Generosity and Loyalty in Gotham, Equestria's weirdest city. And they don't know why. All anypony involved knows is it's going to be a long night.
Note: This is a farce, not a mystery. Please judge accordingly.
First (of hopefully a couple more) in the Distinguished Competitors series, an Equestria-fied DC AU. Rarity is the equivalent of Sliver St. Cloud. If you're interested in a Marvel variant, perhaps the Super Pony Roomies series has something for you.