Disambiguation: Thelius bioduplicate, Earth-616
First published in: 1991
Thanos created a bioduplicate of Marvel Boy (Robert Grayson) in Quasar (Marvel, 1989 series) #26 (September 1991). He was unaware that the basis of this duplicate was actually an unstable Uranian Eternal named Thelius who believed he was the real Robert Grayson (see character record for The Crusader). This version of Marvel Boy renamed himself Blue Marvel in Quasar (Marvel, 1989 series) #41 (December 1992).