I agree that he never called himself the Great Mesmo and he dressed up as Wilma to enter the Tasty Pastry Contest in Wilma’s place when she got sick and couldn’t go.
No, it couldn’t be Astro, or Scooby-Doo either. They’d say it “Rinstones Rivia Restion.”
I think Dino’s a Snorkasaurus, though I’m not exactly sure. And though I don’t know, I’ll guess that The Monster is playing for one night only. (Though it must be a very long night for them to continually see it, and not only see it once before the two families had children, but again when the Flintstones had Pebbles, and again when the Rubbles had Bamm-Bamm. Bedrock must have very long nights. And with nights that long, Fred should probably learn that if he orders ribs, his car will fall over; and the cat will lock him out if he tries to put the cat out. But as one Doper said on Da Board™ once, some of the rocks at Fred’s quarry are probably smarter than he is. But now I’m just rambling.)