Scooby-Doo has been around since 1969 when it effectively created a new formula for Saturday-morning cartoons. The original Scooby-Doo, Where Are You! focused on Scooby and the Mystery Inc. gang as they traveled the country, stumbling upon crimes. The series became Hanna-Barbera's flagship property, and it wasn't long before the show rebooted, with a slew of copycat cartoons using the formula.