In Stripperella, for his first appearance the villain Cheapo was voiced by Jon Lovitz; for the remainder of his appearances he was voiced by Maurice LaMarche.
Whatever Happened to... Robot Jones? has an unusual example. Robot was "voiced" by a MacinTalk Junior, then for a reason never explained the producers replaced it with a real voice actor for the remainder of the show, even going back and dubbing his voice over the show's old episodes.
Though technically Archer's Captain Murphy (and there being a Sealab at all) was more a Shout Out to Sealab 2021, Adam Reed being the creator of both shows and was entirely an In Name Only reference.
From Futurama, Robot Santa. On Robot Santa's first episode ("An Xmas Story"), John Goodman (Dan fromRoseanne or Linda Tripp on many a Monica Lewinsky-based political sketch on Saturday Night Live) voiced Robot Santa. The second time Robot Santa appeared ("A Tale of Two Santas"), Goodman wasn't available, so John DiMaggio was cast.
Also on "A Tale of Two Santas," Maurice LaMarche replaced Dan Castellaneta as The Robot Devil because Castellaneta was busy doing voicework for The Simpsons at the time. Fortunately, Castellaneta returned as the voice of The Robot Devil from "The Devil's Hands are Idle Playthings" to the current Comedy Central episodes.
Averted with the entire voice cast when it was rumored that the original voices would be replaced for the new episodes. Fortunately, a deal was made, and the original voices returned.
The entire Latin American voice cast for Futurama (except Dr. Zoidberg and Zapp Brannigan) has been changed for the movies and newly revived episodes, to much controversy. It's not much different from the Latin American Spanish dub of The Simpsons.
The series did this with Chester and AJ (Chester was originally voiced by Frankie Muniz). This became particularly jarring when they once did an episode about a past episode from Chester and AJ's perspective.
Timmy himself is also subject to this — he was voiced by Mary Kay Bergman in the original shorts, but when Bergman suddenly passed away in 1999, Tara Strong took over as his voice in the regular series. She even redubbed his lines in the original shorts when they were shown as episodes of the show (the original versions can be seen on the DVD releases, though).
Dr. Bender (the sadistic dentist) was voiced by Gilbert Gottfried in the earlier episodes. The later episodes have series creator Butch Hartman painfully trying to mimic Gottfried's voice so naive audiences wouldn't know the difference.
Subverted with Cosmo: his voice was much deeper in the shorts, but he was voiced by the same Daran Norris.
The French dub is rather extreme about this, switching from Belgium to Paris after 2005, because Nickelodeon had acquired the rights to future seasons from Nelvana. The Parisian French dub started in 2007.
Because they used real prepubescent voice actors rather than adults that sounded like children, some of the characters on Arthur had many different actors over the course of the series, most notably DW, Brain and Arthur himself. Also, Brain's voice got really deep before they replaced him.
The role of the Griffin daughter Meg in Family Guy was played by an uncredited Lacey Chabert during the first production season and was replaced by Mila Kunis for the remainder of the series. This was lampshaded many times over the course of the series. Once, when Peter warns Lois she could be replaced, he yells "Lacey Chabert!" as a threat. Brian and Stewie also make note of Meg sounding different when they time traveled in a 2012 episode to an earlier episode with Chabert as the voice (where she actually received credit).
Spoofed when Stewie notes that Jim Henson had a "wait and see" attitude about his health, which led to his death and wrong-sounding Muppets (some of which, like Fozzie Bear, actually wouldn't be affected as Jim Henson never voiced him).
Played straight with Death; originally voiced by Norm MacDonald for his first appearance, but then replaced by Adam Carolla for all other appearances, since MacDonald was unavailable.
In her first appearance Lois' sister Carol was voiced by Carol Kane. In her second appearance a decade later, she is voiced by Julie Hagerty.
Same for Lois' brother, Patrick: originally voiced by Robert Downey, Jr. when the show was Un-Cancelled in 2005, the character returned for an episode seven years later and was voiced by Danny Smith.
Played straight in-universe when the Griffin family get their own reality show. After producers realize that Meg is the most unpopular character, they replaced her with a more attractive actress "playing" her. After the family was able to get Meg back, the rest of the family ended up replaced as well. This might have been a minor shout out to Meg's real life recasting.
Also played straight with daughter Roberta Tubbs in the Cleveland Show, who was played by Nia Long in the first production season. When the show resumed production, Long was tied up with other commitments and was replaced with Reagan Gomez-Preston for the rest of the show.
In earlier seasons, the young children were played by the regular voice cast imitating kid voices. In later seasons, they were voiced by actual children.
Akiko from American Dad! was voiced by Grey DeLisle in her first couple of (minor) appearances, but Grace Park took over the role when the character got her first major role in "Best Little Horror House in Langley Falls".
The Simpsons parodied this: on the Season 10 episode, "Homer to the Max" note The episode where Homer changes his name to "Max Power" after his name gets used for a bumbling sidekick character on a cop show — that was originally a dashingly handsome sidekick in the pilot episode, Homer looks over all the new mid-season replacement shows and points out a new animated series called "The Laughter Family," adding that TV networks love animated shows, "...because they don't have to pay the actors squat!"note This aired around the time that the show was facing a pay dispute from the voice actors and the FOX executives threatened to have all the original voice actors replaced with sound-alikes Ned Flanders then walks by the window and, in a noticeably different voice note (provided by Karl Weidergott for the purpose of that joke; Flanders is regularly voiced by Harry Shearer) he says "Plus, you can replace the voices and no one can tell the diddly-ifference!"
The episode "Simpsons Spin-Off Showcase" (mentioned earlier) spoofs this concept to hell and back. One of the spin-offs is "The Simpson Family Smile-Time Variety Hour", and episode host Troy McClure comments that one of the family refused to go along with the idea, but "...thanks to some creative casting, you won't even notice." When the episode starts up, we're greeted by the Simpsons... with a perky blond teenager ("Sophomore prom queen five years running", she calls herself) in place of Lisa.
In real life, all of Maggie Roswell's characters (Miss Hover, Maude Flanders, Helen Lovejoy) were replaced for seasons 11-13 with Marcia Mitzman Gaven while Roswell was out due to a pay dispute (she had moved to Denver and wasn't compensated for her travels between her home and Los Angeles). Roswell returned after being allowed to record her lines from her home studio.
In the episode "Homer's Odyssey" note The one where Homer loses his job at the plant for the first time, is Driven to Suicide after failing to find a new job, and becomes a safety advocate after saving his family from getting hit by a truck on a street that had no traffic signs or lights on it, Burns is voiced by comedian Christopher Collins note "Christopher Collins," in this case, being the real name of Chris "Starscream-Cobra Commander" Latta, but was replaced by Harry Shearer before broadcast, although Collins' voice remained in this single episode. The same thing almost happened to Moe, but Collins' voiced was replaced with Hank Azaria's before broadcast.
Ralph Wiggum was also originally voiced by Jo Ann Harris for a few appearances before Nancy Cartwright took over the role from then on. Harris also initially voiced Wendell (the sickly kid who pukes on the bus), some of Bart's other friends, and Lisa's friend Janey.
Lunchlady Doris was retired as a character after Doris Grau died (she did appear in some episodes between the time her character was retired and the time Tress MacNeille replaced her, but Doris was often seen in crowd scenes). Starting in Season 18, she returned a decade later with Tress MacNeille as her new voice actress.
Troy McClure was almost always voiced by Phil Hartman, except in "Bart Gets An F" where Dan Castellaneta (the voice of Homer) took over for a brief scene; like the above, the character was retired after Phil Hartman's murder.
Homer's mother was voiced by Glenn Close in three episodes (four if you count a deleted scene appearing in "The Simpsons 138th Episode Spectacular"), but in her other minor appearances, she's been voiced by both Maggie Roswell and Tress MacNeille.
