[2] When Fred wins the big prize on the "Make A Deal or Don't" game show, he and Wilma plan a vacation with Barney and Betty to Count Rockula's spooky castle in Rocksylvania which has now been turned into a tourist resort.
Unfortunately, during the trip, Fred and Barney accidentally stumble across Rockula's old laboratory, where his unfinished Frankenstone monster sleeps, and forget to close the window when they leave the lab.
Frankenstone awakens Rockula (who has been asleep for the past five hundred years, thus explaining his disappearance) from his secret crypt, and the two scare everyone out of the hotel, except for the Flintstones and the Rubbles, who had gone to bed early due to jet lag.
Winking at Fred, Barney and Betty (watching surreptitiously from the doorway), Wilma agrees to consider marrying Rockula, then immediately begins nagging him about chores, upkeep of the house, and his bad habits.
[3] On August 4, 2020, Warner Bros. Home Entertainment gave it its first wide release as part of the DVD collection The Flintstones: 2 Movies & 5 Specials.