Colossal Boy, or Gim Allon, also known as Leviathan, is a superhero in the 30th and 31st centuries of the DC Comics universe who has gone by a variety of superhero names over the past several decades, although originally (and most commonly) Colossal Boy. He is a member of the Legion of Super-Heroes. Colossal Boy served with the Legion as a loyal and upstanding member. That is, until one day, when his parents were kidnapped and used for extortion purposes. Under great duress, Colossal Boy was forced to reveal vital information which compromised the Legion's laws of secrecy. Since such knowledge is classified and known only to members of the selection board, the men give Gim two weeks to uncover the information, and teleport away with his parents as hostages. A top-secret manual and illegal notes on the Legion training procedures is discovered, and Colossal Boy is charged with treason and spying and, still fearful for his parents' safety, he offers no defense at his trial. Ultra Boy, as the new Legion leader, then expels him from the Legion, and crushed, he leaves in disgrace. However, during a mission to infiltrate a so-called "school for super-villains", some Legionnaires find that Colossal Boy has seemingly joined their ranks and thus find out the true reason for his doing so. After a brief skirmish with the Legion Of Super-Villains, the Legionnaires unanimously decide to re-instate Gim as a member, once more.He first appeared in Action Comics #267 (August 1960). In the 1990s, the entirety of the Legion of Super-Heroes were changed in what was referred to as a "reboot" of those characters continuity, including Allon. Later on, these superheroes were again restarted in what has been referred to as the "threeboot" of the Legion of Super-Heroes. Gim Allon was mutated by a radioactive meteorite, gaining the superhuman ability to increase his size. His superhero codename became Colossal Boy. With his parents' blessing, he joined the Legion of Super-Heroes, becoming a member in good standing. He had an unreciprocated crush on fellow Legionnaire Shrinking Violet.
Entry written by BRIAN TELFORD.
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