In Latin America, the entire show was recast after Season 15 to intense public outcry, so much so that it's the most frequently cited reason for the show's downfall, despite other reasons. Behind the scenes, the show's dubbing studio closed, and the new studio opted not to pay for the original actors' union salaries (very similar to what happened to Pokémon in English). Given "Los Simpson"'s popularity in Latin America, it's controversy cannot be underestimated. The original voice actors' union (and the fans) made a push for them to return for the movie, but unfortunately, Fox recorded it with the replacement cast without the original voices' knowledge. Thanks for the 15 years of hard work!
It gets better. Bart was already Other Darrined after his voice actress, Marina Huerta, left the show after Season 9 over a pay dispute. When the cast changed after Season 15, Huerta not only returned to voice Bart, she's now also Marge's voice.
In the European Spanish version, Carlos Revilla, the voice of Homer, passed away after recording Season 11. He was replaced with Carlos Ysbert afterwords. Marge's voice has also changed twice in this dub presumably due to the strain the throatiness causes.
Marge's German voice actress Elisabeth Volkmann died in the middle of season 17, and she's replaced by the VIP Anke Engelke who doesn't try to immitate Volkmann's performance, but Julie Kavner's, Marge's original voice actress from America.
Patty and Selma were voiced by two different women in season two, then Volkmann voiced them in season 2 onwards until her death, and another woman voices them.
Abraham Simpson has four different German voice actors. The first died after season 8, the second died after season 10, the third died after season 15.
A lots of German voice actors were replaced throughout the series. The only exceptions are the voice actors of Homer, Bart, Lisa, Maggie, Mr. Burns, Ms. Hoover, Krusty, Moe, Dr. Monroe and Manjula.
Literally everyone in the Brazilian Portuguese cast has had at least two or three voices.
Mary Kay Bergman, who did most of the female voices on South Park, died during production of the show's third season, not long after recording her dialogue and the Bigger, Longer & Uncut movie had been completed. Eliza Schneider was hired to replace her, starting with the season 3 episodes Bergman hadn't yet recorded for, and she herself was later replaced by April Stewart after season 7 (with Mona Marshall already handling some of the other roles, most notably Sheila Broflovski) when she had troubles with her union/salary.
Counting the pilot, Wendy's had quite the voice changes: Karri Turner voiced her in the unaired pilot, then Mary Kay Bergman (first under the alias Shannen Cassidy) voiced her until her suicide during the aforementioned third season. In the following year, Eliza Scheider took over the role and continued until the end of the seventh season (with some fans initially mistaking the Wendy role as Mona Marshall's). April Stewart (nee Gracie Lazar) has been the current voice for her since the eighth.
Some of the minor female classmates (that aren't Wendy or Bebe) have had their voices shift about by episode, depending on April Stewart's availability note Such as her being ill during "Marjorine" and having only recorded her lines for Wendy and the creators utilizing other actresses to cover other roles either due to that or to spread out the cast. In those cases, Mona Marshall, Jessica Makinson, and Paula Holmberg have covered for her.
In fact, there is only ONE major female character that has not had any voice chances, not even being voiced by Bergman: Bebe Stevens, who has been voiced by Jennifer Howell from her first appearance note Though Howell was initially left uncredited in "Weight Gain 4000", leading some fans to mistakenly assume that Bergman was Bebe's voice actress there, a misconception that sometimes persists.
Token was initially voiced by Trey Parker in minor speaking lines given to him in season 3, but Adrien Beard became his official voice actor when he received more prominent speaking parts (starting with season 4).
The youngest of the goth kids was initially voiced by Nico Agnone. After Agnone hit puberty, the role was given to Sebastian Yu.
Clyde's mother was initially voiced by April Stewart, but would wind up voiced by Trey Parker in "Reverse Cowgirl". This was due to Stewart being unavailable to re-record her lines after changes were made to the script.
Ike Broflovski has went through at least nine confirmed voice actor changes, though it is justifiable and understandable due to the fact that he's always meant to be voiced by actual children (usually a child of a production staff member). This is usually averted in most foreign dubs, where he's instead voiced by adult women.
Terrance is usually voiced by Matt Stone, while Phillip is voiced by Trey Parker. But in their very first appearance (in "Death"), the voice casting was reversed, with Stone as Phillip and Parker as Terrance.
Scott Tenorman was originally voiced by Toby Morton, but was later voiced by Trey Parker in his return appearances in the "200"/"201" two-parter.
The Spanish-language Latin American dubs have had many cases of recasting, but it would take too long to list all of them. To sum up the situation, the show has been passed around to various studios and localization teams, with an overhaul in the voice cast coming every few seasons or so. Some of the earlier dubbed episodes have even been redubbed for consistency with the current voice cast, making it even more of a challenge (though this Spanish wiki attempts to catalogue the numerous changes). A few notable examples include:
Stan was voiced by Larry Villanueva in the original BVI dub (and later redub) of seasons 1-2. After Villanueva took a hiatus from voice acting to work in film, he was replaced by Miguel Paneke in seasons 3-7, and Sergio Saez in seasons 8-9. He would return for the dub of seasons 10-15, but retired from the show due to being busy and not wanting to commute to the new ADR studio. Orlando Noguera was then cast as Stan for the following season.
Kyle AND Cartman were both initially voiced by Vivian Ruiz, but she quit after BVI's second season due to the strain put on her vocal cords from trying to do the "Cartman" voice. The two have since been consistently voiced by Patricia Azan.
Kenny was initially left undubbed through the Latin American adaptations of seasons 1-11, but the actor Orlando Noguera was cast as his official voice starting with season 12. This was a somewhat controversial decision, as Noguera did not muffle his voice, allowing viewers to hear the dialogue. The role was then recast with the sixteenth season, as Noguera took on two other roles (Stan and Butters). He was replaced by Diego Osorio.
A short-lived dub that aired in Mexico around 1998 (simultaneously with BVI's first dub) had Stan first voiced by Carlos Inigo, before he was replaced by Eduardo Garza for the second season. There were also two competing dubs of the movie that were produced in Mexico. While the first retained the cast from the aforementioned adaptation of the series, a dub for pay TV recast several parts, most notably Kenny and Wendy (who respectively went from being voiced by Irwin Daayan and Maria Fernanda Morales, to Victor Ugarte and Gaby Willert).
In the case of the Japanese dubbing situation for the series, the satellite station WOWOW had a dub that aired through 1999-2004, before they lost the broadcasting rights. In this version, Cartman was voiced by a Japanese-Swedish actress named LiLiCo, while the other three boys were cast with male actors, with Kappei Yamaguchi voicing Kyle and Stan voiced by Hiro Yuki. While the WOWOW dub had started production, the movie (released in 2000) wound up handled by a different localization team, who presented a reverse casting situation: Stan, Kyle, and Kenny were voiced by women (respectively Yuki Ueda, Kaoru Kusumi, and Junko Katayama), while Cartman was the one to wind up voiced by a man (Tetsuya Yanagihara). These actors were more obscure, and the rest of the cast of the film dub is unknown due to the lack of credits. After FOX BS238 briefly picked up the broadcasting rights in October 2011, they produced a dub of season 8 which recast all the characters.
The WOWOW version first had Chef voiced by the actor Nobuaki Kondo (under the alias BRO-Kone) for seasons 1-5, but by Masahiro Kobayashi for the last two seasons.
Ike was initially voiced by a child actor named Hiroshi Tanaka for the first three seasons, but was replaced by another actor (Takashi Hirano) for seasons 4-7.
Jesus was first voiced by the actor Masaya Nakagawa (under the alias "Lily Franky") for seasons 1 and 2, but was replaced by Masayuki Nakata in season 3.
In the switchover from WOWOW to FOX, most of the female roles went from being voiced by Noriko Suzuki to Hana Takeda. The exception was Wendy Testaburger, who was now voiced by Ema Kogure.
Pip was usually voiced by Mitsuru Ogatanote who also voiced Kenny and other roles in WOWOW's dub, except for the dub of "Cartman Gets An Anal Probe", where Noriko Suzuki voiced him instead note she voiced Wendy and most other female characters in the dub, along with a few male roles such as Kevin Stoley, Dog Poo, and Kenny's brother named Kevin. In a reverse of that situation, while Butters was best known for being voiced by Noriko Suzuki in that dub, his early lines in season 2note while he was still a background character with a different voice, and may or may not have still been voiced by Matt Stone were voiced by Mitsuru Ogata.
