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3* ''WesternAnimation/AdventureTime'':
4** [[CharacterAgedWithTheActor Finn's voice becomes deeper as he grows older and his actor ages.]] As such, they justified this in-universe by having Finn turn 13 in the middle of Season 2. Comparing the voice of early season Finn to that of the late season is like comparing night and day.
5** Cinnamon Bun's first speaking appearance ("The Enchiridion!") gave him a noticeably high and nasal voice, but that was ditched in favor of a gruff SimpletonVoice.
6** As Lemongrab 2 starts to undergo DuplicateDivergence, he becomes softer-spoken compared to his shrieky LargeHam brother.
7** NEPTR's voice was softer in "What Is Life?". When he returned in "Hot To The Touch", his voice became more energetic and boyish.
8** Peppermint Butler sounded like an old man in "Slumber Party Panic". His voice also wasn't pitched up like it normally is.
9** In "Thanks for the Crabapples, Giuseppe", Abracadaniel's soft voice suddenly becomes very low and cracky.
10** Jake is also notable. In early episodes, he sounded a lot more like [[WesternAnimation/{{Futurama}} Bender]] (only not as [[{{Jerkass}} much of a drunken jerk]]). In later episodes, Jake ''still'' sounds like Bender, only a bit more wackier and more nuanced, if not slightly lower and less raspy.
11** Ice King's voice has gotten a bit less raspy and a bit more high-pitched over the years, possibly to reflect him being less of a jerk and more of a pitiful person.
12** After Too Young, and in some parts of You Made Me and beyond, Lemongrab starts to sound a tiny bit effeminate, and sometimes has a very slight British accent for some reason. He sounds a little more eloquent in his later episodes.
13* In the two ''[[WesternAnimation/AdventuresInMusicDuology Adventures in Music]]'' cartoons from 1953, Professor Owl is voiced by Bill Thompson with a voice that's soft (except when he has to deliver a BigShutUp) and has a slight owl-like "hoot" in its tone. Decades later, in the ''WesternAnimation/DisneySingAlongSongs'' series that reuses footage of Professor Owl for its framing segments, the character is voiced by Creator/CoreyBurton, who in the earlier videos of the series gives him a higher, more nasal voice than Thompson gave him (more like the voices Thompson used for [[WesternAnimation/AliceInWonderland the White Rabbit]] or [[WesternAnimation/PeterPan Mr. Smee]]). By the later videos, however, Burton replaces that voice with a much closer impression of Thompson's 1953 version.
14* ''WesternAnimation/TheAmazingWorldOfGumball'':
15** Gumball and Darwin's voice actors progressively get older during the show's production, leading to their voices becoming deeper. This is even lampshaded in [[Recap/TheAmazingWorldOfGumballS3E1TheKids two]] [[Recap/TheAmazingWorldOfGumballS5E11TheCopycats episodes]] which end on Gumball and Darwin suddenly getting new voices as their old ones officially hit puberty.
16** Anais' voice becomes much deeper from season 3 onward, likely to accentuate her BrainyBaby status in the family.
17** An in-universe example happens with Rob in "The Nemesis". Gumball uses a remote to give Rob a deep, menacing, British accent courtesy of Creator/DavidWarner. He keeps this up until "The Disaster", where Rob uses the universal remote to change it back to normal.
18** Ms. Simian used to have a British accent in the first season, which is gone in all future episodes. Her voice has also gotten softer and less screechy.
19* Most of the main cast on ''WesternAnimation/{{Animaniacs}}'':
20** Wakko (Creator/JessHarnell) more closely resembled Music/RingoStarr earlier on before going higher-pitched.
21** Yakko (Creator/RobPaulsen) originally had more of a "tough guy" tone to him.
22** Dot (Creator/TressMacNeille) started to lose her cute squeak and started to sound more like Tress's natural voice toward the end of the run.
23** Also, in the earliest ''WesternAnimation/PinkyAndTheBrain'' shorts, Pinky's voice (also Rob Paulsen) was a little deeper and had more of a speech impediment. The Brain (Creator/MauriceLaMarche) sounded more like Creator/OrsonWelles initially before becoming a combination of Welles and Creator/VincentPrice.
24** Skippy Squirrel's voice deepened over time, due to his voice actor (Nathan Ruegger, the then-preteen son of writer/producer/director Tom Ruegger) hitting puberty in the later seasons. A couple episodes near the end of the run have him pitch-shifted.
25** The twenty-two years that have passed between the original series and the [[WesternAnimation/Animaniacs2020 2020 revival]] definitely show this off, especially with Paulsen's performance as Yakko. Paulsen underwent treatment for stage 3 throat cancer in 2016, and coupled with his age, it left the voice much deeper and a little raspy. It should be noted though that the Warners' voices were pitched up in the original series.
26** As for Dot, her voice is noticeably deeper than her original incarnation, because Creator/TressMacNeille's voice has gotten deeper in the two decades between the original series and the reboot. This is even lampshaded in the theme song, changing her description from "Dot is cute" to "Dot has wit".
27* ''WesternAnimation/AquaTeenHungerForce'':
28** Master Shake originally spoke had a slightly more nasally, teenage-esque infliction in the first season, while maintaining his energy throughout the series.
29** Frylock's voice was much deeper for the first season, being much calmer overall before his annoyance for his roommates were expanded upon.
30** Meatwad spoke with a more childlike and energetic approach before becoming calmer. His voice also became lower after a season or two, compared to his squeakier original voice.
31** Carl's New York accent was much stronger in the early episodes of the show.
32* ''WesternAnimation/BatmanTheAnimatedSeries'': In "[[Recap/TheNewBatmanAdventuresE21MadLove Mad Love]]", when [[Characters/DCAUHarleyQuinn Dr. Harleen Quinzel]] first meets the Joker, she speaks in Arleen Sorkin's natural voice. Over the time she spends with him, though, her voice slowly gets higher in pitch. By the time she fully transforms into Harley Quinn, her voice is as high as it'll comfortably get and her New Jersey accent is more emphasized than ever.
33* ''WesternAnimation/BigCityGreens'':
34** Tilly's voice has gotten deeper and less childlike post-2019, as she progresses into CoolBigSis territory.
35** Cricket's voice sounds slightly higher-pitched as of "Blood Moon".
36** Remy's voice has also gotten higher and less whiney.
37** Gramma Alice sounds less aged and more aggressive in the newer episodes than she did when the show began.
38** Gloria's voice was more higher-pitched and raspy in her first appearance, compared to her deeper and more smooth-sounding voice later on.
