The new format followed the trend of the "babyfication" of older cartoon characters, reducing the original Scooby-Doo, Where Are You! cast to junior-high age. (In doing so, the series reintroduced Fred Jones and Velma Dinkley to the show, both of whom had not appeared as regular characters since the 1970s, and erased Scrappy-Doo from the cast.) This new show also used the same basic formula as the original 1969 show: the "Scooby-Doo Detective Agency" (a forerunner of Mystery Inc.) solved supernatural-based mysteries in the town of Coolsville, where the villains (the ghosts and monsters) were always revealed as bad guys in masks and costumes.
