Joker Toxin

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Real Identity: Not Applicable
Appearances (BTAS): The Last Laugh, The Laughing Fish, Almost Got'Im, Harley and Ivy, Harlequinade, Mask of the Phantasm, and Beware the Creeper
Appearances (STAS): World's Finest Part One
Appearances (BB): Return of the Joker
Appearances (JL): Wild Cards Part One
Appearances (SS): The Big Leagues
Powers/Skills: Facial Reconstruction, Laugh Inducement, and Death
Voiced By: Not Applicable

The Joker Toxin is the most infamous of the Joker's weapons. It is a binary compound, believed to be chemicals that caused his transformation. The toxin is emitted in gas form from a gag flower on the Joker's lapel or in liquid form, usually injected through a hypodermic needle. The victim engages in an uncontrollable fit of laughter until death sets in. The toxin also contorts its victim's facial muscles into a fiendish grin much like the Joker's. Batman developed an anti-toxin that can cure the condition. It is administered with a hypo-gun. On one plan, the Joker used a diluted toxin to affect only fish and filed for exclusive rights at the Office of Copyrights Gotham City Division, knowing it wouldn't clear. However, after further experimentation, the Joker discovered sharks and piranha were immune to the toxin.