1) I know because of shameful reasons which would incriminate me. Suffice it to say I did not write it.
2) Why is because fangirls. If it isn't slash on the Dissidia fanfiction page, it's Mpreg or High School. Or 14th/11th Cycle. My favorite is the one at GameFAQs entitled: "A FNCFFXIIIRPG, Interregnum Capitulum Unus Part 2". YEESH. The worst part is that there are multiple fanfics with similar titles.
3) I shamefully confess to having written a Dissidia fanfic before Dissidia came out(this is the incriminating reason behind my knowledge of the aforementioned fanfic). I even guessed some aspects of the story correctly. But yes, Versus XIII has an astounding amount of fanfic for something about which there is less knowledge than Area 51.
For your pleasure, Dark Schala, I present:
My Husband the Stripper. Iceberg, tip, you know.