sonic OC Season 7

This covers Season 8 of MLP

All characters belong to their respective creators