Queer Duck's "Straight" (Evil) Brother

Plot :
As the only live action character in the film, he plays a very minor role to the plot. As Gym Ox and Queer Duck have a very intensely animated make-out session, Queer Duck's "Straight" (Evil) Brother, named William, enters the scene with a knife. He then proceeds to kill Gym Ox leading to our first major character death of the film. This will not be the last however, this is only the beginning. At the middle of the second act, per Will Smith's usual antics, he sings a song at the middle of the act. This song being 06 The Rum Tum Tugger (1998 Film Cast). At the head of the third act, William enters for his final scene. This is the climax of the film. He pulls a gun from Men in Black 3, a reference as to a nod to this character's actor, and proceeds to shoot Bart Simpson. As Queer Duck holds his dying son, he grabs a knife from his pocket that appears to be the same one used to kill Gym Ox and kills his brother.