Having decided that the lawbreakers of Gotham City needed a costumed protector just as honest citizens had Batman, Killer Moth emulated the Dark Knight in every way, copying his paraphernalia and building on his legend to create his own super villain identity. He eventually came to resemble a dark mirror image of Batman, even adopting the alter ego of a wealthy philanthropist similar to Bruce Wayne. Moth was motivated by greed rather than justice and only served the criminal underworld for a price. His bizarrely ingenious weaponry, such as "Mothmobile" modeled on the Batmobile and an incapacitating cocoon gun, did not protect him from consistent defeat at the hands of Batman.