39* ''WesternAnimation/BlazeAndTheMonsterMachines'':
40** All of AJ's voice actors got progressively deeper in pitch throughout the course of each season.
41** Angelina Wahler's voice for Gabby became much more squeaky and helium-pitched in later episodes.
42** Pickle's voice is much deeper in the early episodes compared to how he sounds now.
43* ''WesternAnimation/BlinkyBill'': Marcia Marsupial Mouse had her voice pitch-shifted in the 1992 movie, but that was removed when the series came along. However, as the shows progressed, her voice started to get higher and raspier.
44** Flap's voice was raspy, too, but earlier on.
45** Splodge's voice progressed into lower registers, but it was still consistent since the franchise started.
46** From series 2 onward, Keith Scott began voicing Nutsy's father in a deeper rougher voice than in the penultimate episode of series 1.
47* ''WesternAnimation/ButterbeansCafe'': Koda Gursoy's voice for Jasper gotten slightly deeper late into Season 1 due to experiencing puberty during production.
48* ''WesternAnimation/CampLazlo'':
49** Scoutmaster Lumpus' voice was less nasal and lower-pitched in earlier seasons.
50** Slinkman's voice gradually became more emotive over the course of the series.
51* ''WesternAnimation/CraigOfTheCreek'': Philip Solomon was 14 when he began voicing nine-year-old Craig Williams. Fast-forward a few years, and Solomon is an adult, while Craig has only aged a year. Consequently, Craig's voice sounds deeper and much more affected.
52* ''WesternAnimation/TheCupheadShow'' has Cuphead and Mugman's voices considerably deep for children (especially Mugman's); fitting more with the "Kidult" description. Starting from "Handle With Care" their voices noticably start to get more higher pitched and nasally.
53** Likewise, The Devil had less of a British accent and a more [[WesternAnimation/HowTheGrinchStoleChristmas Boris Karloff-sounding]] soft and menacing voice. Starting from "Roll The Dice" he is more prone to yelling and his accent is more noticeable. His voice also considerably has more range of emotions.
54* Compare Creator/TonyAnselmo's performance as WesternAnimation/DonaldDuck in the first episode of ''WesternAnimation/DuckTales1987'' to his performance in ''VideoGame/KingdomHeartsII'' (2006). It was rather rough around the edges when he originally took over from Clarence Nash, but has improved considerably in the past 30+ years. And in ''WesternAnimation/DuckTales2017'' he is much more comprehensible and can pull of an impressive range of emotions with it.
55* As Clarence Nash aged his voice for WesternAnimation/DonaldDuck became rougher and raspier, compare the classic shorts to ''WesternAnimation/MickeysChristmasCarol''.
56* ''WesternAnimation/FamilyGuy'' has had conspicuous vocal changes for several characters;
57** This is especially noticable with Lois' voice actor Creator/AlexBorstein. In the pre-revival seasons, Lois' voice, though still nasal, was lower-pitched and sounded more realistic. Post-revival, her voice got higher-pitched and sounded more cartoon-y to the point where Borstein could give even the best Creator/FranDrescher impersonator a run for their money. This was [[LampshadeHanging lampshaded]] in the episode "[[Recap/FamilyGuyS4E6Petarded Petarded]]" when Lois, speaking at a microphone, says, "Sorry folks... Oh my God, [[DoIReallySoundLikeThat is that what my voice sounds like?]] It's all whiny and nasally... egh."
58** In an early episode, actors are hired to replace the Griffins on a reality show... and Lois is played by ''Creator/FranDrescher''.
59-->'''Lois:''' [[IResembleThatRemark I do not sound like that!]]
60** Her Hungarian voice actress does actually voice both her ''and'' Drescher, giving the joke an all new layer. And yes, even her voice has risen over the seasons. As did Peter's, for that matter.
61** Stewie sounds significantly less like a Creator/RexHarrison impression than he did originally, mainly he's less over the top and lost his Rex Harrison-like voice ''completely'' by the sixth season and now talks like a cross between a faux-Brit and CampGay guy instead. Interestingly, the opening sequence briefly rerecorded Stewie's lines to match the Vocal Evolution during Season Three (and to fix a misunderstanding with the line "Laugh and Cry!"[[note]]which was mistaken as "Effin' Cry". This is {{lampshade|Hanging}}d in a few episodes.[[/note]]), though reverted back shortly after the [[UnCancelled Uncancellation]], making the difference all the more noticeable.
62** Hungarian Stewie started out sounding nothing like the original. His actor focused too much on the evil part, turning his sentences into barely intelligible mumbles and growls, and ''every'' line sounded the same. After a while, he began using his normal, speaking voice... well, he should have done that from the start, because now he's a fan favorite.
63** Peter's voice was also thicker before Season 3 had aired.
64** Brian spoke with a smooth, suave tone in the pre-revival seasons. In the post-revival seasons, he speaks with what is more or less Seth [=MacFarlane=]'s natural speaking voice.
65** Everyone speaks much more quickly, especially Brian and Lois. Pitch has generally slid upward, as well.
66** Chris' voice was originally a [[Film/SilenceOfTheLambs Buffalo Bill]] impression, but as time has gone on, it has gotten much higher in pitch.
67** Herbert the elderly pedophile originally spoke in a slow, soft, effeminate voice with a whistle and a lisp, after about his fourth appearance he talks faster and more flamboyantly, and the whistle and lisp have vanished.
68* When the CGI era of ''WesternAnimation/FiremanSam'' began in 2008, Steven Kynman portrayed Elvis with a soft, middle-range voice. As the series progressed, his voice became deeper, dopier, and a bit raspier; he also began to laugh more often.
69* Pinto Colvig, who voiced WesternAnimation/{{Goofy}} until his death had his voice subtly changed to become less, well, goofy sounding as the time went. By the time he last played the character in "Goofy's Freeway Troubles" and "Donald Duck Goes West", his Goofy voice has a lower and more worn sounding voice than he did in the 30's and 40's cartoons.
70* ''WesternAnimation/TheSimpsons'' has several examples of this:
71** Creator/DanCastellaneta's original performances of Homer Simpson sound almost nothing like the current character -- in fact, the difference is so pronounced that it's hard to believe it's the same voice actor. But this is decidedly a case of ''evolution'' rather than decay, as Castellaneta found the original voice (based on Creator/WalterMatthau's) difficult to sustain or put force behind, so he changed the tenor deliberately.
72** Homer is also an in-universe example, as a flashback of Grandpa Simpson's reveals that young Homer had an [[BeautifulSingingVoice incredible singing voice]] as a choirboy, right up until he hit puberty in mid-solo.
