Nightmare (Casper's ghost horse)
Nightmare (Casper's ghost horse) appears in 60 issues in grailworth's catalog, and was first published in 1954.
Every appearance we value
Casper & Nightmare (1964) 4 issues
Casper Space Ship (1972) 1 issue
Casper the Friendly Ghost (1952) 2 issues
Spooky (1955) 2 issues
Spooky Spooktown (1961) 3 issues
TV Casper & Co. (1963) 2 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.