|This needs a stretch. (Feel free to remove when satisfied of completion.)|
* History is incomplete.
The nightmare cats appeared in Scooby-Doo's dream.
They had a humanoid appearance with scary cat faces.
Insert details here.
Scooby-Doo (DC Comics)
After a real case involving a person dressed up as the Frog Demon, Scooby-Doo had a dream about the case which turned into a nightmare about cats. Not only the Demon, but the whole gang turned out to be cats in disguise.
- The image of the cats that got into the dream was from a backpack belonging to Velma Dinkley, which had a glow-in-the-dark "Hiya Kitten" logo on it. This is a reference to Hello Kitty.