Prompts! Halloween and rare pairings

[harborshore]

I have a tragic affection for rare pairings and gen, especially if the latter is female-centric. Yes, I know, this is a surprise to absolutely no one. I say tragic because there is never enough fic to read--and it's not that I don't like the major pairings; for instance, I hold a great deal of affection for Frank/Gerard (the pairing that got me into this fandom in the first place). But right now I feel like writing rare pairings.

So prompt me, if you will: a rare pairing or gen--bonus points for involving femmeslash or really wacky crossovers, but, like, Ray/Mikey is also always fun. I assume most of you are familiar with the fandoms I write (MCR, MSI, other bands work too, BTVS, Veronica Mars, DCU...) and you also know I welcome a challenge. Oh, and give me a Halloween-related prompt, please.

ETA: I reserve the right to stop when I want to, as usual. But for now, carry on, carry on. *grins*