Comet (Biron, Supergirl's Super-Horse)
Comet (Biron, Supergirl's Super-Horse) appears in 22 issues in grailworth's catalog, and was first published in 1962. First chronological appearance: Action Comics #292 (1938), cover dated 1962.
First appearance
Every appearance we value
Adventure Comics (1938) 2 issues
Adventures of Superman (1987) 1 issue
Batman: Li'l Gotham (2013) 1 issue
The Best of DC (1979) 1 issue
DC Special (1968) 1 issue
Superboy (1949) 1 issue
Superman (1939) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.