Real Name: N/A
Occupation: Criminal
Marital Status: Single
Base of Operations: Gotham
Height: N/A
Weight: N/A
Eyes: N/A
Hair: N/A
First Appearance: Detective Comics #148 (June 1949)
Created By: Bill Finger

Zero was a scientisit-turned-criminal who had devised a clever reducing ray that could reduce a normal human to nine inches tall. He intended to use it to extort riches from the wealthy victimsbut was interrupted by the arrivial of Bamtna and Robin. They were reduced in size but fought on, forcing Zero to grab a shotgun inorder to kill them. The gun misfired, killing Zero instead. After three days the invisible ray's effects wore off, returning Batman and Robin to normal.