Scrappy-Doo 1979 had begun to sink to the point of cancellation threats from ABC, who were considering between choosing between Scooby-Doo and an unnamed pilot From Ruby-Spears Enterprises, whose pilot Evanier had also written. He successfully boosted the show's ratings and kept the show alive. Scrappy has a contradicted origin. Originally as shown in the introduction of the series, Scrappy only met his Uncle Scooby as a puppy. However, the December 1980 episode of "Scooby-Doo and Scrappy-Doo" ("Scrappy's Birthday") depicts Scrappy-Doo's birth with both Scooby and Shaggy in attendance. Born at St. Bernard's Hospital to Scooby-Doo's sister Ruby-Doo on December 20,
Scooby-Doo, Where Are You! Roberts, and were performed by Roberts, who also made a new recording of the "Scooby Doo, Where Are You!" theme song for the second season. The series' theme song has been covered by several subsequent artists, including Matthew Sweet for the 1995 TV special and album ""; Third Eye Blind for the 1998 film "Scooby-Doo on Zombie Island"; Billy Ray Cyrus for "Scooby-Doo! and the Witch's Ghost" (1999); Jennifer Love Hewitt for "Scooby-Doo and the Alien Invaders" (2000); the B-52's (Cindy, Kate and Fred) for "Scooby-Doo and the Cyber Chase" (2001); MxPx for the live-action "Scooby-Doo" film (2002); and Krystal