73** Creator/JulieKavner distanced Marge's voice from her natural tone as seasons progressed, gradually making her higher and wackier-pitched. She's also gotten noticeably raspier in the most recent seasons, largely due to Kavner aging.
74** Nelson's voice has changed considerably over the years. It used to be higher pitched before becoming low and gruff sounding.
75** Police Chief Clancy Wiggum originally had a much deeper, more gruff sounding voice, closely mimicking that of Creator/EdwardGRobinson. Creator/HankAzaria gradually found him slipping into a more high-pitched, whiny sounding voice. The opposite happened with Azaria's other character Moe Szyslak. Moe started out high-pitched and nasal, then switched to deep and gruff.
76** Creator/HarryShearer gave Mr. Burns a pretty [[EvilSoundsDeep gruff and menacing voice]] in the first season, which combined with his humorless demeanor, made him into something of a KnightOfCerebus. He softened it up over the years, and Burns in turn, while still corrupt and evil, became a lot [[LaughablyEvil goofier]] as well.
77** Creator/YeardleySmith's Lisa voice is noticably a lot less high-pitched than it was in the earlier seasons.
78** In Ralph's first voiced appearance in "[[Recap/TheSimpsonsS3E8LisasPony Lisa's Pony]]", he speaks in Nelson's voice. However, this could be a mistake, as both Ralph and Nelson are both voiced by Creator/NancyCartwright. In "[[Recap/TheSimpsonsS3E22TheOttoShow The Otto Show]]" and "[[Recap/TheSimpsonsS4E1KampKrusty Kamp Krusty]]", Ralph speaks in a lower-pitched voice than usual, and "I Love Lisa" was the first episode to use Ralph's normal voice, which stuck throughout the series.
79* ''WesternAnimation/ShimmerAndShine'': Leah's voice became deeper and more adolescent as the series progressed, because her voice actress, Alina Foley, aged during production (she was 12 when the series premiered, and is currently 16). Notice in the first season she sounds like a little girl who's between 6-8 years old; in the later seasons, especially the third, she now sounds at least thirteen.
80* ''WesternAnimation/SpongeBobSquarePants'':
81** While Creator/TomKenny has always been the voice of [=SpongeBob=], starting in the movie, Kenny has made him ridiculously more high-pitched and effeminate, adding to that ever-present "[=SpongeBob=] is gay" notion. Then in the later seasons such as after the transition to HD, [=SpongeBob=]'s voice has gotten slightly deeper in pitch (though it's still far higher than it was in the pre-movie days).
82** Post ''Sponge out of Water'' and ''Sponge on the Run'', [=SpongeBob's=] voice sounds much deeper and slightly nasal, likely due to Tom Kenny aging after 20 years.
83** Patrick and Squidward's voices have also changed over the years, though not as noticeably as [=SpongeBob=]'s. Patrick's voice is higher and more oafish sounding and Squidward's voice is more resonant and less nasal.
84** Mr. Krabs voice gets more forcefully higher and gruffer as the show goes on.
85** Patrick's original German voice actor Marco Kroeger started out very breathy, but eventually settled.
86** Plankton's voice changed from a gruff, low voice to a higher pitched one, akin to his IneffectualSympatheticVillain persona.
87** Karen's voice is deeper and more monotonous now than in her early appearances.
88** Pearl's voice has gotten raspier over the series.
89** The French Narrator's voice has gotten much deeper since the transition to HD.
90* ''WesternAnimation/AvatarTheLastAirbender'':
91** Aang has a voice actor who started off around the same age as him (twelve), and the recordings were mostly done in a linear order. This meant that as the episodes continued, his voice deepened and broke naturally with Creator/ZachTylerEisen's. Listening to anything from the first season to anything from the third season -- especially "Day of Black Sun" onward -- will really throw this into light. Because of the production lull, by the end of the series they actually had to start pitching Zack's voice up a little.
92*** The same happened to his German voice actor. Started off as a child, and it ends with him entering puberty.
93** Zuko has a distinct lisp during the first season, which made him an odd mixture of sinister and somewhat childish. The lisp goes away with time, and by the third season Zuko had developed a more confident, almost parental voice. (Particularly effective when giving rousing speeches.) Of course, this was probably a deliberate creative decision than just evolution, as his voice actor was already an adult when he started. He's also a rare exception of a high-school age character in a western cartoon who gets ''less'' whiny-sounding over time.
94* ''WesternAnimation/KimPossible'':
95** Many a cartoon that takes place in a HighSchool setting feature boys whose voices become whinier as time goes on... when it should be the exact opposite. Ron Stoppable is a prime example of this.
96** Come Season 4, Kim herself has become quite nasal and her pacing at times feels intensely rushed.
97** Drakken is a similar example, and there's a major difference in his voice later in, mostly getting higher.
98* As are Danny, Tucker and Dash in ''WesternAnimation/DannyPhantom''. Danny is the least apparent simply because his 42-year-old voice actor David Kaufman barely sounded like a 14-year-old boy to begin with. Granted, Butch Hartman did hold auditions for actual 14-year-olds, but didn't find any to sound "heroic" enough. Alas, RealityIsUnrealistic.
99** Vlad has this, too. Watching his first appearance in ''Bitter Reunions'' is always a bit strange. His voice is more nasal, and has an American accent. Later on, Mull hits his stride with Vlad's voice, no more nasality and he even adds in a slight British accent.
100* ''WesternAnimation/{{Futurama}}'' has a few examples of this;
101** Over time, Creator/BillyWest's voice for Fry became closer to his natural voice. He once said that he initially modeled Fry's voice after his own when he was around twenty-five. [[FridgeBrilliance As Billy got closer in age to Fry in-universe, his voice naturally became more accurate.]]
102** Professor Farnsworth's voice has gotten deeper and less nasal from the early episodes. It was initially intended to be very similar to Fry's voice, as a nod to the two being distant relatives, but was quickly changed after the producers realized that viewers with impaired eyesight wouldn't be able to tell whether Fry or the Professor was meant to be speaking.
103** Leela's voice has gotten slightly higher pitched since "[[Recap/FuturamaM2TheBeastWithABillionBacks The Beast with a Billion Backs]]". In the earlier episodes, Leela sounded more like a pitched-down version of Peg Bundy (which is actually Creator/KateySagal's voice in real life and how Peg sounded on the first season of ''Series/MarriedWithChildren'' [[EarlyInstallmentWeirdness back when Peg actually cooked and did housework, even though she was bad at both]]).
