Gim Allon

Gim Allon, also known as Colossal Boy, Leviathan, and Micro Lad, is a fictional comic book superhero appearing in books published by DC Comics. Created by writer Jerry Siegel and artist Jim Mooney, the character first appeared in Action Comics #267 (August 1960), and is a member of the 30th and 31st superhero team, the Legion of Super-Heroes.

He has gone by a variety of superhero names over the past several decades, although originally (and most commonly) Colossal Boy. The character's name's similarity to the standard Israeli surname Allon led writer Paul Levitz in 1980 to identify the character as Jewish.

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 rebooted in what has been referred to as the "threeboot" of the Legion of Super-Heroes.

Gim Allon
Leviathan (comics)
Gim Allon as Leviathan.
Art by Jeff Moy.
Publication information
PublisherDC Comics
First appearanceAction Comics #267
(August 1960)
Created byJerry Siegel
Jim Mooney
In-story information
Alter egoGim Allon
Place of originEarth (31st century)
Team affiliationsLegion of Super-Heroes
Science Police
Notable aliasesLeviathan, Micro Lad
AbilitiesAs Colossal Boy and Leviathan:
Expand his body to giant size
Superhuman strength and mass
As Micro Lad:
Shrink size of his body

Fictional character biography

Original continuity

Gim Allon as Colossal Boy, in his Silver Age costume. Art by Curt Swan and George Klein.

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; this crush was only returned when Violet was replaced by a shapeshifting impostor, a Durlan named Yera. The two were married; when the deception was exposed, he discovered that he was still in love with Yera, and they remained married. For a time, Colossal Boy's mother Marte Allon was the President of Earth.

During the "Five Year Gap" following the Magic Wars, Gim joined the Science Police and ultimately never returned to the Legion. Earth fell under the covert control of the Dominators, and withdrew from the United Planets. A few years later, the members of the Dominators' highly classified Batch SW6 escaped captivity. Originally, Batch SW6 appeared to be a group of teenage Legionnaire clones, created from samples apparently taken just prior to Ferro Lad's death at the hands of the Sun-Eater. Later, they were revealed to be time-paradox duplicates, every bit as legitimate as their older counterparts. After Earth was destroyed in a disaster reminiscent of the destruction of Krypton over a millennium earlier,[1] a few dozen surviving cities and their inhabitants reconstituted their world as New Earth. The SW6 Legionnaires remained, and their version of Colossal Boy assumed the code name Leviathan.

1994 reboot

In 1994, following the events of the Zero Hour crossover, the original continuity of the Legion ended and their story was restarted from the beginning. In this continuity, Gim Allon was known as Leviathan and was from Mars instead of Earth. Like his previous counterpart, he was a Science Police officer who was given his powers after being grazed by a meteorite.

He was the first official leader of the team, but he resigned after one mission, following the death of the first Kid Quantum and realizing that Cosmic Boy was more suited to the role. Cosmic Boy persuaded him to retain some leadership as deputy.

Allon then became ensconced in a love triangle. While he nursed a crush on Kinetix, Shrinking Violet nursed a crush on him. This ended in tragedy when the Emerald Eye, on orders from Violet to give each member of the team their heart's desire, caused him to die in battle with Doctor Regulus, fulfilling his wish to have a heroic death.

2004 reboot

In the 2004 relaunch, Gim Allon is a member of race of giants created by Bizarro Brainiac 200 years prior to the start of the 31st century. Allon considers his superpower to be the ability to shrink to six feet tall and prefers the code name Micro Lad. Still, all Legionnaires, as well as the public in general, know him as Colossal Boy. He often affects a bemused manner with his comrades, enjoying his time spent with "little people." Gim is often both the first and last Legionnaire in a fight, as his size grants him first strike ability as well as serving useful in the cleanup operations which inevitably follow.

(An Imskian villain used the name Micro Lad in the original continuity.)

