Concealed by Saturn Girl's psychic screen, Chameleon Boy and his teammates kept close watch on Miss Martian and Superboy. An ensuing cave-in, caused by their enemy, forced the trio to take cover and retreat. After scouting the perimeter for their foil, Chameleon Boy reconvened with Saturn and Phantom Girl.
Camouflaged by Saturn Girl's telepathy, Chameleon Boy, Saturn Girl and Phantom Girl spied on Superboy. When Saturn Girl sensed Miss Martian approaching, the trio took off, fearing Miss Martian would detect them.
Later that day, the trio kept close watch on the Royal Arena as Prince J'emm gave a speech to the audience. When Phantom Girl's Time Scanner alerted them to the presence of their enemy, they rushed to intercept him. However, they lost the trail on everyone, because Miss Martian was blocking Saturn Girl's telepathy.
Chameleon Boy is a Durlan shape-shifter and a member of the Legion of Super-Heroes.
This is his third animated appearance. He has appeared in the DC Animated Universe (as a guest appearance in Superman: The Animated Series and a cameo Justice League Unlimited) and as a member of the main team in the animated series Legion of Super-Heroes.