The dub produced in Spain used an entirely different cast between the movie and TV series, due to the movie being handled by Tecnison and the series being handled by Abaira. Margarita Ponce, who voices Cartman in the series, instead wound up voicing Stan's mother while the Cartman role was given to Eduardo del Hoyo. Besides Cartman, the main boys are all voiced by women in the series: Stan by Chelo Vivares, and Kyle and Kenny by Sara Vivas. In the movie, they had male dubbers: Kenny had Adolfo Moreno (who would later voice Scott Tenorman), Stan was Miguel Angel Varela, and Kyle's dubber was Pablo Sevilla.
Bebe was originally voiced by Isacha Mengibar (who also voiced Wendy and Ike), but at some point was voiced by another actress, Celia de Diego.
The Brazilian dub had its movie and series handled by different localization teams (Cinevideo for the film, The Kitchen Inc. and BVI for series note Both companies were also responsible for the later Latin American Spanish dubs of the series). As with the film dub in Spain, the boys (save for Kenny) had male actors voicing them, while the series had them voiced by women (save for Kenny). As with the Latin American dub and the Ukrainian dub, Kyle and Cartman coincidentally share the same voice actress (Marta Rhaulin in this case).
The Italian dub switched cities after season 4 from Rome to Turin. As such, the entire cast was replaced and the original seasons were redubbed.
Buzz Lightyear of Star Command has two different voice actors for XR, Larry Miller and Biil Flynn. The two men trade places seemingly at random from episode to episode with no acknowledgement of a change. To be fair, the metallic effect applied to the voices makes them sound identical at first, until you get to know the character and realize he has a disappearing accent.
Interestingly, another character has the same voice actor throughout the series but sounds different in every episode.
Buzz himself counts for this. "The Adventure Begins" film that started the series saw Tim Allen reprise his role from the Toy Story films. When the actual series began Buzz was now voiced by Patrick Warburton, who also proceeded to dub over Allen for the edited, multi-part version of "The Adventure Begins."
In The Superhero Squad Show, Jane Lynch from Glee voiced Thanos' sister Nebula, but when she became unavailable to record more episodes, the creators found an interesting way to work around this. In each of Nebula's subsequent appearances, she was either gagged or had her mouth removed entirely, allowing an uncredited actress to easily replace Lynch simply by doing muffled "Mmmph" noises.
The Flintstones recast everyone except for Wilma after the original 5-minute pilot. For the main TV series, Betty (originally voiced by Bea Benaderet) was replaced with Gerry Johnson for the final two seasons of the main show, as well as the movie. Johnson left shortly after the series, and Betty has been voiced by a number of actresses since. Alan Reed, Fred Flintstone's original voice, did Fred's voice on the debut episode of Scooby's All-Star Laff-A-Lympics. He died soon after and would be replaced in Fred's appearances on the show by Henry Corden, who would be his regular voice from then on. The voice of Barney Rubble was originally provided by Mel Blanc, then briefly by Daws Butler while Mel was in the hospital. Then when Mel came back, he Other Darrinned himself by using a different voice style to better match Butler's (one episode even had Daws Butler's Barney voice replaced by Mel Blanc's in the middle of the episode).
In The Venture Bros., minor character Prof. Richard Impossible was voiced by Peter McCulloch in the pilot, Stephen Colbert in the first two seasons, Chris McCulloch (Jackson Publick) in the third season, and Bill Hader in the fourth season.
Publick also took over the voice acting duties for Sgt. Hatred in Season 3, who was voiced by Brendon Small during his first appearance, due to the fact that Brendon Small was busy working on Metalocalypse.
Both Dr. Girlfriend and Billy Quizboy were voiced by Chris McCulloch in the pilot episode, but by Doc Hammer on the rest of the show.
Dean went through two voice actors in the short-lived Latin American dub: Luis Enrique Pojan for season 1, and Eder La Barrera for season 2 (Pojan had retired in 2007 and moved from Venezuela, where the dub was produced, to Spain).
Danielle's voice in Danny Phantom replaced original voice actor Annasophia Robb with Krista Swan when she reappeared a second time. Valerie Gray's voice was given by Grey DeLisle while she was a minor character before Cree Summer took over when she jumped into a larger role.
Several voices in Doug switched when it went from Nickelodeon to Disney, including the title character's. Billy West played Doug in the Nickelodeon version. The Disney version has Thomas McHugh as the new voice of Doug. Roger the bully went from also being voiced by Billy West to being voiced by Chris Phillips. Billy West apparently left the show when Disney refused to match Nickelodeon's salary (he has since criticized McHugh's performance). As the first episode of Disney's version was about Doug's aversion to change, Skeeter's eventual lampshading was inevitable.
In The Ren & Stimpy Show, John Kricfalusi was the original voice of Ren. After Kricfalusi was fired over censorship issues and turning in late work, Billy West took over the role of Ren in addition to his role as Stimpynote It's interesting to note here that Billy West has stated that he had originally recorded both voices for a demo pitch to Nickelodeon, but when the show started being made, John K. ended up taking the part of Ren for himself. After John was fired, Billy took the parts of both characters as originally pitched.
In the short-lived Adult Party Cartoon spinoff, Stimpy was voiced by Eric Bauza instead of Billy West (while John K. returned to voicing Ren). West has hated John K. ever since the two worked together on the original Ren and Stimpy — and the hatred worsened when West saw plans for the revival series and expressed how disgusted he was of it. He also felt working on the show would damage his career.
Many characters from classic Disney movies have new voices for their latest appearances such as the show House of Mouse and the Kingdom Hearts video games (for obvious reasons, since most of the original actors are either retired or have been dead for years).
Belle was usually voiced by Paige O'Hara. However, during her House of Mouse incarnation, she was actually voiced by Jodi Benson (who coincidentally was one of the first voice actresses considered for the role of Belle during the development of Beauty and the Beast). On a related note, all of the Triplets/Bimbettes were voiced by Kath Soucie (who originally only voiced the green one) after Mary Kay Bergman (the voice actress who voiced the red and yellow bimbettes/triplets) passed away.
A notable exception to the rule is Hades from Hercules. James Woods has said Hades is his favorite character to portray and that he loves the role so much he'll play it at any salary whenever Disney needs it until the day he dies.
In the direct-to-video sequel to Brother Bear, Joaquin Phoenix did not return to voice Kenai. He was instead voiced by a popular actor already under contract with Disney (through his role at ABC's Grey's Anatomy)... you guessed it, Patrick Dempsey.
Mostly averted by the DTV sequel to The Hunchback of Notre Dame, which brings back almost all the main voice cast except for David Ogden Stiers (replaced by Jim Cummings) and the late Mary Wickes (Jane Withers, who filled in for her in some parts of the movie, took over in full).
Characters from the Classic Disney Shorts also had voice acting changes, mostly due to death. Mickey notably had four official voice actors: Walt Disney, Jim MacDonald, Wayne Alwine, and Bret Iwan. Donald has two, Clarence "Ducky" Nash and Tony Anslemo. Goofy had several voice actors (one of which is Pinto Clovig — the voice of Grumpy and Sleepy on Snow White and the Seven Dwarfs, the third little pig on the Tex AveryWorld War II cartoon "Blitz Wolf", and the original actor who played Bozo the Clown), but is currently voiced by Bill Farmer.
The same thing happened with the Looney Tunes characters, who have had many different voice actors after Mel Blanc died (aside from Granny and Witch Hazel, of course).
An interesting example involving Blanc. The character of Elmer Fudd was originally voiced by (and physically modeled after) portly actor Arthur Q. Bryan. In the classic "What's Opera Doc?" Bryan voiced Fudd as usual, except, during the part where Fudd summons various types of weather to attack Bugs, the word "Smog!" was done by Blanc. Hal Smith took over for a while, and then Mel Blanc took over permanently, and is now voiced by a number of voice actors in different media.
