Question: Hank Azaria joined what cartoon as a voice actor 10 years before acting in Mystery Men?
Context: Mystery Men is a 1999 American superhero comedy film directed by Kinka Usher and written by Neil Cuthbert and Bob Burden, loosely based on Burden's "Flaming Carrot Comics", and starring Hank Azaria, Claire Forlani, Janeane Garofalo, Eddie Izzard, Greg Kinnear, William H. Macy, Kel Mitchell, Lena Olin, Paul Reubens, Geoffrey Rush, Ben Stiller, Wes Studi, and Tom Waits.  The film details the story of a trio of lesser superheroes with unimpressive powers who are required to save the day. Henry Albert "Hank" Azaria ( ; born April 25, 1964) is an American actor, voice actor, comedian and producer.  He is known for starring in the animated television sitcom "The Simpsons" (1989–present), voicing Moe Szyslak, Apu Nahasapeemapetilon, Chief Wiggum, Comic Book Guy, Carl Carlson and numerous others.  After attending Tufts University, Azaria joined the series with little voice acting experience, but became a part of the crew in its second season, with many of his performances on the show being based on famous actors and characters. Lenford "Lenny" Leonard (or Leonard "Lenny" Lenford) and Carlton "Carl" Carlson are two supporting characters in the Fox animated series "The Simpsons", voiced by Harry Shearer and Hank Azaria, respectively.  They are best friends of Homer Simpson and work with him at the Springfield Nuclear Power Plant.  Lenny and Carl are rarely seen apart and have a close relationship.  Each possesses a master's degree in nuclear physics, but are often portrayed as blue-collar working men. "The Simpsons" is an American animated sitcom that includes six main voice actors, and numerous regular cast and recurring guest stars.  The principal cast consists of Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria and Harry Shearer.  Tress MacNeille, Pamela Hayden, Maggie Roswell, Russi Taylor, Marcia Wallace, Marcia Mitzman Gaven and Karl Wiedergott have appeared as supporting cast members.  Repeat guest cast members include Albert Brooks, Phil Hartman, Jon Lovitz, Joe Mantegna and Kelsey Grammer.  With one exception, episode credits list only the voice actors, and not the characters they voice. The Itchy & Scratchy Show (often shortened as Itchy & Scratchy) is a running gag and fictional animated television series featured in the American animated television series "The Simpsons".  It usually appears as a part of "The Krusty the Clown Show", watched regularly by Bart Simpson and Lisa Simpson.  Itself an animated cartoon, "The Itchy & Scratchy Show" depicts a sadistic anthropomorphic blue mouse, Itchy (voiced by Dan Castellaneta), who repeatedly maims and kills an anthropomorphic, hapless threadbare black cat, Scratchy (voiced by Harry Shearer).  The cartoon first appeared in "The Tracey Ullman Show" short "The Bart Simpson Show", which originally aired November 20, 1988.  The cartoon's first appearance in "The Simpsons" was in the 1990 episode "There's No Disgrace Like Home".  Typically presented as 15-to-60-second-long cartoons, the show is filled with gratuitous violence.  "The Simpsons" also occasionally features characters who are involved with the production of "The Itchy & Scratchy Show", including Roger Meyers Jr. (voiced by Alex Rocco, and, later, Hank Azaria), who runs the studio and produces the show. Happy Feet Two is a 2011 Australian-American 3D computer-animated family musical comedy film directed, produced and co-written by George Miller.  It is the sequel to Miller's 2006 film "Happy Feet".  It features Elijah Wood, Robin Williams, Hugo Weaving, Magda Szubanski and Anthony LaPaglia reprising their roles from the first film.  Pink voiced Gloria due to Brittany Murphy's death in 2009, and Richard Carter who portrayed a human character and voiced Barry in the first film, voices Bryan the beachmaster in this one, respectively.  Common also replaced Fat Joe as Seymour.  The original cast is joined by new characters voiced by Hank Azaria, Brad Pitt, Matt Damon, and Sofía Vergara. Edward John "Eddie" Izzard ( ; born 7 February 1962) is an English stand-up comedian, actor, writer and political activist.  His comedic style takes the form of rambling, whimsical monologue, and self-referential pantomime.  He had a starring role in the television series "The Riches" as Wayne Malloy and has appeared in films such as "Ocean's Twelve", "Ocean's Thirteen", "Mystery Men", "Shadow of the Vampire", "The Cat's Meow", "Across the Universe" and "Valkyrie".  He has also worked as a voice actor in "The Wild", "Igor", "", "Cars 2" and "The LEGO Batman Movie". Apu Nahasapeemapetilon is a cartoon character in the animated television series "The Simpsons".  He is the Indian immigrant proprietor of the Kwik-E-Mart, a popular convenience store in Springfield, and is well known for his catchphrase, "Thank you, come again."  He is voiced by Hank Azaria and first appeared in the episode "The Telltale Head". Bartok the Magnificent, directed by Don Bluth and Gary Goldman, is a 1999 direct-to-video spin-off and sequel to the 1997 film "Anastasia", which features Hank Azaria as the voice of Bartok, Kelsey Grammer as the voice of Zozi, and Jennifer Tilly as Piloff.  It is a "family adventure...animated comedy" film, according to Fort Oglethorpe Press. Quiz Show is a 1994 American historical film produced and directed by Robert Redford, and written by Paul Attanasio, based on Richard N. Goodwin's memoir "Remembering America: A Voice From the Sixties."  It stars John Turturro, Rob Morrow, and Ralph Fiennes, with Paul Scofield, David Paymer, Hank Azaria, and Christopher McDonald appearing in supporting roles.
Answer: "The Simpsons"