The Joker is one of the main antogonists of The New Batman Adventures. He is a professional criminal and an Arkham Inmate. He is voiced by Mark Hamill.
The Joker wants to humiliate and destroy Batman and his allies. A former hired hand for the mob, he was viciously funny, cruel and sardonic. The Joker first encountered Batman during a robbery at the Monarch Playing Card Factory. While he escaped by leaping into a drainage vat of chemical waste, The Joker later discovered that the toxins bleached his skin chalk white, dyed his hair fluorescent green, and stretched his lips into a permanent grin.