Scooby-Doo and Scrappy-Doo (1979 TV series) threatening cancellation for the show, whose ratings were in decline. ABC was going to choose between two shows-Scooby-Doo or an unnamed pilot from Ruby Spears Enterprises. Therefore, for its 1979–1980 season, "Scooby-Doo" was given a major overhaul, adding the character of Scooby's nephew Scrappy-Doo, voiced by Lennie Weinrib, and changing the name of the show to "Scooby-Doo and Scrappy-Doo". Although still present in these episodes, the characters of Fred, Daphne, and Velma became less essential to the plot and Shaggy, Scooby and Scrappy were the main focus. Marla Frumkin took over Pat Stevens' role as Velma Dinkley towards the end
Scooby-Doo! The Mystery Begins first seen on the DVD of "Scooby-Doo! and the Samurai Sword", "17 Again" and "Shorts". "Scooby-Doo! The Mystery Begins" was the most-watched telecast in Cartoon Network history with 6.1 million viewers on September 13, 2009, outdistancing the previous high of 3.9 million viewers that tuned into the premiere of the animated series "". Due to the success of "Scooby-Doo! The Mystery Begins", a sequel went into development in October 2009. Titled "Scooby-Doo! Curse of the Lake Monster", principal photography commenced on March 15, 2010 in various locations around Southern California. The sequel aired on October 16, 2010 and was released