104** While Creator/JohnDiMaggio's Bender voice remained pretty consistent throughout the series during its original run, in the feature length films (made four years after the end of the series), Bender's voice is somewhat less raspy; it's probably closer to the voice he used to play Elzar (or Bender from the very early episodes of series one - it sounds a bit gruffer in series two).
105** After the first season, Hermes' voice became much higher and less nasally, while still retaining the Jamaican accent.
106* ''WesternAnimation/FostersHomeForImaginaryFriends'' both have Mac and Bloo's voices change during the course of the show:
107** About halfway through the first season, Bloo's voice gets more high-pitched and whiny, probably to better reflect the [[{{Flanderization}} changes in personality]] he went through at that time. He has been getting progressively screechier ever since.
108** On the other hand, Mac's voice became a bit deeper towards the end of the first season and goes even lower during Season 3 due to his voice actor going through puberty. [[WiseBeyondTheirYears Works good enough.]]
109* ''Franchise/DCAnimatedUniverse'':
110** Creator/KevinConroy's voice for Franchise/{{Batman}} was much different in his later years than it was when he first started. In spite of Conroy being famous for creating a stern, effective and iconic Batman voice without resorting to guttural growling, his initial Batman voice was deeper and had a bit of a growl to it. Starting around the time of ''WesternAnimation/TheNewBatmanAdventures'', his voice became higher and lost most of the growl, with Conroy later confirming that he changed the voice due to the strain it put on his vocal chords. Unfortunately, he also stopped bothering to differentiate between Batman and Bruce Wayne's voice. (On the commentary track for ''WesternAnimation/BatmanGothamKnight'', Conroy stated that he was requested to do so at the producers' behest.) Bruce originally had a lighter and more playful tone than Batman's dark and foreboding tone. Conroy made the differentiation for at least one episode of ''WesternAnimation/JusticeLeague'' ("Maid of Honor") where Bruce Wayne had to make a public appearance. Other than that, Conroy's stance was that Bruce Wayne is the act, and his performance reflects that.
111** Also, Creator/MarkHamill's version of The Joker? If you watch ''WesternAnimation/BatmanTheAnimatedSeries'' (higher pitched and wasn't very consistent, changing pitch and accent occasionally) then ''WesternAnimation/BatmanBeyondReturnOfTheJoker'' (much smoother and more sinister) and then play ''VideoGame/BatmanArkhamAsylum'' (gravelly and older sounding) it is completely different especially with the laugh.
112** Creator/LorenLester spoke with a lower voice when portraying Dick Grayson as ComicBook/{{Nightwing}}.
113** Initially, Henry Silva spoke in an over-the-top pseudo-South American accent as Bane and gave him a screechy, loud voice that made him into a LargeHam. In ''The New Batman Adventures'', he dropped the accent and spoke in a lower, more sinister pitch.
114* ''WesternAnimation/SouthPark'': Keeping in mind that the vast majority of the voices are Creator/TreyParkerAndMattStone, with the pitch increased in Pro Tools for the four main characters, the individual voices have still shown considerable evolution:
115** Cartman's voice has gotten lower and less raspy over the years. He was often nearly incomprehensible in the early seasons, but now his dialogue is quite clear.
116** Stan and Kyle's voices have also become lower in pitch since the first couple of seasons. Stan kind of sounded like [[Anime/DragonBallZ Gohan]] as a kid until about Season 3.
117** After taking over for Creator/MaryKayBergman following her death, Eliza Schneider gradually evolved her initially near identical take on Wendy, similarly making her deeper and less shrill sounding. By the time Schneider left and was herself replaced by April Stewart, the child-like tone in Wendy's voice was completely gone. April Stewart would later state that Parker and Stone encouraged her to make Wendy sound more "mature", and that they decided to use less pitch-shifting for the character. A notable difference between Bergman and the later actresses is that while Bergman was able to naturally produce the high-pitched childish voice, Schneider and Stewart had to have their voices digitally tweaked.
118** Butters lacked his Southern accent in his early appearances. While he retains the accent in recent seasons, his voice has become noticeably deeper, most likely due to his voice actor Matt Stone aging. It was also more monotone in his earlier appearances, which became less prominent by Season 6.
119** Clyde originally started out with a higher voice, almost like Butters' (although still voiced by Trey Parker). His voice would gradually deepen as he became used more.
120** Craig's voice became higher at one point in the series but has gotten significantly deeper and nasaler after Season 12, most notably "Pandemic".
121** Randy's voice was lower and calmer in earlier seasons, but it has gotten higher and more oafish sounding as the series progressed.
122** Heidi's voice became slightly higher in pitch and became more sweet-sounding.
123** The cast as a whole has also gained a much more impressive vocal range than before, better for conveying neuroses or hammy moments from the characters, compared to the earliest episodes, which had a much stiffer, almost ''Peanuts''-esque lack of enthusiasm.
124* The voices in ''WesternAnimation/EdEddNEddy'' have changed over the years:
125** Lee's voice was noticeably less nasally masculine earlier on.
126** Edd's voice used to sound quiet, less emotional, and raspy, Jimmy's voice was slightly incoherent throughout Season 1 and early Season 2, and Rolf's voice used to have a thicker accent.
127*** It is notable that Jimmy was voiced by an actual young boy whom surprisingly was not replaced after he had gone through puberty, the change in his voice in most noticeable in the holiday specials.
128** Ed's voice is noticeably higher and more raspy in the earlier seasons, and is more restrained compared to the later NoIndoorVoice. His earlier voice was more like a frat boy and his later voice was a SimpletonVoice similar to ''WesternAnimation/LooneyTunes''' depictions of [[Literature/OfMiceAndMen Lennie Smalls]].
129** The most interesting case was Nazz, who had 3 different voice actresses throughout the course of the series. It's similar to the Wendy example above, except that Nazz's original voice actress is still alive.
130* ''WesternAnimation/TheVentureBros'':
131** At the beginning, the Monarch used to sound a lot more subdued compared to the loud shrill he has now. Not really a bad thing as the shrill is a lot funnier.
132** Dr. Girlfriend's voice was made slightly more feminine after the first season, making it a little more believable as a woman's voice.
133** In Jonas Jr.'s first appearance, he sounded like a raspier version of Rusty. In his later appearances, he sounded much more like his father, Jonas Sr.
134* ''WesternAnimation/TheLionGuard'': Both Kion and Bunga's voices got progressively deeper by the end of Season 2, and by Season 3, their appearances have aged up to match.
