Brill Building points to this page of my little ponies made to look like members of the Justice League. It even features two Booster Gold ponies. And they talk to each other.
Um, there are also Sailor Moon and Final Fantasy, KFC, and Borg (I’ve linked to this before) My Little Ponies.
And of course there is a My Little Pony Library, complete with an alphabetical index of my little pony names.