Captain Marvel (DC Comics) Comics" #21 (1941) introduced the Lieutenant Marvels: three other boys named "Billy Batson" who could also become adult superheroes. Captain Marvel, Jr., the alter-ego of disabled newsboy Freddy Freeman, debuted in "Whiz Comics" #25 (1941). Mary Marvel, alter-ego of Billy's twin sister Mary Batson, first appeared in "Captain Marvel Adventures" #18 (1942). In contrast to Captain Marvel and the Lieutenants, both Mary Marvel and Captain Marvel, Jr. remained kids in superhero form, and were given their own eponymous books in addition to appearing as the lead features in "Master Comics" and "Wow Comics", respectively. Captain Marvel, Captain Marvel Jr., and
The Super Hero Squad Show ABC3, in October 2009. A massively multiplayer online game, entitled "Marvel Super Hero Squad Online" was released to the public in April 2011. The game is heavily based on the "Super Hero Squad" franchise, with "The Super Hero Squad Show"'s character designs returning. A four-part comic book series based on the show called "Marvel Super Hero Squad" was released in the fall of 2009. The series was a success and Marvel renewed the series in January 2010 as an ongoing series, now entitled: "Super Hero Squad". The comic does not feature only characters from the show, but also characters outside