135* ''WesternAnimation/LooneyTunes'':
136** Some of Creator/MelBlanc's voices had very different tones before settling in their more familiar ones;
137*** A few evolved into being softer and more like his normal speaking voice as the years wore on, though the fact that at least three of them (Daffy, Tweety, and Speedy) were originally pitch-shifted probably didn't help. In ''Daffy's Quackbusters'' it's very noticeable, especially if they played a clip from an episode then switched back to the main story his Daffy and Porky Pig noticeably sounded older and less high-pitched. This was perhaps most noticeable with Yosemite Sam, who by the 1970s, basically sounded like Mr. Spacely from ''WesternAnimation/TheJetsons'', who Mel Blanc also voiced.
138*** One of the most striking cases is the early short "Elmer's Pet Rabbit," which was recorded earlier but released after Bugs' official first appearance. Bugs Bunny doesn't have a hint of his trademark Brooklyn voice and instead speaks in a very loud, baritone voice. Were it not for the fact that Blanc was known for several different voices, you'd almost think they'd originally cast a completely different actor.
139*** Blanc's voice for Marvin the Martian started out sounding like a bad Droopy Dog impression before evolving into the deep squeaky voice he's known for.
140** Creator/JeffBergman's voice for WesternAnimation/BugsBunny has noticeably changed since the 90's to the point that it sounds almost nothing like Mel Blanc's Bugs. His voice for Daffy also changed in latter years, with a much less noticeable lisp.
141* ''WesternAnimation/TheLoudHouse'':
142** Lincoln's voice actors have all experienced puberty near the end of the respective periods of when they voiced him.
143** Lana and Lola's voices have gotten slightly deeper from the fifth season onward.
144** Rusty Spokes' voice has gotten much deeper as his actor aged.
145* Nearly everyone in the cast of ''WesternAnimation/{{Daria}}'' did this to some extent over the years:
146** The most noticeable is Jane Lane's Wendy Hoopes who originally gave the character a sly, high pitched tone which would eventually evolve into a deep, round tone by Season 5.
147** Jake, Kevin and Brittany were also much lower pitched earlier on, and Mr. [=DeMartino=] was a lot [[HairTriggerTemper quieter]]. And of special notice is that Daria's voice became ''more'' monotone as the series went on. Overall, it's pretty fair to say that almost everyone's voice is unrecognizable as their later incarnations in the first season or so.
148* [[Creator/JimCummings1952 Jim Cummings]]' performance as WesternAnimation/DarkwingDuck is noticeably lower-pitched and less hyper in earlier episodes.
149* ''Franchise/WinnieThePooh'':
150** Tigger:
151*** Jim Cummings' voice has gotten more breathy, almost like an old man, from ''WesternAnimation/TheTiggerMovie'' onward.
152*** His original actor Creator/PaulWinchell also evolved throughout his three decade run, his lisp worsening, his baritone fading and becoming much more high pitched and raspy as he aged. This was the alleged reason Disney retired Winchell from the role completely by ''The Tigger Movie'', believing Winchell's voice had worn so much he sounded less like his original Tigger than his stand-in Cummings did.
153** Creator/PeterCullen's interpretation of Eeyore evolved into a near perfect replica of Ralph Wrights' rendition (originally being somewhat breathier and higher pitched).
154** John Fiedler's Piglet voice became raspy and breathy as he aged.
155** Ken Sansom's Rabbit voice was noticeably gruffer in the early episodes of ''New Adventures'', before getting a bit higher and effeminate sounding.
156* George Lowe began voicing [[WesternAnimation/SpaceGhostCoastToCoast Space Ghost]] very straight, much like the superhero Space Ghost was supposed to be. As time went on and the show became more surreal and anarchic, he gradually loosened up until he was essentially voicing Space Ghost with his natural speaking voice, although he would drift back towards the archetypal hero-voice if the script called for it. Zorak changed too, keeping the gravelly insectoid rasp but losing the stiff robotic inflection.
157* ''Franchise/SonicTheHedgehog'':
158** ''WesternAnimation/AdventuresOfSonicTheHedgehog'' has examples featuring both Scratch and Grounder;
159*** If you watch some of the earliest episodes, you'll notice that they talk quite differently from their later performances-- Scratch is voiced with a New York-influenced accent, whereas Grounder has a [[SimpletonVoice lower, stupider voice]]. These attributes disappeared over the course of the series. (Grounder still sounded dumb, but less so.)
160*** An odd case in the German dub: Gerald Paradies and Oliver Feld had already adopted voices for the henchbots right from the get-go, but during the flashback in the first episode, Feld's voice for Scratch was really his own (up to the line "Mein zwillingsbruder? Bin ich so haesslisch?!"); then when he first interacts with Grounder, Feld switches back to the previous voice. Also, Paradies' Grounder also got slightly higher over the episodes.
161** In the pilot episode of ''WesternAnimation/SonicTheHedgehogSatAM'' Princess Sally's voice sounded more younger and shrill. For the rest of the series, Creator/KathSoucie used her natural speaking voice, albeit with occasional slight fluctuations between lower and higher pitched.
162** Roger Craig Smith's performance as Sonic in ''WesternAnimation/SonicBoom'' is a noticeably lower and more natural pitch than his voice for the games incarnation.
163* ''WesternAnimation/TinyToonAdventures'':
164** Danny Cooksey's voice for Montana Max was noticeably higher in earlier episodes. Not surprisingly, he was the most prominent child voice actor on the staff.
165** Also, Creator/CharlieAdler's voice for Buster is a tiny bit higher in some of the earlier episodes. This is especially noticeable in "Cinemaniacs", one of the first episodes to be recorded; he sounds pitch-shifted.
166* ''WesternAnimation/PhineasAndFerb'':
167** Phineas got a little lower after the pilot. Compare how he sounds in the title sequence to how he sounds on the show proper. Once again, this is the result of the voice actor aging, as Vincent Martella was 14 when he first started voicing Phineas. If you're comparing later eps to early eps, the age is the main reason. If you're comparing the present voice to the title sequence, though, remember that Phineas lightened up after the first few eps. The way he sounds in the title sequence is more in line with that earlier characterization.
168** In addition, Ferb's voice has gotten lower, Isabella's and Baljeet's became higher pitched, and Buford's is less gruff than it was in the early episodes.
169** Some of the Fireside Girls, Milly and Katie in particular, have had their voices become slightly lower-pitched in the final season.
170* ''WesternAnimation/ThePowerpuffGirls1998'': The narrator's voice sounds noticeably deeper since the show switched from cell animation to digital ink following TheMovie.
171* ''WesternAnimation/{{Chowder}}'':
172** In another case of child voice actor equaling changed voice, Nicky Jones started voicing the title character when he was 11. Come the third season, he sounds noticeably older.