Porky was originally voiced by Joe Dougherty, who actually had a stutter and was fired because he couldn't keep it under control long enough to stay in character. When Mel Blanc took over, the character kept his trademark stutter.
Speaking of Mel Blanc's Looney Tunes characters being vocally replaced, The Looney Tunes Show only has June Foray and Stan Freberg play the characters they were known for in the classic cartoons (Granny for Foray and Pete Puma for Freberg). The rest of the characters (most of which were voiced by either Mel Blanc, Arthur Q. Bryan, Sarah Berner, or Bea Benedaret — all of whom have died) now have these actors as their voice artists:
Jeff Bergman as Bugs Bunny, Daffy Duck, and Foghorn Leghorn.
Joe Alaskey as Sylvester the Cat, Tweety Bird, Henery Hawk, Beaky the Bashful Buzzard, Cecil Turtle, and Hubie the Mouse (with Bertie voiced by Frank Welker).
The voices for Scooby-Doo have gone through a large roundabout over the years.
Daphne was the first Scooby-Doo character to be recast. Her original voice actress, Stefanianna Christopherson, left the show before the end of the first season of the original series (17 episodes) to move to New York to get married, and opted not to reprise her role for the second season. The role was recast with Heather North (the then roommate of Nicole Jaffe, the voice of Velma). North continued to voice Daphne in all media until 1998 (with the exception of A Pup Named Scooby-Doo from 1988-91, where she was voiced by Kellie Martin) when the character was recast again, this time with Mary Kay Bergman. Bergman suddenly passed away in 1999, after voicing Daphne for 3 direct-to-video movies. Since then, Grey DeLisle has voiced Daphne in all media (except for two DTV movies in 2002-2003 in which Heather North briefly returned).
Velma was originally Nicole Jaffe up until the 1976 series, The Scooby-Doo Show in which she declined to reprise her role, and the character went to Pat Stevens, who voiced Velma throughout the entire run of that show, as well as in the Scooby Goes Hollywood movie, her appearances in Dynomutt Dog Wonder, and the first 11 episodes of The Scooby-Doo and Scrappy-Doo Show. Velma then had a bizarre recasting with Marla Frumkin, who gained a very notorious reception among fans because of her very awkward line delivery. Frumkin played Velma in the last four episodes of that series and two cameos throughout the 80's. From 1988 to 1991, Velma was voiced on A Pup Named Scooby-Doo by Christina Lange. When Velma appeared in her normal form again in 1997, BJ Ward took over the role, and voiced Velma in all media until 2002 when Nicole Jaffe assumed the role again for two DTV movies, and since 2002, Mindy Cohn has voiced Velma in pretty much all other media (doing a Nicole Jaffe impression). Cohn was later nominated for an Emmy for her voicework as Velma in 2005.
Shaggy was Casey Kasem for years until he quit the role in 1998 after refusing to voice the character in a Burger King commercial (Kasem is an avid vegetarian). Billy West briefly voiced Shaggy for Scooby-Doo on Zombie Island before the role was recast again in 1999 with Scott Innes. Kasem returned to voice Shaggy in 2002, and continued to voice him until his retirement in 2009 (though Scott Menville briefly played the character in "Shaggy & Scooby-Doo Get a Clue!" when Kasem played Shaggy's uncle). Since then, Matthew Lillard (who played Shaggy in the two live-action theatrical Scooby Doo movies) has been the voice of Shaggy.
As for Scooby-Doo himself, he was voiced by the late great Don Messick until his retirement in 1996. Hadley Kay briefly took over the role for ads, commercials, and his guest appearances on Johnny Bravo in 1997. Scott Innes then took over the role in 1998, and voiced Scooby in all media until 2002 when Frank Welker was cast. Welker has been the official voice of Scooby ever since.
To date, the only voice actor to ever play Fred is none other than Frank Welker!
Certainly the only one to play regular Fred, but Carl Stevens played a 10-year-old Fred in A Pup Named Scooby-Doo.
Not even Scrappy has been safe from this! His original voice actor, Lennie Weinrib, left the franchise over pay concerns shortly after the original Scooby-Doo and Scrappy-Doo Show, and was replaced with Don Messick in pretty much all media until the character was written off the franchise. When Scrappy re-appeared in later media such as commercials, and his role as a villain in the live action movie, Scrappy has been voiced by Scott Innes.
A brief in-series example: At one point, Mozenrath's voice actor Jonathan Brandis was unavailable, so he ended up being voiced by Jeff Bennett for one episode. Brandis returned as Mozenrath's voice in subsequent episodes.
Played straight, parodied and lampshaded in ReBoot. When Bob returns from being lost in the net in Season 3, he has a new look and a new voice actor. In Season 4, a second Bob, supposedly the User's backup, with the original look and voice shows up, and Dot notes he sounds more like the "real" Bob. She nearly marries this Bob, but of course he was Megabyte in disguise using his new TrojanHorsecapabilities.
Played straighter with Hack, who was originally voiced by Phil Hayes, but was changed to Scott McNeil midway through season 2.
After the actual series began, Arturo was recast with Tom Kenny after Carlos Alazraqui voiced him in his first appearance.
The original Whoopass Stew! short, due to its status as a student film, had a voice cast made up of series creator, Craig Mc Kracken's college friends, including a then unknown different actress for all three of the girls by name of Jennifer Freid (to be fair, they spoke in unison all but once). The Amoeba Boys were also voiced by animator Lou Romano, who would later voice the father bird in "A Very Special Blossom" in the actual series.
The three incompleted shorts of that series (featured in storyboard form on the DVD set with the original voice recordings) also had different voices. Rob Renzetti voiced Mojo Jojo, and HIM (then called simply "The Devil")'s voice was provided by Zeke Kare. In addition, Craig McKracken himself narrated all four shorts. Genndy Tartakovsky also voiced a minor character.
In The Real Ghostbusters, the characters of Janine, Peter and Winston all switched to new voice actors at around the third season. Reruns of episodes from the first two seasons even had the characters redubbed for consistency (although the DVD release uses the original versions). Janine's was the most interesting case, in that her original rather abrasive look/voice were drastically toned down when the switch happened (which was due to Laura Summer moving on with her career, and the character being toned down with Kath Soucie as the voice), and this fact was then belatedly used as the plot in an episode, "Janine, You've Changed." It was retconned that Janine had made a deal with an evil spirit to cause the change, only nobody noticed until a character accidentally came across "before and after" photographs.
Funnily enough, by the time of the Extreme Ghostbusters, she had reverted back to her old abrasive style, though it was yet another actress in the role (Pat Musick).
Peter Venkman wound up recast from Lorenzo Music to Dave Coulier, allegedly because Bill Murray had wondered why Music sounded nothing like him (although the person responsible for the change was the producer Joe Medjuck). Coulier would go on to voice Venkman in his Extreme Ghostbusters cameo.
While Janine and Peter were recast with season 3, Arsenio Hall continued voicing Winston until the following season, when he left due to being busy with his talk show. Buster Jones was then cast as Winston, and voiced him for the remainder of his appearances.
The Stay-Puft Marshmallow Man had his vocal effects provided by Frank Welker in season 2, but by John Stocker in season 3's "Sticky Business". Welker would then reprise Stay-Puft for his final cameo in season 5.
Shortly after Dexters Laboratory came back from a long 3-year hiatus, Christine Cavanaugh left the series due to a custody battle over her children after she divorced her husband, and quit acting altogether. Candi Milo, who was hired to replace her as the voice of Dexter, sounded absolutely nothing like the original (Milo also voiced Dexter on the series finale of Time Squad in which Larry and Tuddrussell try to find a replacement orphan for Otto after losing him on a trip to 2001 to stop George W. Bush from making the world's biggest ball of twine).
In addition, Dee Dee's voice switched from Allison Moore to Kat Cressida after the first 13 episodes when Allison wanted to focus on her live-action/stage work. When the show returned from the hiatus, Allison returned to play Dee Dee for another season since Genndy Tartakovsky wanted to focus on changing a few voices around. Kat Cressida returned to the role again after a season at the request of Cartoon Network who felt viewers were most used to her.
