Captain Marvel (DC Comics) in unison, they can become adult superheroes as well. In "Whiz Comics" #25 (Dec 1941), Captain Marvel saves Freddy Freeman, a boy who had been left for dead by the evil Captain Nazi, and does for Freddy what the wizard did for him. By speaking the name "Captain Marvel," Freddy can become the superpowered Captain Marvel, Jr.. Unlike Billy, Freddy retains his 14-year-old appearance as a superhero. "Captain Marvel Adventures" #18 (Dec. 1942) introduced Billy and Freddy to Mary Bromfield, a rich girl who turns out to be Billy's long-lost twin sister. By saying the magic word "Shazam," Mary Bromfield
Captain Marvel (DC Comics) adversaries in Modern Age comic book stories. The two are often portrayed as equally matched and, while Marvel does not possess Superman's heat vision, X-ray vision or superhuman breath powers, the magic-based nature of his own powers are a weakness for Superman. The National Comics/Fawcett Comics rivalry was parodied in "Superduperman", a satirical comic book story by Harvey Kurtzman and Wally Wood in the fourth issue of "Mad" (April/May 1953). Superduperman, endowed with muscles on muscles, does battle with Captain Marbles, a Captain Marvel caricature. Marbles' magic word is "SHAZOOM", which stands for Strength, Health, Aptitude, Zeal, Ox (power of),