PRELUDES AND KNOCK-KNOCK JOKES
Originally published in Harley Quinn #1-7, December 2000 – Jun 2001
The Joker’s paramour bounds from her cartoon world to take Gotham City by storm. When the Clown Prince of Crime betrays her, Harley sides with Two-Face, Catwoman, Poison Ivy and The Riddler to launch her own lunatic crime spree, the likes of which the GCPD has never seen before.
THE BATMAN ADVENTURES #12 -Originally published in September 1993
The first comic-book appearance of Harley Quinn sees her team up with Poison Ivy to gatecrash a costume party, unaware that Batgirl is a guest.