Ed, Edd n Eddy had a couple cases of this. Nazz was originally voiced by Tabitha St. Germain for the character's first appearance, and was subsequently replaced by Erin Fitzgerald, the voice of May Kanker. Fitzgerald left the show after the second season to move to the US, and she herself was replaced by Jenn Forgie for Season 3 for both characters. The creator of the show was so much in love with Fitzgerald's take on the roles, that he demanded she return for the shows fourth season onwards. Most of Jenn's dialogue was later re-recorded before her episodes were broadcast.
Strange variation on Regular Show: Jeff Bennett voiced High-Five Ghost in his first two speaking roles, but show creator J.G. Quintel (also the voice of Mordecai) took over not long afterward. However, Bennett has stayed on to voice background characters.
In Recess, most of the child characters were done by children, and all of the main six kids (save for Spinelli) were all done by kids. While the boys all kept their voices even after their actors went through puberty (except Gus, whose voice never broke), T.J. had to be replaced three times, because even after his voice actor went through puberty, the voice didn't work for his character anymore. Ross Malinger played him in the 1996 pilot (re-made into the first episode) and all of Season 1, Andy Lawrence (Joey Lawrence's younger brother) played him from Season 2 until the end of the show, and Myles Jeffery played him in the two direct-to-video movies released two years after the series ended, any further projects (station IDs for Disney Channel/Toon Disney, etc) as well as the Lilo & Stitch: The Series crossover episode.
This happened in Sabrina: The Animated Series when it became Sabrina's Secret Life. Emily Hart (Melissa Joan Hart (the live-action Sabrina)'s younger sister) played her in the regular series, only to be replaced by Britt McKillip for the spin-off. Nick Bakay was replaced by Maurice LaMarche as the voice of Salem, and Hilda and Zelda got replaced as well (from both being voiced by Melissa Joan Hart herself to Moneca Stori and Jane Mortifee respectively). The only character without a voice switch was Harvey, whose voice actor continued doing his voice, but made his voice a little lower. The changes were due to Bunea Vista and Melissa Joan Hart no longer producing (as well as pre-production companies Savage Studios and Jumbo Pictures leaving), leaving DiC by themselves to have to hire a new production and voice team.
In the TV movie, Sabrina: Friends Forever, where the "Secret Life" voice actors made their debuts, Louis Chirillo and Tina Bush voiced Salem and Zelda instead of Maurice LaMarche and Jane Mortifee respectively.
And of course, Ashley Tisdale will be taking over the title role in the new adaptation.
In Here Comes Garfield, the first animated special of Garfield, Sandy Kenyon voiced Jon Arbuckle. Thom Huge, an associate and friend of Garfield cartoonist Jim Davis, took over the role for all other Garfield specials and the TV series Garfield and Friends (where he also voiced Roy Rooster and several other characters). Jon is now voiced by Wally Wingert in the CGI Garfield films and The Garfield Show.
The first VA for Garfield was Scott Beach, done for a cat food commercial. Lorenzo Music voiced him from Here Comes Garfield through the end of Garfield and Friends, and for subsequent appearances until his 2001 death. Frank Welker took over for the aforementioned CGI films and The Garfield Show, while Bill Murray voiced him in The Movie.
In Sponge Bob Square Pants, Man Ray's first appearance in "Mermaid Man and Barnacle Boy V" was voiced by Guy Siner and John Rhys-Davies. Man Ray's subsequent appearances have been voiced by Bob Joles.
Donald Duck's nephews were voiced by Russi Taylor in DuckTales, and she would go on to voice them in later movies and video games. However, in the Mickey Mouse Works shorts and House of Mouse, the nephews are instead voiced by Tony Anselmo, who also voices Donald himself (this is probably to match how Clarence Nash voiced the nephews in the original shorts).
Speaking of Chowder, the title character's voice actor (Nicky Jones) voiced Gumball in the pilot for The Amazing World of Gumball. When the show moved to series, he was replaced by Logan Grove.
Also, Rupert Degas voiced Mr. Small, Tobias, Banana Joe, Alan, Mr Robinson and several others in Season 1, with Hugo Harold Harrison taking over in Season 2.
Lewis Macleod also left. Since the characters outside the Watterson family don't have credits specifying which voice actor they're played by, who voices who is extremely hard to tell now.
Logan Grove and Kwesi Boakye (Darwin) are replaced by Jacob Hopkins and Terrell Ransom Jr., respectively, in Season 3 due to the former two's voices changing (especially Logan).
The entire voice cast for the Bratz animated series was replaced for the second series (following a long hiatus). The voice actors used in the first series of episode were ones common in most western animation such as Dionne Quan, Lacey Chabert and celebrity Wendie Malick. Season 2 and beyond's cast consists of Vancouver based voice actors such as Maryke Hendrikse, Britt McKillip, Brittney Irwin, Ashleigh Ball, Kelly Sheridan and semi-celebrity Ellie Harvie taking over Wendie Malack's role.
The narrator for The Dreamstone was Peter Craze in Season 1, he was replaced by Gary Martin afterwards. The replacement is surprisingly similar considering the latter also voices Zordrak. Urpgor's voice actor also changes for the final season.
Captain Planet and the Planeteers changed the majority of the voice cast after the first season because the originals were rather high profile and cost more to use. Some examples:
Originally, Tom Cruise (yes, exactly the one you're thinking of) was to be cast as Captain Planet, but because the show's budget wasn't enough for a high-profile actor, he backed out and role was quickly recast with David Coburn.
Whoopi Goldberg was the voice of Gaia, the Spirit of the Earth, from 1990 to 1993. From 1993 to the show's end in 1996, Goldberg was replaced by Margot Kidder.
David Rappaport was the original voice of MAL (Dr. Blight's computer) during the first season in 1990. He was replaced by Tim Curry in 1991 after he passed away.
Jeff Goldblum originally voiced Verminous Skumm, but Maurice LaMarche replaced him for the rest of the series.
Duke Nukem was voiced by Dean Stockwell from 1990 to 1992, and by Maurice LaMarche for the remaining seasons.
Martin Sheen voiced Sly Sludge from 1990 to 1993, while Jim Cummings voiced the character from 1993 to 1995.
Zarm was originally voiced by Sting in his first appearances, but was voiced by David Warner in 1993, and finally by Malcolm McDowell.
Looten Plunder's original voice actor was James Coburn (no relation to David Coburn) until he was replaced by Ed Gilbert.
The Mexican Spanish dub also had several voice actor changes over the course of production. While Audiomaster 3000 handled the first season and two episodes of season 2, Salgado Productions handled the rest of the dubbing. As with South Park, an attempt has been made to sum up all the changes. Captain Planet went through at least three voice actors, as did most of the Planeteers (save for Gi).
Before Megas XLR became a full-fledged series, the voice of Gorrath was Mick Foley (yes, that Mick Foley) in the short "Lowbrow". When "Lowbrow" was reworked into the first episode of Megas XLR, Clancy Brown took over as Gorrath's voice.
Twinkleshine has had up to four confirmed voices. When she first speaks in the first episode, three actresses did her voice because of a mistake by an animator. (Three ponies were present in the scene, for the three characters in the script, but only Twinkleshine's mouth was animated to the words.) When Twinkleshine speaks again in "A Canterlot Wedding - Part 1", she's voiced by Andrea Libman.
Johnny Test: Dukey's voice actor changed from Louis Chirillo to Trevor Duvall in the fifth season when Louis moved to Brazil, resulting in much controversy. Fans still apparently have a hard time accepting that Dukey's voice has changed.
Trevor also took over Louis' role of Mr. Henry Teachman, and Bill Mondy replaced Louis as Brain Freezer.
Mary Test started out being voiced by Brittney Wilson, but Ashleigh Ball took over the role in Season 2. Brittney Wilson returned to the role for Season 5 after Ashleigh Ball finished the role for Season 4. Ashleigh Ball would return to the role after Season 5.
The two actresses also share the roles of Sissy and Missy Bladely in similar fashion, and Maryke Hendrikse filled in for Brittney once as Mrs. X and Mrs. Z.
