[WARNING: Contains ear scratching, belly rubs, and blushing cheeks] Anonymous is sent to jail for his most heinous crimes of bullying in the second degree, there he meets a mare working as a prison guard called Cookies 'n Cream.
A simple Tunneler drone is catapulted from Equestria during the infamous Wedding onto earth. Confused, injured and alone, the drone must figure out how to survive with the whole world watching. (Changeling on Earth, Xcom, Men in Black and SG:1 Xover)
Equestria has resources not found in any other dimension, so of course an alcoholic, mean-spirited scientist would get in on that and drag his grandson along for the ride.
June, 1867: Idaho Territory. An abandoned, wounded traveler comes across what has to be the biggest mare in the world. Both human and equine are searching for something -- and without each other, neither may ever find it. Or survive...
Derpy and her daughter Dinky have to fight their way through zombies and even the army by the sides of the four survivors of the zombie apocalypse in search of an escape.
What happens when the Reds and Blues finally get Church out of the Epsilon unit? Caboose decides he wants a turn in the unit, of course! What happens next? Well let's just say he always did say he wanted a pony, now he has a world full of them.