The character's regular appearances quickly defined him as the archenemy of the Dynamic Duo, Batman and Robin; he killed dozens of people, and even derailed a train.
小丑的经常出现很快就将他变为活力双雄也就是蝙蝠侠和罗宾的大敌;他杀了几十人，甚至造成了一列火车的出轨了。