In this ducklightful animated feature film, Daffy Duck opens up the ghostbusting Ghouls R’ Us Agency. “It’s supply and demand,” the spook sleuth explains. “My clients supply the ghosts. And I demand the money.” Highlights include Daffy “Anything for a buck” Duck pitching his wares on TV; a house call to aid a vampy seducktress; a ghost-to-ghost hookup with Zed Toppel on Frightl…