Metallo
Metallo is a radioactive cyborg intelligence who depends on Green Kryptonite as his energy source. He is a former soldier who was used in experimentation by the United States Army, eventually giving him the ability to project his consciousness into any technological device.
First Appearance: Action Comics #252 (1959)
Creators: Robert Bernstein, Al Plastino
Powers: Cybernetic Enhancement
Ongoing Series
Limited Series
One-Shots
Comments
Action Comics #252 - First appearance of Supergirl, Metallo
Superman #423 - Whatever Happened to the Man of Tomorrow?
Superman Vol. 2 #1 (1987)
Superman Vol. 2 #2
Adventures of Superman #441
Superman Vol. 2 #20
Superman: Secret Origin #6
Superman #651
Action Comics #851
Action Comics Annual #11
Action Comics Vol. 2 #1 (2011)
Action Comics Vol. 2 #2
Action Comics Vol. 2 #3
Action Comics Vol. 2 #4
Action Comics Vol. 2 #8
Action Comics Vol. 2 #23.4 – Metallo
Forever Evil #1 (2013)
Justice League of America Vol. 3 #8
Forever Evil #4
Read Superman: Doomed here.
Action Comics #976
Action Comics #977
Action Comics #978
Action Comics #979
Action Comics #980
Action Comics #981
Action Comics #982
Action Comics #983
Action Comics #984
Action Comics #987
Action Comics #1047
Action Comics #1048
Action Comics #1049
Action Comics #1050
Action Comics #1051
Action Comics #1052
Action Comics #1053
Action Comics #1054
Action Comics #1055
Action Comics #1056