The Long Buffy Halloween is a crossover fanfic between Buffy the Vampire Slayer and Batman. In this fic Xander chooses to go as Batman in the cursed Halloween episode, and Cordelia goes as Catwoman.
This Fanfic contains examples of:
- Cosmic Retcon: This fic seems to be set in the Alternate Continuity created by the Order of Dagon, as Dawn already exists.
- Entropy and Chaos Magic: Ethan's curse is empowered by the Greek god Chaos.
- Fandom-Specific Plot: For the Buffy fandom it's a Yet Another Halloween Fic Sub-Genre of fanfiction, in which Xander chooses a different outfit for the fateful Halloween when Ethan Rayne turned everyone into their costumes, in this case Batman.
- Slut-Shaming: Noblewoman!Buffy to Willow, because of her Fully-Clothed Nudity. At one point she calls Willow a harlot.
- Knight in Sour Armor: Batman, whose response to noblewoman!Buffy is to flung her over his shoulders while telling to not be hysterical.