In 101 Dalmatians: The Series, Lucky frequently switched off from being voiced by Pamela Segall-Aldon and Debi Mae West (Possibly the latter was used when the former wasn't available.)
"Team Umizoomi" has Milli and Door Mouse. Milli's current voice actor is Madeline Rose Yen (previously voiced by Sophia Fox). Door Mouse was voice by Joe Narcisco before Chris Phillips took the role. The voice change was obvious in Door Mouse, but very seldom in Milli.
The Scorpion was originally voiced by Martin Landau for the first two seasons. After he won an Oscar for Ed Wood, Landau was unavailable to continue voicing the character and the role then went to Richard Moll (probably best known to animated fans as the voice of Two-Face in Batman: The Animated Series).
Aunt May was voiced by Linda Gary for much of the series' run (reprising her role from an earlier adaptation). After her death, Julie Bennett provided her voice for the rest of the show.
Raphael was voiced by Rob Paulsen for the majority of the series, but for two season three episodes he was handled by Thom Pinto, in the "Europe Vacation" season he was voiced by Hal Rayle, and in the tenth and final season he was voiced by Michael Gough.
Whenever Barry Gordon was unavailable during some third season episodes as well as a few in the "Europe Vaction," his characters of Donatello and Bebop were instead voiced by Greg Berg.
Shredder was voiced by James Avery most of the time, but for a couple episodes of the third season he was voiced by Dorian Harewood, in most of the "Europe Vacation" season he was voiced by Jim Cummings, after Avery left the series in the middle of season seven, Townsend Coleman provied his voice for the rest of it, and for seasons eight-ten (the "Red Sky" ones) he was voiced by William E. Martin.
There were also two real life examples of this on the show. Poison Ivy was originally voiced by Jennifer Hale, but was replaced by Vanessa Marshall in her major role in the teaser segment of "The Mask of Matches Malone". Katana was initially voiced by Vyvan Pam, but was replaced by Kim Mai Guest for all her subsequent appearances.
Also done with Two-Face: he was voiced by James Remar in his first appearance, his TAS voice actor Richard Moll (Bull the bailiff on Night Court) in his second, and by Remar again in his third.
The Made-for-TV MovieThe Point manages to have three Other Darrins in spite of being, well, a movie; for its initial airing the movie was narrated by Dustin Hoffman, but for contractual reasons he was replaced on later (and, outside North America, all English language) airings by Alan Barzman initially and then Alan Thicke, with the VHS (and later DVD) release narrated by Ringo Starr.
Ben 10: A comprehensive list would be impossible. Ben, Gwen, and Kevin changing between the original series and Alien Force are due to the characters growing up, but the overwhelming majority of main and recurring characters and Ben's alien forms change actors between the original series and Alien Force\Ultimate Alien, and then from Ultimate Alien to Omniverse, with no in-universe change. With most characters, the voice style remains the same (from AF\UA to Omni, Azmuth goes from sounding almost exactly like Odo to exactly due to actually having his VA), sometimes not (you'll hardly believe Vilgax is the same character between the original and AF. Also, day-one Azmuth had a high-pitched voice.) Somehow, Grandpa Max (Paul Eiding), Hex (Khary Payton), Charmcaster (Kari Wahlgren), and Dr. Animo (Dwight Schultz) have managed to sneak through with the same voice actor from day one 'til now.
Superjail has had a few examples with minor characters:
Jared's Distaff Counterpart Charise was originally voiced by Kamala Sankaram in "Ladies' Night". In subsequent appearances, she's been voiced by Sally Donovan.
Some of the Ultraprison inmates were voiced by Kamala Sankaram in the above episode, with Sally Donovan voicing others. All Ultraprison inmates were voiced by Donovan in "Stingstress".
Bruce was voiced by a woman named Melissa Brown when he originally appeared, but was later voiced by Chris McCulloch starting with "Stingstress", as Brown had either retired or was otherwise unavailable.
The Time-Police were also recast for their cameo in season 3, with one of them (the lead singer) originally having been voiced by Reggie Watts while his main partner was voiced by McCulloch. In the "Oedipus Mess" cameo, McCulloch voices one patroller while Stephen Warbrick appears to have voiced the other. The designs are identical to the original Time Police characters, but given the show's love for re-using designs and stock footage, they may have also been intended to be different ones.
Keith Szarabajka was the initial voice of Trigon in Teen Titans, though the character was voiced by Kevin Michael Richardson when he became upgraded to the main villain for season 4. The creators explained the change by stating that the first Trigon was only meant to be Raven's mental manifestation of him, so they could easily recast the character.
While Lauren Tom voiced Jinx and Gizmo in most of their appearances in the show, Tara Strong filled in for both characters when it came to the episodes "Revved Up" and "Titans Together" in the final season.
Jay Johnston is missing from some of the third season Moral Orel episodes, so some of his characters (like Coach Stopframe and Miss Censordoll) are voiced by David Herman and Scott Adsit, presumably because he was busy with The Sarah Silverman Program. He still voices Joe in all of his appearances, and returns for Beforel Orel.
Tim Matheson voiced Jonny in the original '60s run. When Hanna-Barbera attempted to revive the series in 1986, Matheson was too old to reprise the role and was thus replaced by Scott Menville. Will Estes would replace him for Jonny's Golden Quest, and would then be replaced by Kevin Smets for Jonny Quest Versus The Cyber Insects. In the first season of The Real Adventures, he was voiced by J.D. Roth. After Hanna-Barbera decided to retool another Jonny Quest remake (The New Jonny Quest) into the show's second season, Roth was replaced by Quinton Flynn.
Hadji was voiced by Danny Bravo in the original series, but the role was given to Rob Paulsen for the '80s revival and telefilms. Michael Benyaer voiced Hadji in the first season of Real Adventures, but was replaced with Paulsen for the later episodes.
John Stephenson voiced Benton Quest for the first five episodes of the '60s series, and was replaced by Don Messick for the remainder of it. Messick would continue to voice Dr. Quest for the '80s series and the films, until The Real Adventures cast George Segal in the role. After the second season began production, Messick attempted to reprise his role but wound up suffering a stroke. As a result, John de Lancie was chosen as the voice for Dr. Quest.
Messick was also the original voice for Bandit, but Frank Welker took over the part for Real Adventures.
Mike Road originally voiced Race Bannon in the '60s run of Jonny Quest, but was replaced by Granville van Dusen for the '80s revival. He was then replaced by Robert Patrick for the first season of The Real Adventures. van Dusen would later reprise Race in the first two episodes of the second season, but the role would then shift again to Robert Foxworth for all the remaining episodes.
Jessie Bannon was first voiced by Anndi McAfee in the telefilms, but her older teenage self would be voiced by Jesse Douglas in the first season of 'Real Adventures', followed by Jennifer Hale after the overhaul in production.
Mona Marshall voiced Penny in the pilot, though Cree Summer would voice the character for the rest of the first season. After production moved from Toronto to Los Angeles, the role was given to Holly Berger for the remainder of the series. Erica Horn later took over the role for the Christmas special, and Tegan Moss has voiced the character in recent incarnations.
Chief Quimby was voiced by John Stephenson in the pilot, by Dan Hennessy in the first season, and then by Maurice LaMarche in the second season.
While Frank Welker voiced Dr. Claw in most episodes, Don Francks (father of Cree Summer) filled in for a few episodes where Welker was unavailable.note Don Francks was initially hired as Welker's full-time replacement for about 25 episodes due to recording moving to Toronto after the pilot. Since Don Adams was recording his Gadget lines in Los Angeles, Frank Welker was brought in to re-record most of Francks' episodes, but there were apparently a few they didn't get to for unknown reasons.Brian Drummond voiced the character in later media.
Gambit was first voiced by Chris Potter, but was voiced by Tony Daniels in the final season.
Iona Morris voiced Storm in the first season and the first few episodes of the second one, but left the show and was replaced with Alison Sealy-Smith.
