Halloween Comes Twice This Year

I like the current name, although I can see why it's a bit confusing (even just from the "Trick or Treat? In April??" point of view XD).

My suggestion for a name would be to have something generic that lightly references the Pokemon badges/achievement structure, maybe? Like:

Smut Gym
Smut Gym Challenge
Smut Gym Trainers
Smut League

Hm, actually, I like morbane's suggestion:

It's Super Ef-fuck-tive! - A Multifandom Smut Fest

???

Or slight variation on peasina's:

Make Some Moves - A Pokemon-move-themed Multifandom Smut Fest

Or I don't know if this works, but since "Pound" is the first move on the list and a pretty good illustration of the suggestiveness of Pokemon move names, maybe you could name it that, like, "Pound: A multifandom smut fest" or something. And use "poundfest" or "poundsmutfest" if you need a longer and less generic name than just "Pound."