In "Howl in the Family," Sholly Fisch has Scoob and the Gang come to the aid of the Ghastleys. This leads to some fine displays of Shaggy and Scooby terrified out of their wits all courtesy by reliable Scooby-Doo artists Robert Pope and Scott McCrae.
The quick reactions of Shaggy and Scooby however turn out to be all for a case of mistaken identity. The obvious ghouls are actually the Ghastleys--this will come to no surprise to anybody who has seen the Flintstones. Sholly though plays by the rules of the Scooby-Doo cosmos. Everything must have a rational explanation, and he provides a good one explaining the Ghastleys. The real fake ghosts, if you catch my drift, are much more frightening figures.