173** Panini, too, for that matter. In fact, her voice actress started voicing the character at age 13.
174** Mung Daal, in the {{Pilot}}, had a high pitched, cracking voice, much like a stereotypical elderly man. As the series goes on, his voice deepens and has traces of some kind of accent. Truffles' voice also gets progressively lower and grumpier, which is ironic since her high-pitched shrieking is [[{{Flanderization}} flanderized]] [[LampshadeHanging in-show]] at one point.
175* ''WesternAnimation/TheFairlyOddParents'':
176** Cosmo's voice was always provided by Creator/DaranNorris; though his voice went from deep and intelligent sounding to extremely high-pitched and whiny. It may sound like Norris [[TheOtherDarrin was replaced]], but he wasn't. This might have been done to differentiate his voice from Timmy's dad's voice.
177*** In Brazil, voice actor Guilherme Briggs gave Cosmo both his deep and high-pitched voices, switching between them depending on which is better for the scene, still using more the high-pitched voice.
178** Wanda sounded a lot younger in the "Oh Yeah Cartoons".
179** Timmy's voice was a little lower in Season 1 than in the rest of the show.
180** Jorgen's voice was more of a threatening monotone in his first few appearances, but eventually got more higher, expressive and gruffer.
181* ''WesternAnimation/TheOwlHouse'': Gus Porter's voice actor, Creator/IssacRyanBrown, had been going through puberty during the production of episodes "Agony of a Witch" and "Young Blood, Old Souls". To counter this hitch, his voice was edited into sounding younger. The change in his voice is even [[Main/LampshadeHanging lampshaded]] in "Escaping Expulsion":
182-->'''Gus:''' ''[Voice is noticably deeper]'' Luz! You're okay!\
183'''Luz:''' ''[Notices Gus is taller]'' Whoa, Gus! Did I uh, miss a birthday or something?\
184'''Gus:''' ''[Shrugs]'' Witch puberty.
185* Ralphie and Carlos on ''WesternAnimation/TheMagicSchoolBus'' have much deeper voices by the third season since their voice actors were going through puberty during the run.
186* Time has been very good to Creator/PeterCullen in his Optimus Prime roles between ''WesternAnimation/TheTransformers'' (1986) and the ''Film/TransformersFilmSeries''.
187** This is also apparent in the G1 show itself. Slag of the Dinobots is probably the most notable example; his voice was very gruff and low, but starting in the movie, Slag started to lose some of his lower quality. Even Neil Ross, his voice actor, is unsure of how Slag got so off track, since the voice director would usually give play a sample of what the character sounded like if they got off track. Skywarp is another example; his voice seemed to fluctuate in every episode he appeared on. Mixmaster's first line in ''Heavy Metal War'' is very different-sounding from his later lines, being lower and less crazy. Starscream is known for having a rather high and shrill voice (hence the name), so it can be pretty jarring to rewatch the FiveEpisodePilot and hear how... well, ''normal'' he sounds.
188** When Creator/FrankWelker returned to being Megatron in ''WesternAnimation/TransformersPrime'' and the video games based on the movie series, his voice had become much quieter and more sinister rather than "screechy". It was very deliberate on Welker's part: the G1 version, higher, screechier, and even a little ill-sounding, was always pushing his voice so Welker couldn't emote properly with it. By pulling it back in, Megatron isn't permanently shouting--it has more impact when he does shout, and the rest of the time he can be in, as Welker himself put it, "more of an acting place". While recognizable enough that you don't say "why'd they bother getting him back if the voice is ''totally'' different?" they fit the more formidable Megs of this decade.
189*** His performance as Megatron in ''Transformers Prime'' is also much lower in pitch than his performance as the ''Generation One'' Megatron, including the latter's appearance in ''VideoGame/TransformersDevastation.''
190*** This can be extended to him voicing his live-action movie counterparts in ''[[Film/TransformersAgeOfExtinction Age of Extinction]]'' and ''[[Film/TransformersTheLastKnight The Last Knight]]''. However, while his voice is similarly deep and gravelly, unlike his ''Prime'' voice, Frank's take on live-action Megatron is more of a constant snarl brimming with barely-restrained rage. The two voices can overlap when both versions are sufficiently enraged, but most of the time, both contemporaneous cases of VocalEvolution are mostly distinct.
191** Similarly Creator/CoreyBurton's take on Shockwave (confirmed to be an imitation of DavidWarner) evolved slightly between interpretations. In G1, he is hammier and bordering on NoIndoorVoice. When he reprised the role in ''WesternAnimation/TransformersAnimated'' he sounds more soft spoken, the allusions to it's inspiration more evident.
192** Starscream's Hungarian voice from the same show changed drastically from the beginning of the series to Season 2. At first, he sounded like a somewhat younger and less raspy version of the original (the same as Hungarian [[WesternAnimation/BeavisAndButthead Beavis]]). Now, he talks in a near-constant high-pitched, shrill tone, making him sound exactly like his voice actor's performance as Gollum from ''Film/TheLordOfTheRings''.
193** Grimlock in ''WesternAnimation/TransformersRobotsInDisguise''. For the first few episodes, Creator/KharyPayton's voice for him was indistinguishable from his Cyborg voice. As the series progressed, though, it became alot more gruff, similar to Gregg Berger's portrayal from G1 and ''Fall of Cybertron''.
194* A few examples in ''WesternAnimation/{{Metalocalypse}}'';
195** In a Music/Animation crossover, compare the singing on Dethklok's ''The Deth Album'' to that on Deth Album II. Brendon Small has gotten more versatile with Nathan's singing voice - it's still 98 percent death grunt, but there are moments of flexibility.
196** Additionally, Toki's voice appears to have gotten higher and squeakier as the series has gone on.
197* ''WesternAnimation/{{Arthur}}'':
198** Muffy has been voiced by the same actress since day one, unlike most of the kids, but her voice has gotten higher throughout the seasons.
199** Binky's voice was a bit deeper in the early episodes.
200** Luke Reid, the first voice actor to portray Brain, got really deep before they replaced him. As did Michael Yarmush, the first Arthur.
201** Molly's voice was higher in the early appearances as well.
202* ''WesternAnimation/KingOfTheHill'':
203** Hank Hill originally spoke like [[WesternAnimation/BeavisAndButthead Tom Anderson]], later developing a less gruff voice.
204** Peggy Hill originally spoke in a more reserved tone, before developing a more excited way of speaking as her ego got out-of-control.
205** Dale Gribble's voice also got higher as he became more of a goof. His Texas accent also disappeared in favor of an almost Yankee sounding one.
