Scooby e Scrappy Doo

Scooby's laff-a-lympics had enter it's third season and along with another Scooby Doo cartoon. I enjoyed Scooby up into his annoying nephew came in the picture. Since his brave-hearted nephew came on the scene the chase scenes died down. I loved the chase scenes in the Scooby Doo cartoons especially when Scoob and Shaggy disguise themselves to get away from the villains. Till this day I wonder how this little pup became so popular that Hanna-Barbera took Fred,Daphne,and Velma off the show. In 1983 this mutt had his own show (puppy new adventures) supposedly a spin-off. Then the rest of the gang returned a year later with the show titled "Scooby's New Mysteries". I wonder how this mutt kept five years of popularity without the whole Scooby mysteries inc. gang.