Question: Who created the characters voiced by William Richard West in "The Ren & Stimpy Show"?

full_context: Document 1: Carlos Alazraqui: Carlos Jaime Alazraqui (born July 20, 1962) is an American stand-up comedian, actor, voice actor, singer, impressionist, producer and screenwriter possibly best known as Deputy James Garcia on "Reno 911!". His extensive voice-over work includes the role of Bobbi Fabulous on "Phineas and Ferb", the Taco Bell chihuahua in the Taco Bell commercials, Denzel Crocker and Juandissimo Magnifico on "The Fairly OddParents", Rocko and Spunky on "Rocko's Modern Life", Lazlo and Clam in "Camp Lazlo", Grandpapi Rivera in "," and as Mr. Weed in "Family Guy". He is a weekly contributor on "The Stephanie Miller Show".
Document 2: Fred Stoller: Frederick "Fred" Stoller (born March 19, 1958) is an American stand-up comedian, actor, author, writer, and voice artist. He is best known for portraying Gerard on "Everybody Loves Raymond". He is also the voice of Stanley in the "Open Season" franchise, Fred the Squirrel in The Penguins of Madagascar, Chuck the Evil Sandwich Making Guy in Wordgirl, and Rusty the monkey wrench on Disney Jr.'s "Handy Manny".
Document 3: Billy West: 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. 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". 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. 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. He was a cast member on "The Howard Stern Show", noted for his impersonation of The Three Stooges' Larry Fine.
Document 4: Ren &amp; Stimpy's Crock O' Christmas: Ren & Stimpy's Crock O' Christmas is the second studio album and only Christmas album featuring characters from the Nickelodeon animated series, "The Ren and Stimpy Show".
Document 5: Bill Fagerbakke: William Mark "Bill" Fagerbakke ( ) is an American actor and voice actor. He is best known for his long-running roles as Patrick Star in the animated series "SpongeBob SquarePants" and Michael "Dauber" Dybinski on the sitcom "Coach". He also appeared in 12 episodes of the sitcom "How I Met Your Mother" as Marshall Eriksen's father Marvin.
Document 6: Bugs Bunny: Bugs Bunny is an animated cartoon character; created in 1940 by Leon Schlesinger Productions (later Warner Bros. Cartoons) and voiced originally by Mel Blanc. Bugs is best known for his starring roles in the "Looney Tunes" and "Merrie Melodies" series of animated short films, produced by Warner Bros. During the golden age of American animation, his popularity increased. This era led to his becoming an American cultural icon and the official mascot of Warner Bros. Entertainment.
Document 7: Ren and Stimpy (characters): Ren and Stimpy, created by John Kricfalusi, are the title characters in the American-Canadian animated television series "The Ren & Stimpy Show". Kricfalusi created the characters during his stay in Sheridan College and they first appeared on film in the pilot episode "Big House Blues". Ren is a scrawny, violently psychotic Chihuahua, and Stimpy is a fat, stupid cat. They are often at odds with each other on the show, though they do share moments of closeness together.
Document 8: Jimmy The Idiot Boy: Jimmy The Idiot Boy is a cartoon character created and voiced by John Kricfalusi and was the official mascot for Kricfalusi's company Spümcø. He appears, drooling, in the Spümcø logo at the end of pre-1993 "The Ren & Stimpy Show" episodes, alongside the studio's tagline at the time. "The Danes call it quality".
Document 9: Frank Welker: Franklin Wendell Welker (born March 12, 1946) is an American actor, who for most of his career has specialized as a voice actor. 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. He is also well known as both the vocal effects and the voice of Nibbler in "Futurama".
Document 10: William &quot;Billy&quot; Costello: William Arnold "Billy" Costello (February 2, 1898 – October 9, 1971), commonly known as "Red Pepper Sam", was an American live and voice actor, and the original voice of Popeye the Sailor in animated cartoons.
Document 11: The Ren &amp; Stimpy Show: Fire Dogs: The Ren & Stimpy Show: Fire Dogs is a platform game developed by Argonaut Games, and published by THQ for the Super Nintendo Entertainment System in 1994. The game derives from "Fire Dogs" (1991), the eighth installment in the cartoon series "The Ren & Stimpy Show", created by Canadian animator John Kricfalusi.
Document 12: Ren &amp; Stimpy &quot;Adult Party Cartoon&quot;: Ren & Stimpy "Adult Party Cartoon" (A.K.A. "Ren & Stimpy's All New Adult Party Cartoon") was an American adult animated television series created by Canadian animator John Kricfalusi for the cable network Spike (previously known as TNN). The series was an adults-only-reboot, spin-off to the original animated series, "The Ren & Stimpy Show", which had previously aired on the American children's cable network Nickelodeon. It aired from June 26, 2003 to July 24, 2003, when Spike's entire animation block was discontinued. The last 3 episodes remained unaired on the network, and originally intended to end on August 14, 2003, but the 3 episodes are available on Ren & Stimpy "The Lost Episodes" DVD and on a variety of digital platforms and 6 episodes were ultimately cancelled. The series is rated TV-MA for explicit sexual dialogue. The series was produced by Spümcø and Spike Animation Studios. The series utilized Flash animation instead of traditional animation.
Document 13: The Ren &amp; Stimpy Show: The Ren & Stimpy Show is an American animated series created by John Kricfalusi for Nickelodeon. The series follows the adventures of title characters Ren, an emotionally unstable chihuahua, and Stimpy, a good-natured, dimwitted cat. It premiered on August 11, 1991 as one of the original three Nicktoons, along with "Rugrats" and "Doug". Throughout its run, the show was controversial for its off-color humor, sexual innuendo, dark humor, adult jokes, and violence. This controversy contributed to the production staff's altercations with Nickelodeon's Standards and Practices department. The show ended on December 16, 1996, with a total of five seasons and 52 episodes.
Document 14: The Ripping Friends: The Ripping Friends: The World's Most Manly Men! (also known as The Ripping Friends) is a Canadian animated television series, created by John Kricfalusi, who was well known for creating "The Ren & Stimpy Show" on Nickelodeon. The show premiered September 22, 2001 on Fox Kids, but was cancelled in September 2002. Adult Swim later picked up the show. The series occasionally airs in Canada on Teletoon. The series also aired briefly in the UK on the CNX channel and on ABC in Australia. The show was rated TV-Y7 on Fox Kids and TV-PG on [adult swim] in the United States, and C8 to 14+ on Teletoon in Canada.
Document 15: Philip J. Fry: Philip J. Fry, commonly known simply by his surname Fry, (August 14, 1974) is a fictional character and the main protagonist of the animated sitcom "Futurama". He is voiced by Billy West using a version of his own voice as he sounded when he was 25. He is a slacker delivery boy from the 20th century who becomes cryogenically frozen and reawakens in the 30th century to become a delivery boy there with an intergalactic delivery company run by his descendant, Professor Hubert J. Farnsworth. He is the best friend and roommate of Bender and the boyfriend (later on in the series finale) the husband of Turanga Leela.
ground_truth: John Kricfalusi