Scooby-Doo! Team-Up issue 21 is a comic published by DC Comics. It hit the shelves on December 28, 2016.
It’s hard enough for Scooby and the gang to crack the mystery of a Dickensian Yuletide ghost...but it’s harder with “help” from Mystery, Inc.’s newest member: Harley Quinn! Harley’s decided to try a new career as a ghost-busting detective—and when she swings that giant mallet, nobody’s going to tell her “no.” But the gang doesn’t suspect the real reason for Harley’s relocation: She’s on the run after a “lover’s spat” with The Joker—and Mistah J wants her back!
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