Nightmare

Nightmare is a ghost horse who serves as the loyal steed of Casper the Friendly Ghost, accompanying the friendly young ghost on his adventures. Like Casper, Nightmare debuted in Harvey Comics as a supernatural but gentle companion.

Few characters can claim they've been haunting the same beloved comic book universe since 1956, but Nightmare has done exactly that — a Golden Age original who first materialized in Casper the Friendly Ghost #51 and never really left. A fixture of Harvey Comics' warm, whimsical world, this character built a presence substantial enough to anchor dedicated series like Casper & Nightmare and Casper's Ghostland, sharing pages across the decades with fan favorites like Spooky, Wendy, Fatso, Fusso, and Lazo. With 56 catalog appearances spanning an impressive 63 years and at least one collector-recognized key issue to their name, Nightmare is a genuine piece of Harvey history — the kind of character that rewards longtime fans and charms newcomers alike.