Question: What character did Casey Kasem portray in What's New, Scooby-Doo?

Context paragraphs:
The Cycle Savages: The Cycle Savages is a 1969 American outlaw biker exploitation film written and directed by Bill Brame, and stars Bruce Dern and Melody Patterson.  The film follows a biker and his crew who go after an artist who sketched his nude girlfriend.  It premiered in Charlotte, North Carolina on August 22, 1969.  Casey Kasem served as one of the film's producers.

Casey's Top 40: Casey's Top 40 was a syndicated radio music program that was distributed by the Westwood One radio network.  The show was a vehicle for then-former "American Top 40" host and co-creator Casey Kasem and ran for over nine years.  Like Kasem's prior show, "Casey's Top 40" aired on weekends and was a countdown of the forty biggest hits of the week on the popular music chart.

America's Top 10: America's Top 10 (commonly abbreviated to AT10) was a television program of music hits based on the "Billboard" Hot 100, with the exception of the last season in 1992 which used the Radio and Records chart.  It aired in syndication by Gold Key Media from 1980–1982 and by All American Television from 1982-1992.  The show was hosted by Casey Kasem, the host of "American Top 40" and "Casey's Top 40", until 1991.  After that point, the show was hosted by Siedah Garrett and then Tommy Puett; Kasem later returned as host until he closed down the show in 1992 to focus on launching "Casey's Countdown," an adult contemporary music spinoff of "Casey's Top 40".  From around 1987 onwards, the show was also transmitted by various regions of ITV in the United Kingdom, where it was often broadcast as part of the network's then-new overnight service.

What's New, Mr. Magoo?: What's New, Mr. Magoo?  is an American animated television series which aired from September 10, 1977, to December 24, 1977, on CBS.  It was produced by DePatie-Freleng Enterprises and United Productions of America.  The series stars Jim Backus, Bob Ogle, Casey Kasem, Hal Smith and Frank Welker.

Stop the Madness: "Stop the Madness" is an anti-drug music video uniquely endorsed and supported by United States President Ronald Reagan and the Reagan administration in 1985.  The video includes Claudia Wells, New Edition, La Toya Jackson, Whitney Houston, David Hasselhoff, Kareem Abdul-Jabbar, Kim Fields, Herb Alpert, Arnold Schwarzenegger, Darrell Creswell, Tim Feehan, Casey Kasem and Boogaloo Shrimp from the "Breakin'" franchise.  Perhaps the main star of the video was Ronald Reagan's wife, Nancy Reagan, whose main cause as First Lady was speaking out against drugs, and forming the "Just Say No" anti-drug association.  Mrs. Reagan appeared twice in "Stop the Madness".

American Video Awards: The American Video Awards (19831987) was an annual music video award show taped for distribution to television.  "The" "First Annual American Video Awards" was hosted by radio personality Casey Kasem, and Kasem continued in his role as emcee of the show in succeeding years.  The first (1983), second (1984) and third (April 1985) shows were syndicated to television channels across the country.  "The Fourth Annual American Video Awards" (November 1985), however, was taped for broadcast on ABC to be aired during prime time, the first time that a video awards show was shown on prime time network television.  The fifth (1987) show again aired in syndication.  Two award ceremonies were held during 1985: the third annual ceremony was held in April 1985 and, because of contractual obligations to ABC, the fourth annual ceremony was held less than a year later, in November 1985.

American Top 20: American Top 20 was the name given to two weekly spinoffs of the music countdown program "American Top 40".  They were both hosted by Casey Kasem for Premiere Networks (originally AMFM Radio Networks) and premiered on the weekend of March 28, 1998, the same weekend Kasem returned to host "American Top 40".

What's New, Scooby-Doo?: What's New, Scooby-Doo?  is an American animated sitcom mystery comedy series produced by Warner Bros.  Animation for The WB television network; it is the ninth incarnation of the "Scooby-Doo" franchise that began with Hanna-Barbera's "Scooby-Doo, Where Are You! " and the first of such since the previous incarnation, "A Pup Named Scooby-Doo", ended in 1991.  The series revives the format of "Scooby-Doo, Where Are You!" , in which the title character and his companions, Fred Jones; Daphne Blake; Velma Dinkley and Shaggy Rogers, travel to varying locations solving mysteries; this format is modernized for "What's New, Scooby-Doo?" , in which the characters utilize technology that did not exist at the time "Scooby-Doo, Where Are You!"  first aired.  It is the first television series in the franchise in which Frank Welker, Grey DeLisle and Mindy Cohn respectively portrayed the voices of Scooby-Doo, Daphne and Velma; and the final one in which Casey Kasem portrayed Shaggy, having originally quit the role following a dispute regarding the portrayal of the character.

Jean Kasem: Jean Thompson Kasem (born c. 1955) is an American actress.  She is the widow of radio personality Casey Kasem.

Casey Kasem: Kemal Amin "Casey" Kasem (April 27, 1932 – June 15, 2014) was an American disc jockey, music historian, radio personality, voice actor, and actor, known for being the host of several music radio countdown programs, most notably "American Top 40", from 1970 until his retirement in 2009, and for providing the voice of Norville "Shaggy" Rogers in the "Scooby-Doo" franchise from 1969 to 1997, and again from 2002 until 2009.

Supporting paragraphs: What's New, Scooby-Doo? Casey Kasem
Answer: Norville "Shaggy" Rogers