This appearance was from a back-up story in "Batman: Gotham Knights" titled 'The Bet.' Ronnie Del Carmen drew Quinn several years earlier in 1995 for "Batman Adventures Holiday Special." 'The Harley and the Ivy' which is about Harley Quinn and Poison Ivy kidnapping Bruce Wayne with Ivy's hypnotic lipstick, and using his credit cards to treat themselves to a Christmas shopping spree, was later adapted for the Batman Animated episode, "Holiday Knights."