Continuity mistake: When the man lies out the map at the Bedrock Auto Club, Barney says to him, "We don't want to go camping in the winter!" and you see that Fred and Barney are next to the man. In the next shot, Fred and Barney have disappeared.
Continuity mistake: When Betty is combing Wilma's hair, the items on the dressing table next to Wilma change position between shots.
Continuity mistake: When Fred and Barney are singing "Old MacDonald" with the international scouts, the groups' signs aren't consistent. At first, they have the names of the countries, but later on they have the names of the languages.
Continuity mistake: While Fred and Barney are fighting, when Pebbles and Bamm-Bamm are devising a plan together in baby-talk, the black strap is over Bamm-Bamm's left shoulder, but when Bamm-Bamm walks past Fred and Barney the strap is over Bamm-Bamm's right shoulder. (00:22:55)
Monster Fred - S5-E2
Continuity mistake: When the doctor puts Fred into the trick box you can see that the box is quite small, but after a quick cut to Barney we return to the doctor and the box is much longer.
Monster Fred - S5-E2
Continuity mistake: In the dinner scene towards the end of the episode, the dish in front of Fred has very little Chinese food in it, but when Pebbles wants some, we cut back to Fred and more has appeared.
Monster Fred - S5-E2
Continuity mistake: When Barney is driving Fred to the doctor after his accident at the bowling centre, you can see that Dino is sitting behind him in his car, but in the shot where Fred says "I don't want to see a doctor!", Dino has disappeared.
Monster Fred - S5-E2
Continuity mistake: When Fred is holding his bowling ball in Alley 13 at the bowling centre, you can see there is a bowling ball rack behind him, but in the next shot the rack has disappeared.
Monster Fred - S5-E2
Continuity mistake: After Fred brakes his car to avoid hitting the black "Catosaurus", Barney's hands can be seen on the front of the car, but they're not on the car in the next shot.
Continuity mistake: When Barney asks Fred if he could have 25 cents for a sandwich whilst practising their ventriloquism act for "The Ed Sullystone Show", you can see Barney has his left arm on his knee, but when we see a close-up of Fred in the next shot, Barney's left arm is missing.
Continuity mistake: When Barney shows Fred the ad in the paper about new novelty acts for "The Ed Sullystone Show", the ad says "Apply Bedrock Broadcasting Co" at the bottom. When we see Fred and Barney in the queue with the other applicants, the station is now called "Bedrock Television Company."
Continuity mistake: When Fred tells Wilma that he is giving up inventing for good at the end of the episode, you can see that Betty is sitting next to Wilma on the couch. When we see a close-up of Fred in the next shot, Betty is missing.
Continuity mistake: When Fred stands on the scales, he is holding a dish containing the reducing formula and there are bubbles coming out of it. In the next shot, there are no bubbles to be seen, but in the next shot, they are back again.
Continuity mistake: At the beginning of the episode, Dino is excited to see Fred back home and he runs and jumps on Fred. When he lands on Fred, on the grass behind him there is the drive to the garage, but in a close-up of Fred, the drive is nowhere to be seen.
Continuity mistake: When Betty walks into the house and is surprised see Fred reduced to a small size, there is nothing by Fred on the ground, but in a close-up of Fred, some small stones have appeared.
Continuity mistake: When Wilma picks up the phone to answer the call from the vet, the lead on the phone changes position between shots.
Continuity mistake: Barney is holding a newspaper in his right hand when he rushes over to Fred's house, but in the shot of him standing in the doorway, the newspaper is nowhere to be seen.
Continuity mistake: When Fred tells Wilma that he is stopping inventing at the end of the episode, he pours the remains of the reducing formula out of the window into Dino's bowl and Fred has a glass in his left hand. When he hears Dino at the front door, the glass has gone.
Continuity mistake: When Barney opens the door and sends Fred flying in the mouse hole, there are two large stones outside the hole, but in the next shot there are now three small stones.
Continuity mistake: When Barney and Betty walk into the Flintstones' kitchen for a cup of tea, Barney stops and behind him there is a table with a lamp on it. In the next shot, the table and lamp have disappeared, and there is now a shelf with plates on the wall.
Answer: The name of the pet is "Baby Puss." He has appeared in episodes, but only a very few. The first episode was probably "The X-Ray Story" from season 2.
Bishop73