When he takes on the alter ego of the "Masked Marvel", Snoopy imagines himself as a world famous arm-wrestling champion. The alter ego's first appearance is part of a storyline in which Lucy is beating everybody in the neighborhood at arm-wrestling. She declares herself to be the world arm-wrestling champion. This alter ego also appears in the TV special, It Was a Short Summer, Charlie Brown, in which the arm-wrestling storyline is adapted from the comic strip.