Colossal Boy


Micro Lad

Nick Name
Civilian ID
Gim Allon
Legal Status
Citizen of the United Planets.
Nation or Planet of Origin
Group Affiliation

Legion of Super-Heroes

Science Police

Base of Operations
Metropolis, Earth
6" - 30'
170 lbs. - Unknown Tons
Eye Color
Hair Color
Known Powers

Normal human mutated by the radiation of a meteorite of unknown origin, enabling the ability to increase size and mass at will, granting superhuman strength, stamina, and durability.

Note: One version of Gim Allon described the character as an alien giant with the ability to shrink to the size of a normal human.


Legion Flight Ring: Two-way communication device worn on the finger enabling the wearer to fly and disrupt electronic tracking systems.

Common Enemies
Regularly Appearing

Adventure Comics Vol. 1

Legion of Super- Heroes Vol. 1, 2, 3, 4, 5, 6, & 7

Superboy and the Legion of Super-Heroes Vol. 1

First Appearance
Action Comics Vol. 1 #267 (Aug. 1960)
Jerry Siegel & Jim Mooney

While visiting the planet Mars, Gim Allon came into contact with a radioactive meteor which fell to the planet near him. The strange radiation had a profound mutation on the human's body, allowing him to grow to ginormous proportions at will.

First using his powers to battle crime as a member of the Science Police, Allon was encouraged by his parents to join the Legion of Super-Heroes as Colossal Boy.

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