Lisa the Vampire Croaker
Wikisimpsons - The Simpsons Wiki
Lisa the Vampire Croaker is a story in Bart Simpson Comics #24.
Plot
Willie trains Lisa as a vampire slayer, much to Bart's dismay, as he wants to be the vampire slayer. After training and Bart attacking Hans Moleman, they head up to a spooky, castle like building on top of a dark hill, which turns out the building is a blood bank. In the end Lisa comments, with a family like hers, who needs monsters?
