The Mystery of the Batman: Case of the Dark Knight

Untitled Batman/Case Closed Crossover is a crossover work of Batman: The Animated Series and Case Closed.

From Batman:

 * Batman/Bruce Wayne
 * Robin/Tim Drake
 * Batgirl/Barbara Gordon
 * Nightwing/Dick Grayson (Mentioned Only)
 * Alfred Pennyworth
 * Commissioner James Gordon (Mentioned Only)
 * Lucius Fox (Mentioned Only)
 * The Joker
 * Harley Quinn
 * The Riddler (Cameo as a mannequin)
 * Two-Face (Cameo as a mannequin)
 * Mr. Freeze (Cameo as a mannequin)
 * Poison Ivy
 * Ra's al Ghul (Mentioned Only)
 * Killer Croc (Cameo as a mannequin)
 * Talia