Nightmare
Casper's ghost horse
- Also known as
Appearances
- Casper's Capers #5
- Casper the Friendly Ghost #51 — 1956-12-00
- Casper the Friendly Ghost #53 — 1957-02-00
- Spooky #21 — 1958-06-00
- Casper's Ghostland #2 — 1959-04-00
- Casper's Ghostland #9 — 1961-04-00
- Wendy, the Good Little Witch #7 — 1961-08-00
- Casper's Ghostland #11 — 1961-10-00
- Spooky #60 — 1961-10-00
- Wendy Witch World #1 — 1961-10-00
- The Friendly Ghost, Casper #43 — 1962-03-00
- Harvey Hits #59 — 1962-08-00
- Casper's Ghostland #15 — 1962-10-00
- Casper's Ghostland #19 — 1963-10-00
- Spooky Spooktown #9 — 1964-06-00
- Spooky Spooktown #12 — 1965-03-00
- Tuff Ghosts Starring Spooky #15 — 1965-03-00
- Tuff Ghosts Starring Spooky #16 — 1965-05-00
- TV Casper & Co. #11 — 1966-03-00
- Casper & Nightmare #16 — 1967-02-00
- Wendy, the Good Little Witch #40 — 1967-02-00
- Wendy Witch World #20 — 1967-05-00
- Spooky #100 — 1967-10-00
- The Friendly Ghost, Casper #111 — 1967-11-00
- Tuff Ghosts Starring Spooky #31 — 1967-11-00
- Wendy, the Good Little Witch #45 — 1967-12-00
- Tuff Ghosts Starring Spooky #32 — 1968-01-00
- Wendy, the Good Little Witch #46 — 1968-02-00
- Wendy Witch World #27 — 1968-12-00
- Casper's Ghostland #46 — 1969-02-00
- TV Casper & Co. #21 — 1969-03-00
- Casper's Ghostland #49 — 1969-07-00
- The Friendly Ghost, Casper #134 — 1969-10-00
- Casper & Nightmare #26 — 1969-11-00
- Wendy Witch World #40 — 1971-08-00
- Casper & Nightmare #33 — 1971-09-00
- Casper Space Ship #1 — 1972-08-00
- Casper & Nightmare #38 — 1972-10-00
- Sad Sack Navy, Gobs 'n' Gals #2 — 1972-10-00
- Casper and Wendy #2 — 1972-11-00
- Casper's Ghostland #69 — 1972-11-00
- Wendy Witch World #46 — 1972-12-00
- TV Casper & Co. #38 — 1972-12-00
- Casper's Ghostland #70 — 1973-01-00
- Wendy, the Good Little Witch #77 — 1973-01-00
- Casper & Nightmare #40 — 1973-02-00
- Casper & Nightmare #41 — 1973-04-00
- TV Casper & Co. #41 — 1973-06-00
- Casper in Space #8 — 1973-10-00
- Casper's Ghostland #75 — 1973-11-00
- Spooky Haunted House #13 — 1974-10-00
- Spooky Spooktown #57 — 1975-06-00
- Richie Rich & Casper #12 — 1976-06-10
- Casper Digest #6 — 1987-08-00
- Casper Digest #14 — 1990-09-00
- Wendy Digest Magazine #3 — 1991-10-00
- Casper Digest Magazine #13 — 1994-09-00
- Harvey Comics Classics #1 — 2007-06-00
- Harvey Comics Treasury #1 — 2010-09-00
- Casper's Spooksville #1 — 2019-06-12
- Casper's Capers #5 — 2019-06-19