Post-Infinite Crisis

The events of the Infinite Crisis miniseries have apparently restored a close analogue of the Pre-Crisis Legion to continuity, as seen in "The Lightning Saga" story arc in Justice League of America and Justice Society of America, and in the "Superman and the Legion of Super-Heroes" story arc in Action Comics. Colossal Boy is included in their number, along with his wife Yera (who has taken the name Chameleon Girl).

Powers and abilities

As Colossal Boy or Leviathan, Gim Allon could increase his size to many times the height of a human, with proportionate increases in strength and mass. In the 2004 version of Legion of Super-Heroes, the character insists that his powers involve shrinking instead of growing, although the effect upon opponents appears to be the same.


As a member of the Legion of Super-Heroes he is provided a Legion Flight Ring. It allows him to fly and protects him from the vacuum of space and other dangerous environments. Brainiac 5 modified his ring so it will enlarge with him, allowing it to support the additional mass.

In other media

  • Colossal Boy made a cameo in the Justice League Unlimited episode "Far From Home".
  • Colossal Boy appears in three episodes of the first season of the animated TV series Legion of Super Heroes. In "Timber Wolf," he is only seen on a monitor. In "Lightning Storm", he helps the Legion stop a squid-like alien in space. He appears in "Chain of Command" for a mission. He became a semi-regular character in the second season. He was voiced by Adam Wylie.


  1. ^ Legion of Super-Heroes (vol. 4) #38, (Late December 1992)

Allon (a Hebrew language word meaning "oak tree") may refer to:

Allon (surname)

Allon, Georgia, a ghost town

Allon Road, named after Yigal Allon

Allon (village), an Israeli settlement east of Jerusalem, also named after Yigal Allon

Allon, the son of Jedaiah, of the family of the Simeonites, in the Bible

Gim Allon, fictional superhero

Allon (surname)

Allon is a Hebrew language surname, which means "oak tree". The name may refer to:

George Allon (1899–1893), British football player

Henry Allon (1818–1892), British priest

Joe Allon (born 1966), British football player

Tom Allon (born 1962), American newspaper publisher

Yigal Allon (1918–1980), Israeli general and politician


GIM or Gim may refer to:

Generation Investment Management, London, UK

Goa Institute of Management, an Indian Business School

Gruppe Internationale Marxisten, a Trotskyist group

Guided Imagery and Music, a technique used in music therapy

Gim (food), a Korean-style laver

Gim (sword), long used in China

Ğīm, the fifth letter of the Arabic alphabet

Kim (Korean name) or Gim, a Korean surname

GIM mechanism, a mechanism in quantum field theory.

Moluccan Evangelical Church, (Geredja Indjili Maluku), the Netherlands

Leviathan (comics)

Leviathan, in comics, may refer to:

Leviathan, an alias used by Legion of Super-Heroes member Gim Allon

Leviathan (Marvel Comics), a fictional Soviet-based terrorist organization

Leviathan (DC Comics), a criminal organization run by Batman villain Talia al Ghul in Batman Inc. and Batman Incorporated

Leviathan (2000 AD), a story from 2000 AD

Leviathan (comic strip), a British comic strip from the Independent on Sunday

Leviathan, the original alias of Marvel Comics character Edward Cobert, better known as Gargantua

Leviathan, a Marvel Comics character who appeared in Nick Fury, Agent of S.H.I.E.L.D.

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The following is a list of fictional characters that appear in the comic books of Amalgam Comics. Any characters mentioned, but not seen, are excluded. They are listed by comic book and a team section is also provided. The amalgamations of characters or the Amalgam versions of one character are given. Plots of the Amalgam comic books are given in the list of Amalgam Comics publications and additional information about characters is provided in the references.

List of Legion of Super-Heroes enemies

This is a list of fictional characters from DC Comics who are enemies of the Legion of Super-Heroes.

List of Legion of Super-Heroes members

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List of Middle Eastern superheroes

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Superboy's Legion

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Yera Allon

Yera Allon, also known as Chameleon Girl, is a fictional character, a superheroine and Legion of Super-Heroes member in the DC Universe's 30th and 31st centuries.

Founding members
Notable members
Special members
Supporting characters
Alternate continuities
In other media
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