Sidewinder (Seth Voelker)
Sidewinder (Seth Voelker) appears in 22 issues in grailworth's catalog, and was first published in 1980. First appearance: Marvel Two-in-One #64 (1974), cover dated 1980.
First appearance
Every appearance we value
Amazing Spider-Man (1963) 1 issue
Captain America (1968) 17 issues
Marvel Two-in-One (1974) 2 issues
Thor (1966) 1 issue
X-Men (1963) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.