Here's the easiest way to comprehend the longevity of Scooby-Doo: Casey Kasem has been doing the voice of Shaggy (Norville Rogers, if you insist on his given name) for longer than he hosted his weekly Top 40 radio show.
Advocate definition, to speak or write in favor of; support or urge by argument; recommend publicly: He advocated higher salaries for teachers. See more. Dictionary.com
a person who puts forward a proposition or proposal. 2. a person who argues in favor of something; an advocate. 3. a personwho supports a cause or doctrine; adherent. 4. a person who propounds a legal instrument, such as a will for probate.