Black Spy (official name Joke) is one of the main characters in MADs Spy vs. Spy. His main enemy is the White Spy who he battles in every comic strip. Black Spy is virtually identical to White Spy such as same overcoats and long pointed noses (similar to plague doctor outfits). The only difference between them is the color of their clothes: one dresses in black and the other in white. Black Spy's real name is Joke.
Black Spy and White Spy share an intense hatred for one another, since the entire race of White and Black Spies are at war. Although they're enemies for life, they do seem to have some aspect of respect for one another.
Black Spy is deeply in love with Grey Spy, however, she uses this fact as an advantage in killing both White and Black Spy.