Colossus was voiced by Rick Bennett in his appearance in "The Unstoppable Juggernaut", while Robert Cait voiced him in "Red Dawn"
Randall Carpenter voiced Mystique in the first two seasons, while Jennifer Dale voiced her for the remainder of the show.
William Franklyn voiced Danger Mouse in the pilot film "The Mystery Of The Lost Chord." Sir David Jason replaced him when it became a series.
The Swan Princess: Most of the cast changed between the first movie ans the second movie, except Michelle Nicastro (who spoke as Odette in the first film, and sang in the sequels) and Steve Vinovich (Puffin). In the latest movie ("The Swan Princess Christmas"), Odette and Puffin got new voice actors.
Rugrats: After Christine Cavanaugh retired from voice acting in 2001, Nancy Cartwright took over her role of Chuckie for the last two seasons of the show and All Grown Up!. Candi Milo also briefly voiced the character in two video games following Cavanaugh's retirement.
After the 1997 death of Grandpa Lou's first voice actor, David Doyle, Joe Alaskey replaced him.
In his first appearance, Jonathan (Charlotte's assistant at work) was voiced by Rene Auberjonois. When he returned to the show, he was replaced by Dan Castellaneta.
Elizabeth Daily also filled in for Cree Summer for a few episodes as Susie when Summer wasn't available.
Tommy was voiced by Tammy Holbrook for the original pilot ("Tommy and the Great White Thing"), but when the pilot was made into a series, Elizabeth Daily was hired as Tommy's regular voice.
The Commissioner in The Inspector (which aired alongside the Pink Panther cartoons) had FOUR different voice-actors during its run. Larry Storch initially did his voice in the first two shorts, then Paul Frees took over for the most of the run. Mark Skor did his voice in one cartoon, and finally, Marvin Miller took over for his final appearances.
Incidentally, Pat Harrington Jr. did Sgt. Deux-Deux's voices for all of his appearances except one: Don Messick did his voice in his final appearance, "La Feet's Defeat". He sounded nothing like the original.
Also, when the Pink Panther and Inspector first aired on NBC, the theatrical cartoons were being aired along with 30-second animated bumpers featuring the characters. The Inspector's and Sgt. Deux-Deux's voices were being done by Marvin Miller for those bumpers.
While normally silent, the Panther himself spoke in two theatrical cartoons, each with a different voice—"Pink Ice" (Rich Little) and "Sink Pink" (Paul Frees). In the 1993 Panther reboot, the Panther spoke continuously with the voice of Matt Frewer.
In the new CGI Star Wars: The Clone Wars series, Jar Jar Binks was voiced in the launch movie and one subsequent episode by his original film performer Ahmed Best, but was inexplicably replaced for all subsequent episodes by one BJ Hughes, apparently a Lucasfilm employee.
Ahmed Best returned for a Season 3 episode, "Supply Lines".
The new Bob & Doug Show, features Dave Coulier replacing Rick Moranis in the role of Bob McKenzie. Since these are animated characters and Dave sorta sounds or tries his best to sound like Moranis, it's not such a big deal—or is it?
The voices for the Peanuts specials change drastically. Almost every other TV special changes at least one actor. This is due to the fact that real children are always used. Many fans are surprised that the franchise hasn't switched to an all female cast that sound like kids. Covering all the recasts wouldn't be practical, but to put things in perspective, both Charlie Brown and Lucy have both had 27 different voice actors since the franchise began. Linus is a bit more lucky, being recast only... 15 times.
This got worse in the Latin American dub, when they not only changed voice actors, but also even dubbing countries.
Dora the Explorer's original voice actress, Kathleen Herles, was replaced in 2006 when she wanted to focus more on her school work. Caitlin Sanchez replaced her, but she herself was replaced with Fatima Ptacek after a NASTY fallout with her parents and Viacom over her salary.
In the original specials, the characters of Dan the Ranger and Melissa Raccoon were always voiced by the musical guests; Dan was voiced by Rupert Holmes in The Christmas Raccoons, Leo Sayer in The Raccoons on Ice, and John Schneider in The Raccoons and the Lost Star, while Melissa was voiced by Rita Coolidge in the first two and Dottie West in the third. In the made-for-video special The Raccoons: Let's Dance!, series creator Kevin Gillis did Dan's few lines (uncredited), while Melissa did not speak. In the first season of the series, Murray Cruchley voiced Ranger Dan, while Linda Feige voiced Melissa. Between seasons 1 and 2, Dan and the other human characters disappeared from the show, and Linda Feige left and was replaced by Susan Roman. When Roman took over the role of Melissa, her interpretation actually changed the character of Melissa, who became spunkier, more youthful and more outspoken (while the character had previously been much more soft-spoken and motherly).
Interestingly enough, in the season 2 clipshow episode "Time Trap!", Susan Roman replaced Linda Feige's dialogue in clips from season 1 (since the episode involves Cyril Sneer traveling back in time and changing history, this was obviously necessary in order to match the new scenes).
Ranger Dan's kids, Julie and Tommy, were originally voiced by Tammy Bourne and Hadley Kay in the specials. In the first season of the series, puberty had set in for both, so they were replaced by Vanessa Lindores and Noam Zylberman (who would go on to voice Bentley Raccoon in later seasons).
The specials were narrated by Rich Little, while Geoffrey Winter took over the narrator duties in the series.
In the specials, Cedric Sneer was originally voiced by Fred Little (yes, he and Rich are related); he was replaced by Marvin Goldhar in the series. This is seen as a good change by most fans, as Fred Little's interpretation of the character was extremely whiny and overflowing with Narm. During the series, Cedric gradually became more self-confident as Goldhar moved away from imitating his predecessor.
Cyril Sneer's pig henchmen were introduced in The Raccoons and the Lost Star, voiced by Nick Nichols, Len Carlson and Fred Little (though Nichols, being the leader, was usually the only one to speak by himself rather in unison). In the series, Len Carlson took over Fred Little, and eventually developed Pigs Two and Three into separate characterizations (where they were originally interchangeable). In 1989, Nick Nichols' poor health and eventual death led to the recasting of Keith Hampshire as Pig One early in the season. Hampshire's voice for the character never really moves beyond an impersonation of the original (though he got a little better by the final episodes).
Bentley Raccoon was originally voiced by Noam Zylberman. Zylberman was going through puberty during the voice recording for Season 5, and so was replaced by Stuart Stone. (You can really tell in Zylberman's last episodes, in which his voice is considerably deeper.) Some fans argue that the actual character deteriorated considerably with the recast; while he had gradually matured throughout the series, suddenly he was an annoying, whiny kid again.
In a musical example of The Other Darrin, Luba was the featured female singer in Season 1, while Lisa Lougheed came in as the featured singer beginning in Season 2 and through the rest of the series. When Luba's songs from season 1 were used in later episodes (and on the "Evergreen Nights" album), they featured Lisa Lougheed's vocals tracked into the original mixes in place of Luba's.
In The Jungle Book spinoff Jungle Cubs, three of the main cast members voices were changed in the third season. In the first two seasons, Bagheera was voiced by Elizabeth Daily; in the third seasons, he was voiced by Dee Bradley Baker, in the first two seasons Hathi was voiced by Rob Paulsen and in the third season by Stephen Feurst, and Louie was voiced by Jason Marsden in Seasons 1 and 2 and by Cree Summer in Season 3. For Bagheera, it was explained that he was going through puberty. There was no explanation for Hathi's and Louie's changes, as Feurst only made him sound goofy, and the change for Louie was especially strange considering Marsden was still voicing Shere Khan.
They also replaced Metallo and, since he had been voiced by Malcolm McDowell, they completely blew their chance at having the hero and villain of Tank Girl voicing characters in the same scene.
Corey Burton, who voiced Metallo above, also replaced Bud Cort as Toyman and Miguel Ferrer as the Weather Wizard. Both Cort and McDowell did return to voice their characters in later appearances, but Ferrer did not.
Kim Possible villain Senor Senior Senior was voiced originally by Ricardo Montalban, who was occasionally unavailable due to health problems. During those times the role was voiced by Earl Boen.
