DC Comics Batman Adventures #12 | Comic Con Box Color Cover

1st appearance of Harley Quinn in a comic book. "Batgirl: Day One." Barbara Gordon attends a costume party dressed as Batgirl. Unfortunately, Poison Ivy and Harley Quinn also decide to show up. Based on Batman The Animated Series. Script by Kelley Puckett, pencils by Mike Parobeck, inks by Rick Burchett. Cover by Parobeck. Published June 2016 by DC.