So, stop me if you've heard this one: a changeling queen, a homicidal flower, an extremely intelligent meglomaniac, a much less intelligent metal ball, and a mute sociopath are stuck in a house together in Ponyville...
Anon describes a board game from home, and Twilight arranges a game night to recreate it. This proves to be a greater threat to their friendship than anything they have faced.
2nd person fic where the mane six end up teleporting to Fairhaven as humans, where "you" find them.
Twilight visits her human friends again, only to find that they're currently in a large-scale war at the moment, and are caught up in the middle of it..
Henry has a body count in the dozens and nothing but questions about his past, but most of that is put on hold when he literally crashes into some weird horse dimsension.
After a spell apparently does nothing, Twilight wakes up in a completely different place, with a gun, some bullets, a tape deck, headphones, and a horde of killer robots coming after her.
Nightmare Moon won in the pilot, but then she's overthrown by Mental, so the ponies need to call in "Serious" Sam Stone to help them overthrow this new evil ruler.
Ever play Crazy Taxi? It's pretty much that, but with ponies.
Twilight Sparkle accidentally a large amount of Poison Joke, which ends up on Earth. It causes zombies.
A collection of documents pertaining to SCP-7663, including Experiment 7663. WARNING: LEVEL █ ACCESS IS REQUIRED TO VIEW THESE FILES. UNAUTHORIZED ACCESS CAN AND WILL RESULT IN DISCIPLINARY ACTION UP TO AND INCLUDING TERMINATION.
Derpy Hooves recreates a musical episode of The Grim Adventures of Billy and Mandy.
The Wonderful 101 decides to dispatch a group of Wonderful Ones to Equestria, hoping to secure an ally in the ongoing battle against GEATHJERK.
After a year of living and working in Equestria, Anon has to face the uncomfortable reality of paying taxes. Or, rather, the lack thereof.
They fell from the sky, but their fall was broken by some flowers tended to by a crystal pony. Unfortunately, this would be their downfall.
Therapist and Bones wind up in the middle of Ponyville just in time for Nightmare Night.