Two examples in King of the Hill: For his first couple of appearances in the first season, John Redcorn was voiced by Victor Aaron when he died in a car accident. Jonathan Joss replaced him for the rest of the series.
His biological son, Joseph Gribble, was voiced by Brittany Murphy from Season 1 to early Season 5, and from mid-Season 5; for the rest of the series he was voiced by Breckin Meyer, this was done because Brittany Murphy was busy making movies, so the writers put Luann in college and had Joseph go through puberty, resulting in a change in voice and appearance.
All the voice actors from the original short, with the exception of John DiMaggio, were replaced when Adventure Time made the leap to full-fledged series. But the most interesting example is that Finn's voice actor (Zack Shada) was replaced by his younger brother Jeremy, because the elder had hit puberty and wasn't able to do his Finn voice. Jeremy has hit puberty too, but rather than be kicked off the show and replaced, the writers wrote in Jeremy's growing up as Finn growing up.
After Totally Spies! moved recordings from Los Angeles to Toronto after 52 episodes:
Alex went from being voiced by Katie Leigh to being voiced by Katie Griffin for the following episodes, and all other media.
Jerry went from Jess Harnell to Adrian Truss at the same time Alex's voice was also replaced.
Jennifer Hale and Andrea Taylor, however, continued their roles of Sam and Clover in separate recordings in Hollywood.
The role of Alfred in Batman: The Animated Series was originally given to Clive Revill, who voiced the character in his first few appearances, but Alfred was later recast with Efrem Zimbalist, Jr. substituting for the rest of the series after Revill went on tour with a play.
Likewise, Paul Winchell voiced Zummi for the first four seasons; after he suffered a non-fatal stroke in 1987, Jim Cummings took over for him for the final two. Likewise, Cummings replaced Winchell as Tigger in the Winnie the Pooh films and shows. While they interchanged between the two actors for a short time, the role was finally handed permanently to Cummings after The Tigger Movie, for which Winchell was intended to record lines until his voice was considered too aged to properly voice the character anymore.
Cavin had a total of 5 different actors for the show's 6-year run; Christian Jacobs (now the lead singer for The Aquabats!) in season 1, Brett Johnson for season 2, David Faustino (yes, thatone) for season 3, Jason Marsden for seasons 4&5 and R.J. Williams (see below) for the final season.
Another Disney Afternoon example: In TaleSpin, Kit Cloudkicker was voiced by two actors — first Alan Roberts, then R.J. Williams. The two-part episode "A Bad Reflection on You" uses both Roberts and Williams; it's difficult to tell them apart, but you can do it if you're familiar with the subtle differences in their voices and you listen carefully.
Earlier episodes of Chip 'n Dale Rescue Rangers had Peter Cullen providing the voice for Monterey Jack, though later episodes had Jim Cummings filling the role (using the same voice he had used for Monterey Jack's father in an earlier episode). Series creator Tad Stones said that the switch was made because they weren't getting enough humor out of the script readings.
Hey Arnold! went through many cast changes due to using real child actors, who have an annoying tendency to go through puberty.
Arnold was voiced by five different actors: J.D. Daniels (the pilot episode), Toran Caudell (Season 1), Phillip Van Dyke (seasons 2 and 3), Spencer Klein (seasons 4 and 5 up to The Movie), and Alex Linz (the post-movie episodes).
Eugene also had four different voice actors: Christopher J. Castile (most of Season 1), Jarrett Lennon (the last few episodes of Season 1), Ben Diskin (seasons 2-4), and Blake Ewing (Season 5).
Sid was voiced by Sam Gifaldi for the vast majority of the show's run, but he was voiced by Sam's younger brother Taylor in "April Fool's Day" as Sam's voice had changed during the long hiatus between The Movie and that episode.
Curly had been voiced at different times by Adam Wylie, Haley Joel Osment, Steven Hartman and Michael Welch.
At various times, Iggy had been voiced by Joseph Ashton, Justin Shenkarow, and Marcus Toji. He is also one of the few child characters on the show to be voiced by an adult woman, as he was voiced by Tress MacNeille in one episode.
Two notable rare examples of the voice actors staying the same are Jamil Walker Smith and Francesca Marie Smith (no relation). Jamil's voice did change during production, but the episode "Gerald's Tonsils" hand-waved the vocal change as Gerald having his tonsils removed and his voice sounding different as a result. For Francesca, even though girls' voices do change during puberty (though the change isn't as extreme as what happens to boys), Francesca still had her Helga voice for the duration of the show.
In the transition from the Madagascar films to The Penguins of Madagascar, some of the characters common to both franchises changed voice actors. Two of the three lemurs traded out their celebrity VAs because it would be too expensive to keep them: Danny Jacobs replaced Sacha Baron Cohen as King Julien, and Kevin Michael Richardson replaced Cedric the Entertainer as Maurice. However, Andy Richter retained his role as Mort.
Kowalski and Private are an interesting inversion of how this trope is normally handled: originally voiced by DreamWorks Animation staff (animator Chris Miller and editor Chris Knights, respectively), they "upgraded" to professional voice actors Jeff Bennett and James Patrick Stuart on the series. (Series creator Tom McGrath stayed as Skipper, and John DiMaggio stayed as Rico.)
Winx Club: While the current Nick version has had a consistent cast, both the earlier 4Kids and Cinelume English versions had recasts:
In the 4Kids version, Caren Manuel voiced Stella for the first season, but she was replaced with Christina Rodriguez for the last two seasons of the 4Kids run, though Manuel did continue her role of Darcy. In addition, Dani Schaffel quit her role as Tecna after the second season, and the character was voiced by Rebecca Soler for the third and final season of 4Kids version.
In the Cinelume English version created for international markets, Bloom was notably voiced by Helena Evangeliou for the first 3 seasons of the show before taking leave and was replaced with Angela Galuppo for the fourth season. Lezlie Karls voiced Tecna for all of the first season, as well as a few episodes of the second before she left, the role subsequently went to Jodie Resther for the rest of Season 2, as well as all of seasons 3 and 4. Sarah McCullough voiced Musa until a few episodes into the third season before the character was recast with Anik Matern. The entire cast was different for the movies, which were dubbed using actors commonly found in anime (Cindy Robinson, Christopher Corey Smith, Stephanie Sheh, Erin Fitzgerald, etc).
On The Lion KingRecycled: The SeriesTimon & Pumbaa, Timon had no fewer than four voice actors over the course of the series, according to IMDb, including original actor Nathan Lane in nine of the episodes. Exactly when the transitions took place is undocumented, except for Quinton Flynn, who is mentioned as only being in the first season. IMDb also states that nearly every character who carried over from the movies was re-cast except for Ed the hyena and Rafiki.
In Bobby's World, Bobby's older brother, Derek, was voiced by Kevin Smets in the first five seasons; for the remainder of the series, he was voiced by Pamela Adlon because Smets had gone through puberty.
Code Lyoko had two abrupt voice-actor switches early in the series. Jodi Forrest replaced Christine Flowers as Sissi after only four or five episodes, while Matt Gézcy replaced Odd's voice actor after only two or three. One of the more unusual things about this switch is that it is made obvious that the episodes were dubbed out of order — Forrest and Gézcy's voices are present in the third episode, but are back to the old actors in the fourth.
Averted with Jeremie, whose frequent voice changes made people think he had been replaced multiple times - but nope, it's Sharon Mann the whole time.
Usually when a voice actor dies, he needs a replacement. The Brazilian dubbing for Kung Fu Panda however managed a near-miracle: the guy who usually voiced Dustin Hoffman, Newton da Matta, died two years prior to that movie, in 2006. But the actor they got to dub over Hoffman's Shifu is a dead-on soundalike (Newton - not-Newton).
Muppet Babies had a few cases of the trope. After Howie Mandel left the show in 1985, his roles of Baby Animal and Bunsen were given to Dave Coulier, while Frank Welker took on voicing Baby Skeeter. Meanwhile, Camilla the Chicken was initially voiced by Frank Welker, but was later voiced by Dave Coulier and then by Russi Taylor.