Son of Rockzilla

Son of Rockzilla is an episode of The Flintstones.
Mr. Fiendish is trying to come up with an idea for a new monster movie. His assistant reminds him of their last publicity stunt, "Win a date with Frankenstone." Mr. Fiendish states that that stunt failed when people found out that the monster was married.
Eventually, the men decide on a new movie called Son of Rockzilla. They begin by faking a Rockzilla attack with a recording of Rockzilla growling and snarling. This works very well, and Fiendish and Bunkley look for someone to play Rockzilla. When they see Fred Flintstone venting at Barney Rubble, they decide he's the perfect one for the part.
Later, Fred is wearing his Rockzilla costume, but discovers that he can't scare anyone. Even Pebbles, Bamm-Bamm, and Arnold show no fear. Barney suggests that Fred practice at the Bedrock Zoo. There, the men see Doris the Finkasaurus, whom Barney rouses. She mistakes Fred for a male of her species, and breaks out of her cage. At the same time, Mr. Fiendish has created a phony "Monster Loose" story. Those who see Doris believe she's the monster, and run off in terror. By now, Fred is being pursued by the police. Even worse, he can't remove his Rockzilla head. While Wilma Flintstone and Betty Rubble finally get the head off, Barney has mistaken Doris for Fred, and soon realizes his mistake. In the end, Barney takes Doris back to the zoo.
Quotes
Arnold: Hiya, Mr. Flintstone. Who are you pretending to be? Queen Kong?
Fred Flintstone: Queen Kong? Why you little---
Arnold: Ah-ah-ah. You're being a very naughty monster. I've heard of hammy performances, but WOW!
Trivia
* This episode aired ten years after Godzilla: King of the Monsters premiered in Japan.
* In real life, Son of Godzilla was produced and released three years later.
* The newsie who spreads the word about the monster being loose in Bedrock is clearly not Arnold.
* In 1978, Hanna-Barbera produced an animated series about Godzilla that aired on NBC, and ran for three seasons.