Metallo (John Corben)
Metallo (John Corben) appears in 27 issues in grailworth's catalog, and was first published in 1959. First post-crisis appearance: Superman #1 (1987), cover dated 1987.
First appearance
Every appearance we value
Action Comics (1938) 3 issues
Adventures of Superman (2013) 1 issue
Batman / Superman (2013) 1 issue
Darkness / Superman (2005) 1 issue
Doom Patrol (1987) 1 issue
Superman (2006) 2 issues
Superman Adventures (1996) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.