206** Also Bobby's voice has become more higher pitched in later years.
207** Bill's voice in the first season was lower and gruffer before developing into a higher dopier voice in the second.
208** Luanne had a lower huskier voice before developing into the ditzy Valley Girl voice.
209** Breckin Meyer's voice for Joseph originally had the exact same tones and inflections as Brittany Murphy's voice for Joseph did (essentially sounding like a deeper version of Murphy, which of course was the intention), but as the series progressed, Meyer's Joseph developed a harsher, almost angry sounding tone, probably to show how his voice continued to evolve post-puberty.
210** Kahn's voice was slightly lower in the early episodes.
211** Connie's voice is softer and slightly accented early on as well.
212* ''WesternAnimation/KaBlam'':
213** Many characters had their voices go lower as the series went on. The Off-Beats, Loopy, Larry, and most recognizable are Henry and June. This was due to them all being played by actual kids at the time. Unlike most examples of shows with kid voice actors, both Henry (Noah Segan) and Larry's (unknown) voice actors were kept even after their voices broke.
214** The Flesh in ''Action League Now!'' sounded more heroic in the earlier shorts (though note that a few of them aired OutOfOrder), including the ones that aired when the short was still on ''Series/AllThat''
215** Bob's voice was lower in the first few ''Prometheus and Bob'' shorts.
216* ''WesternAnimation/{{Rugrats}}'':
217** Tommy's voice sounded a little higher and rougher in earlier episodes than what he would sound like later on.
218** When Joe Alaskey first took over the voice of Grandpa Lou after the death of David Doyle, he was very high-pitched, like WesternAnimation/DaffyDuck on crack. Over the next few years he lowered the pitch to the point where it was a passable imitation.
219** For the first couple episodes David Doyle's Grandpa Lou's voice was gruffer and raspier.
220** Angelica's voice was always Cheryl Chase's own voice tweaked a little bit, but in Seasons 1-6, it was more noticeable that it was Cheryl's own speaking voice. In the Kimi era, her voice gets slightly higher. However in the ''Tales from the Crib'' DVD movies, her voice noticeably reverts back to Cheryl's and sounds noticably more like Cheryl than she did in the show's entire run.
221** When the kids were aged up in ''WesternAnimation/AllGrownUp'', their voices became lower and more mature sounding, with Chuckie (Nancy Cartwright's version) and Phil being the only ones who sound pretty much the same as they did when they were babies, minus the baby inflections.
222* ''WesternAnimation/ChalkZone'':
223** Rudy's voice was a lot higher in the first two shorts on ''WesternAnimation/OhYeahCartoons'' (sounding similar to [[WesternAnimation/{{Rugrats}} Tommy Pickles]], who E.G. Daily was also playing at the time, but slightly lower). When he was aged up from eight to ten in the second season of ''WesternAnimation/OhYeahCartoons'' (following a request from Nickelodeon to age him up for when the short became a TV show), his voice lowered a bit, but was still higher than his voice in the show itself.
224** Snap's Brooklyn accent got thicker as the show went on; some earlier episodes (especially the original shorts) have a few cases of OohMeAccentsSlipping regarding it.
225** Penny originally had a lisp in some of her earlier appearances in the ''Oh Yeah! Cartoons'' shorts, but Hynden Walch dropped it in Season 1.
226* ''WesternAnimation/TotalDrama'' has noticeable examples of this;
227** While subtle, both [[EnsembleDarkhorse Noah and Cody]] have deeper voices in the second-season special and the third season than they did in the first season. They've also grown noticeably taller. Noah's is even deeper in [[WesternAnimation/TotalDramaPresentsTheRidonculousRace the spin-off]]; it also becomes more [[DeadpanSnarker deadpan]] and less [[AmbiguouslyGay camp]] as time goes on.
228** In the first few episodes Owen sounds like a buff jock character[[note]]Note that his VA also does [[ChickMagnet Trent]][[/note]]; from "Phobia Factor" on his tone sounds a lot goofier.
229** Just about everyone's voices became higher to some extent.
230* All the preteen characters in ''WesternAnimation/JacobTwoTwo'' suffer from this to some extent or another, but none moreso than Buford. In his first appearance, he sounds younger than ten-year-old Jacob, but this doesn't last long. By the end of the fifth season, his voice has aged so much that the producers pitch it up to make it sound younger, particularly noticeable in the episode "Jacob Two-Two and the Too Big Tomatoes."
231** Just the opposite applies to resident janitor Leo Louse's mother, whose voice is provided by the same actor as Leo himself. In her first episode, her voice was pitched up to make it sound more feminine. However, in all subsequent appearances, the processing is left out and the actor applies a high-pitched old woman sound to his own performance.
232* ''WesternAnimation/BobTheBuilder'':
233** Lofty has several examples of this:
234*** For the American dub, Lofty was performed by [[CrossDressingVoices a female voice actor]] during the original series. The feminine quality in his voice is more noticeable in earlier episodes such as "Wendy's Busy Day" and "Muck Gets Stuck", although it gradually becomes more masculine in later seasons. (Despite this, he remained a male character in both US and UK dubs.) Starting with the "Project: Build It" era, the character (unlike the rest of the machines) gets a second voice actress (Emma Tate) and starts to sound more childlike. When the series switched to CGI for the third era (Ready, Steady, Build!), Lofty completely loses the feminine quality in his voice, and, while still sounding younger, now sounds more raspy.
235*** In the UK, Lofty (played by Neil Morrissey) sounds more like a high-pitched adult compared to the American dub. (However, his voice is a bit deeper the earliest episodes of the first season, noticeably in "Muck Gets Stuck".)
236*** Compared to all this information, Lofty's voice is actually more deeper in the Spanish (both Latin American and especially European), Catalan, Cantonese, and Welsh dubs.
237** Like Lofty, Bob has received several voice actors in the American dub. While Neil Morrissey voices him (and Lofty) in the UK dub, Bob's American voice has been provided by William Dufris, Creator/GregProops, and Marc Silk.
238** In the American dub, most of the characters, aside from Lofty and Bob, receive voice changes starting with the second half of the "Project: Build It" era and then again for the CGI era.
239** Also for the US dub, Spud was originally voiced by Alan Marriott during the original era, but starting with "Project: Build It", his UK voice, provided by Rob Rackstraw (which is a bit deeper, compared to his original American voice) remains unchanged. (In earlier episodes, his UK voice sounded more nasally.)
240* ''WesternAnimation/VeggieTales'':
241** Some of the characters have come to sound more like each other, most notably Archibald, the tall Scallion, and the "Silly Songs with Larry" narrator. This is eventually lampshaded, when Larry says he always thought Archibald was said narrator (even though they were clearly separate characters from their first appearance).
