Chameleon Boy (Reep Daggle) is a shape-shifting member of the 30th century Legion of Super-Heroes and hails from the planet Durla. Colossal Boy suggests his similarities to the Earth lizard after which Daggle names himself. Chameleon Boy has an uncanny ability to assume the look of any lifeform, real or imagined, often leading him to serve on missions for the Legion's Espionage Squad. Aside from his own powers, Chameleon Boy is also known as the keeper of the Antarean shape-shifting creatures he names Proty and Proty II (first appearances: (Proty I) Adv No. 308/2, May 1963: "The Return of Lightning Lad!"; (Proty II) SPJO No. 72/1, Oct 1963: "The World of Doomed Olsens!")—the former being notable for his sacrifice in the cause of Lightning Lad's life (Adv No. 312/1, Sep 1963: "The Super-Sacrifice of the Legionnaires!") and the latter performing similar deeds as a member of the Legion of Super-Pets (Adv No. 322/1, Jul 1964: "The Super-Tests of the Super-Pets"; and others).
An alternate version of Chameleon Boy is encountered by Superboy when the Boy of Steel is hurled to a different reality after an alien sun goes nova. Upon his arrival in the parallel (and mis-spelled) "Smallvile", Superboy meets the counterparts of five members of the Legion of Super-Heroes: Brainiac 5, Element Lad, Invisible Kid, Ultra Boy, and Chameleon Boy - who in this universe are evil. During this encounter, the five delinquents attempt to expose Superboy's secret identity as Clark Kent. Superboy, after realizing what they are up to and that he is in fact on a parallel Earth, is able to contact his counterpart, who has been away on a mission. The two Superboys assist each other in thwarting the criminals' efforts and, after apprehending them, return the villainous Legionnaires to their own time (SB No. 117, Dec 1964: "Superboy and the 5 Legion Traitors").