Joker (Batman: Mask of Phantasm)

Mark Hamill as Joker; Batman's most famous nemesis, who was once an assassin for Valestra, thus, he is implied to be responsible for the murder of Carl Beaumont. Valestra hires him to kill Batman, but the Joker kills Valestra instead. Hamill claims he took the opportunity of reprising his role from The Animated Series by way of creating new "laughing vocabularies."