MLP Time Loops
I've been running around all day, so I'm not in any particular fanfic mood at all. Have a link to MLP time loops by Saphroneth. In over 2,000,000 words, this fimfic crosses ponies over with pretty much everything, and contains all possible plots somewhere in it's depths. The first time I read it I marathoned it in one stretch; this is not advised. But it makes a pretty good sampling platter; don't like one plot? Keep reading and another will be along shortly.