Shaggy calls the Lion 'Simba'
In the epidode "Bedlam in the Big Top", Shaggy gets hypnotized and starts acting like a Lion tamer. While taming the Lion, he calls it Simba at least twice.
I looked it up and cant find anywhere on the internet where a Lion was named Simba before Disneys "The Lion King", which came out in the 1990s. "Scooby Doo, Where Are You?" was filmed in the 1960's if I remember correctly.
Did Disney rip off the name Simba from Scooby Doo?