The heroic life isn't necessarily glamorous. Ben didn't get to fight the most recent alien to pop out of a pocket wormhole, because it collapsed shortly after arrival. The weird quadruped (a hand at the end of its tail, eyes where its nostrils should be) is currently doing nothing more than sleeping the trip off. But the Plumbers need to know what it's doing here -- and as long as it's asleep, there's only one means of interrogation available. Which requires using one of his least-favorite forms, but... that's the heroic life for you.

It's just that someone's already invaded that alien's dream.

And she has no problems with telling Ben how bad he is at it.

(Now with author Patreon and Ko-Fi pages.)

Red Vs Blue Xover!

Church, the Alpha, was fairly sure he would die when he went to confront the Meta. Dead or not, he didn't expect to wake up in a forest, and not as a horse. A horse with a horn, wings, modified armor, and mounted firearms- but still a horse. Because he refused to call himself a pony, no matter what the locals said or how much Tex teased him! Now he just has to try to save his fractured mind. The AIs, luckily or not, are there to help him as they explore this new world.

Meanwhile, his loud and painful(for him) entrance into their world has brought a great amount of attention to the mysterious being that is now wandering through Equestria. The ponies best tread carefully. After all, the Alpha's "pack" can be protective.

May be Harem/Marem/Herd.

PS The Dark tag is mainly for Alpha Church's canon back story.

The planet of Chikyu is pretty odd, from an outsider perspective. There are anthromorphic sapients of every stripe and sort, the world president is a dog, its greatest warriors are alien monkeys, the average IQ (outside genius scientists or children) is somewhere below 50, and magic orbs raise the dead. How much difference would adding a pony that barely talks really make?
...quite a lot, apparently. Just ask Mr. Popo...if you dare.
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Dragon Ball Z Abridged crossover
Edit: Cover art by CaioCoia.
On DA: https://www.deviantart.com/caiocoia

Unhappy that her future as a member of the monarchy is denied by Celestia, Sunset Shimmer escapes through Starswirl's mirror into another world, planning to take it over to prove once and for all she was fit to rule. What she didn't expect—besides a species change—was to arrive in a world already conquered.

TvTropes Page (Just created! Needs Help!)

Art (Will contain spoilers)

Sunset Shimmer - Bloody Sunset

Spoilers Ch. 11+: Angel - Angel and Sunny
Spoilers Ch. 18+: Princess - Comic
Spoilers Ch. 121+: Alejandra Acevedo - Flying at the speed of death
Spoilers Ch. 161+: Apple Bloom - Bloom
Spoilers Ch. 180+: Food - Sunset's Party Dress
Spoilers Ch. 185+: Fugue - Fugue by Rametep
Spoilers Ch. 197+: Exhausted

(Art is always welcome!)

WARNING: CONTAINS SPOILERS FOR THE WHOLE STORY: TIMELINE

Seven hundred years ago, Princess Celestia lost her daughter to the human world. She went mad, deciding that humanity must pay. She crossed the dimensional veil and thus the Solar Tyrant began her war. She did the unthinkable, bringing Equestria to Earth, destroying one world in the process and nearly destroying another.

However, neither Princess Luna, the Bearers or their allies could stand for this and so they waged war against the Tyrant, quickly moving to aid humanity. Technology met magic, and somehow, humanity survived.

Now Sunset Shimmer has reincarnated...into a world full of chaos and strife. And the only way to end it is to kill the one responsible - her mother.

No one ever said a hunter's job was ever easy.

EqG/The Conversion Bureau/Destiny crossover.

This story is a sequel to Changeling Space Program

Twilight Sparkle's experimental interplanetary drive has malfunctioned, stranding Starlight Glimmer, Spitfire, Cherry Berry, a changeling and a dragon on a hostile planet in another universe. With limited food supplies, very little magic, no communications with home, and no way to leave the planet, they must survive until somepony rescues them.

Fortunately they crashed right next door to another creature with the exact same problem- a creature named Mark Watney.

They're going to science the buck out of everything- and do whatever it takes to survive Mars and get everybody home.

TVTropes page here! Thanks to GymQuirk for making it!

Commissioned art and fan works from the readers! Thanks, everybody!

This experiment in an updates-daily story was made possible by a generous grant from Canary in the Coal Mine and viewers like you.

(Sex tag for crude talk about sex, but no actual sex in the story.)