The Scooby-Doo Detective Agency takes on a case of an attempted hostile takeover of their hometown wrestling promotion. If the episode title, "Wrestle Maniacs", looks familiar, it was used more than a decade later on What's New Scooby-Doo, as we've previously discussed.
Some tropes in this series, such as Shaggy & Scooby's childhood heroes, Commander Cool & Mellow Mutt, didn't carry over to What's New, although, of course, they would become well acquainted with superheroes later on in life, as seen in The New Scooby-Doo Movies.
And, for you comics fans, I don't think anyone would ever have considered that this show's cast has two generations of animated Robins (Casey Kasem & Scott Menville). Like, who would've ever known?