Question: What actor who is known for his role in The Pagemaster as well as being the voice of Fred in Scooby Doo, voices the nibbler in Futurama?

<P0-S0> The Pagemaster is a 1994 American live-action/animated fantasy adventure film starring Macaulay Culkin, Christopher Lloyd, Whoopi Goldberg, Patrick Stewart, Leonard Nimoy, and Frank Welker. <P0-S1>  The film was produced by Turner Pictures and released by 20th Century Fox on November 23, 1994. <SEP> <P1-S0> Franklin Wendell Welker (born March 12, 1946) is an American actor, who for most of his career has specialized as a voice actor. <P1-S1>  He is best known for his role as Fred Jones from the "Scooby-Doo" franchise since its conception in 1969, as the only original voice actor still with the "Scooby-Doo" franchise, along with the voice of Megatron in the "Transformers" franchise, specifically "Transformers G1" and "", as well as Scooby-Doo since 2002. <P1-S2>  He is also well known as both the vocal effects and the voice of Nibbler in "Futurama". <SEP> <P2-S0> William Richard West (born April 16, 1952) is an American voice actor, singer, comedian, musician, songwriter and former radio personality who is known for his voice-over work in a number of television series, films, video games and commercials. <P2-S1>  He has done hundreds of voice-overs in his career such as Ren (season 3 to season 5) and Stimpy on "The Ren & Stimpy Show"; Doug Funnie and Roger Klotz on "Doug"; and Philip J. Fry, Professor Farnsworth, Dr. Zoidberg, Zapp Brannigan and a number of others on "Futurama". <P2-S2>  He does voices for commercials and is the current voice of the red M&M and was also the voice of Buzz, the Honey Nut Cheerios Bee until 2004. <P2-S3>  In addition to his original voices, he has voiced Bugs Bunny, Elmer Fudd, Shaggy Rogers, Popeye and Woody Woodpecker during later renditions of the respective characters. <P2-S4>  He was a cast member on "The Howard Stern Show", noted for his impersonation of The Three Stooges' Larry Fine. <SEP> <P3-S0> John Kassir (born October 24, 1957) is an American actor, voice actor and comedian. <P3-S1>  He is known as the voice of the Crypt Keeper in HBO's "Tales from the Crypt" franchise. <P3-S2>  Kassir is also known for his role as Ralph in the Off-Broadway show "Reefer Madness", as well as its film adaptation, as well as his voice over work as Buster Bunny (taking over for Charlie Adler late in the final season of "Tiny Toon Adventures"), Ray "Raymundo" Rocket on "Rocket Power", the mischievous raccoon Meeko in "Pocahontas" and its direct-to-video sequel, Jibolba in the "Tak and the Power of Juju" video game series, and the current voices of Pete Puma in "The Looney Tunes Show", and Deadpool in "" and the "" series. <P3-S3>  He has also recently done the voice of Rizzo for the newest Spyro game, , and voiced Ghost Roaster in "", as well as Short Cut in "" and Pit Boss in "". <P3-S4>  He is also known for his various roles in season 1 of "The Amanda Show". <P3-S5>  He voiced the Ice King in the Adventure Time (pilot) but was replaced by Tom Kenny for the series. <P3-S6>  He also provided additional voice over work for "Sonic the Hedgehog", "Eek! <P3-S7>  The Cat", "The Brothers Flub", "Dead Rising", "Casper's Scare School", "Spider-Man 3", "", "Diablo III", "Monsters University", "The Prophet", "" and "The Secret Life of Pets".