|Base of Operations:||Gotham City|
|1st Appearance:||Batman: Arkham City|
Mr. Hammer and his brother Sickle were conjoined twins at a traveling circus. The Joker got them separated by Hush and kept Mr.Hammer as a henchman.
Last updated by DAMartin on January 13, 2019.
All Produced Mr. Hammer Action Figures
|2013||DC Direct||Batman - Arkham City||2-Packs||Mr. Hammer & Harley Quinn|
| ||1 Action Figures Produced|
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