Earth, the year is 2065. After a wave monsters from space invaded in what has been dubbed the "First Incursion", the world created a organization to stop these vile creatures called S. M. I. L. E. (Space Monster Interception League of Earth). To train the next generation of defenders, SMILE Academy was created, and it is here that they will be imparted with the knowledge and skill to fend off any hostile threat. However, an evil has set its sights on Earth, and wishes to initiate a Second Incursion.

But all hope is not lost, for one student, Sunset Shimmer, has the power to repel this extraterrestrial threat. Using her otherworldly device, the StaRaizer, Sunset will set out on her journey as Ultrawoman Aster! Now, if only she could remember how and why she has this power...

A story of discovery, of battle, friendship, and possibly love? It's time for the universe's newest Ultra Warrior to take the stage!

This story is a sequel to Kamen Rider Unicorn

(WARNING: Spoilers ahead for those who have not finished the main story. It is highly recommended that you read that first before reading this story. Otherwise, if you have already, please enjoy!)

Graduation is almost here, and Sunset will soon begin a new chapter of her life. With the prevention of the Gaia Impact, life in Canterlot City has returned to relative normalcy...That is until Sunset woke up and found that everyone she cared about now treated her as if she was the Old Sunset Shimmer, the girl who was once feared and hated. Her friends see her as the Queen of Mean once again, and no one believes that she was ever good or nice. Not even her own girlfriend, Twilight Sparkle.

With little to go on, and few to no allies, Sunset will have to solve the mystery of how and why her friends and loved ones believe she hasn't changed. But the more Sunset looks into this mystery, the more Sunset realizes how bad her situation truly is.

The exciting conclusion to Sunset's Kamen Rider journey begins now!

Featured 8/12/2019, thank you everyone!

This story is a sequel to Kamen Rider Unicorn

Summer Vacation is still going strong for Team Unicorn, but every once and a while, even heroes need to take a break. And what better way than to play the hottest video game of the year?

However, this game becomes less fun when Canterlot City's youth contract a unknown disease that is slowly killing them. But when Sunset goes to confront this new threat, an enemy from the past returns to seek revenge on her, and on all the good in this and every world.

But hope arrives in the form of three renowned doctors and a game character - and one guy with a MAJOR god complex - who can help and stop this disease before it can progress.

Oh, and they also happen to be Kamen Riders!

< UNICORN! >

[+] MIGHTY ACTION X! [+]

This story is a sequel to Kamen Rider Unicorn

Sunset Shimmer has become burnt out after constant battles with Dopants and managing any magical mishaps that spring up. So after much deliberation, Sunset has decided to return to her home for a week long vacation.

However, evil doesn't take a vacation, and it springs up in Equestria. The organization known as Shocker, has set its sights on Equestria and threatens all that is good in the magical land. Fortunately, help appears in the form of the "Destroyer of Worlds", Kamen Rider Decade.

But what is Shocker's objective? Why have they targeted Equestria? Sunset Shimmer shall be tested like never before, against foes she has never encountered, see how her metal will be tested in Kamen Rider Unicorn's first movie debut!

Takes place during Kamen Rider Unicorn chapter Initiation

Some time has passed since the end of the Friendship Games, and Twilight Sparkle is still adjusting, but it's nothing that Sunset can't help her with. However, something seems off when Twilight starts to have dreams. Dreams of a library with infinite books, and of a masked warrior who fought against monsters.

It is soon revealed that these were not dreams but premonitions, the power of the Earth has give birth to the creations known as Gaia Memories, and in order stop those who would use their power to hurt others, Sunset and Twilight will have to work together to stop it. With knowledge in hand, Twilight will equip Sunset with the tools needed to fight this menace, Sunset Shimmer will become Kamen Rider Unicorn!

"Time to restore harmony!"

< UNICORN! >

This is a crossover of the Japanese Tokukatsu type TV series, Kamen Rider W

Apparently it has a TV Tropes page, go figure. Thanks whoever did it!

New cover art is fan art from pyropyre

And here's the theme song, Brave Phoenix

Made this to help with reading: Kamen Rider Unicorn Reading Order

This story is a sequel to MLDC Origins: The Guardian of The Green

"I was once the greatest of knights in the kingdom, I served our Queen Amore faithfully and without question. I had the love of a woman, who was my friend through childhood. I also had the privilege to learn of magic under the great Starswirl. However, I destroyed all of it, in succumbing to the darkness, used as a weapon to hurt those I loved!"

"As punishment, I was cursed, to forever live, and to forever be bound to a demon...this is how it all began."

Tree Hugger, some called her a eco-warrior, an environmentalist, and a high hippie. But they did not know the real Tree Hugger, a girl who risked life and limb for the preservation of animals and nature.

Unfortunately, she risked too much....

But nature has a will of its own, it desires a protector, a guardian. The Green has chosen...

This story is a sequel to My Little Pony: The Entities of Emotion

Four years have passed by, four years that the Entities of the Emotional Spectrum have lived amongst the ponies of Equestria and have gotten used to mortal life, for the most part, and will soon be spending Hearth's Warming Eve with their respective families and friends.

However, this Hearth's Warming Eve night will be less than joyous. The darkness of the Blackest Night has made it's preparations and is now ready to turn this night of life and happiness, into one of death and tragedy. The Entities and the ponies whom they've sworn to protect will have to stand together if any of them want to see the dawn of Hearth's Warming Day!

"Happy Hearth's Warming to all, and to all, a dead night..."

This story is a sequel to Misunderstanding

Things are going quite well for the new family of five, Stella is steadily accepting both Sunset and Flare into her life, and Sunset and Flare are starting to adjust to their new life living together in the castle. But there's just one teeny, tiny little problem...the In-Laws. Twilight's parents, along with Shining Armor, Cadance, and their two daughters, Skyla and Hope, are coming down for a friendly little family get-together, and now all Tartarus breaks loose! How will Twilight and Flash explain Sunset to them?! How will Stella explain Flare to Skyla and Hope?! Brace yourselves friends it's going to be a bumpy ride!

Consider the "Other" tag for those ponies not able to be listed.
All Next Gen characters are the creations of Faith-Wolff (story artist for The Bridge: A Godzilla-MLP Crossover)

There's a new mare in town, one that's been hanging around with Stella a LOT. What happens when one of Stella's friends starts wondering who she is, and then gets three other friends to wonder who she is too? Well...that would telling wouldn't it?

All Next Gen characters are the creation of Faith-Wolff.
Edit: Coverart Pic created by Faith-Wolff, thank you!
I read all the interactions and this just popped into my head, had to write it.