242** When comparing Larry's voice in earlier episodes to those in his more recent appearances (take "The Water Buffalo Song" versus "Sport Utility Vehicles") he has a much higher-pitched voice and sounds far less dopey than he originally did.
243* ''WesternAnimation/BeavisAndButthead'':
244** Butthead's voice became slightly higher (but still much lower than Beavis' voice) and gained a distinctive lisping accent as the show progressed. The lisp became especially obvious in the movie ("Hey, Beavisth! Thisth sucksth!").
245** In between the end of the show, and when Creator/MikeJudge would start breaking them out for special appearances, Beavis' voice has gotten noticeably lower.
246** Before she got [[WesternAnimation/{{Daria}} her own spin-off]], Daria's voice was higher and more expressive in her earlier appearances on ''Beavis and Butt-head''. As the show went on, she started sounding closer to how she does in her own show.
247* ''Franchise/ScoobyDoo'':
248** Creator/DonMessick's voice for Scooby was originally more high-pitched and less raspy before transitioning to the voice everyone's more familiar with today.
249** Creator/FrankWelker's performance of Fred Jones became more goofy and comical since the late 90s. And occasionally developed a Minnesotan accent. As of ''WesternAnimation/BeCoolScoobyDoo'', Welker's Fred voice has returned to a style reminiscent of his early portrayal of Fred.
250** While on the subject of Frank Welker, his version of Scooby in recent years has almost completely lost his speech impediment and speaks both clearly and more frequently.
251** Creator/CaseyKasem's Shaggy became slightly slower and rougher as he aged.
252** Kasem's successor, Creator/MatthewLillard, sounds less like Kasem now than he did when he portrayed Shaggy in the [[Film/ScoobyDoo live action films]], becoming higher-pitched and more goofy since he started playing Shaggy in animated form.
253** Heather North and Nicole Jaffe's voices for Daphne and Velma respectively had worn down due to age in ''WesternAnimation/ScoobyDooAndTheLegendOfTheVampire'' and ''WesternAnimation/ScoobyDooAndTheMonsterOfMexico''. They never returned to their roles after that.
254** Being voiced by an actual kid in this production, Fred's voice actor in ''WesternAnimation/APupNamedScoobyDoo'' clearly went through puberty over course of the series, and his voice is noticeably deeper in later episodes.
255* ''WesternAnimation/TeenTitans2003'':
256** Beast Boy had a deeper voice the first season, most likely the lowest of the Titans. His voice became more high pitched, likely to accentuate his goofy personality and because he is the ''youngest'' Titan.
257** In contract to her low and deadpan voice, Raven had a high-pitched voice in the first season. Interestingly enough, most if not all of Creator/TaraStrong's other roles on the show are in a completely opposite tone, opting instead for a chipper, Starfire-esque voice. [[ActingForTwo Kitten and Kole are two such roles appearing in the same show]]. Raven's voice in ''WesternAnimation/TeenTitansGo'' sounds noticeably less deadpan than she did in the original series. It's unknown how much is due to how different the character is and how much is due to the fact ''Go'' came out almost ten years after the original.
258** While on the subject of ''Teen Titans Go!'', Creator/HyndenWalch's voice for Blackfire is noticeably deeper in ''Teen Titans Go!'' than it was in the 2003 show.
259* ''WesternAnimation/CodeLyoko'' has several drastic examples, and these are just from people who [[TheOtherDarrin kept the same voice actor]]:
260** First, and most unfortunately, is Jeremie, voiced by an adult woman, Sharon Mann. He began with a very high voice at the beginning of Season 1, which gradually deepened over the course of the season and stayed deep through the next. Then, in Season 3, it switched abruptly back to a higher tone, sounding just a twitch deeper and more nasally than early Season 1, which he keeps for the rest of the series.
261** Aelita's voice is lower and matronly near the beginning of the series, but after she leaves the supercomputer, her voice slowly becomes higher-pitched and girlish.
262** Odd's voice begins somewhat lower and calmer, perhaps trying to emulate the sound of his [[TheOtherDarrin previous voice actor]], but gradually gets higher and screechier until it crystallizes into his iconic tone.
263** Several background characters without many lines early in the series, such as Herb and Mr. Ishiyama (who sound like William in their first appearances) and Mr. Delmas (who is far more nasal in "Teddygozilla"), have voices that sound nothing like those established later on.
264** William's voice gets lower and less shouty during Season 4. This may have been to reflect Clone William's difference in personality, but it's kept for William after he returns.
265* Andy Berman's voice for Dib on ''WesternAnimation/InvaderZim'' tends to go back and forth. Sometimes he has a higher, faster-paced voice as he did on the debut episode; other times, his voice is lower and rougher, and he talks more slowly. The latter voice makes him sound more like a teenager.
266* In ''WesternAnimation/SilverHawks'', main villain Mon*Star originally had a very deep voice, but as the episodes wore on, it got higher and higher, until voice actor Earl Hammond was using the same screechy voice for Mon*Star as he was for Vultureman on sister show ''WesternAnimation/ThunderCats1985''. It was particularly jarring during his TransformationSequence, since it still used the original voice and was never re-recorded.
267* Pretty much all of the voices for ''WesternAnimation/RegularShow'' have become more upbeat since the characters' first appearances in early short films made by the show's creator, J.G. Quintel.
268** Sam Marin (who voices Pops, Benson, and Muscle Man) is noticeably calmer as Pops in the pre-''Regular Show'' short ''The Naive Man from Lolliland'', and as Benson in ''2 in the AM PM''. The latter also has Quintel using a much quieter tone for Mordecai (although it's still Quintel's natural speaking voice).
269** Quintel, Marin, and William Salyers (Rigby) all kept their noticeably quieter deliveries on the ''Regular Show'' pilot, which also had Creator/MarkHamill using a more clipped and gruff delivery for Skips. By the time the show made it to series, everyone's delivery suddenly became a lot more energetic, and Skips' voice became a bit more natural.
270* In the early pilot of what would later become ''WesternAnimation/TheProblemSolverz'', Alfe started out with a normal voice that was only slightly low. In ''WesternAnimation/NeonKnome'' he became a very low growler which was lightened up in the ''The Problem Solverz'' to reflect his more impetuous personality. Roba's voice was also lower in the first pilot, and since then it's gotten higher with a robotic filter added on. Horace has a [[TheOtherDarrin different voice actor]] for the series as well.
271* ''WesternAnimation/{{Doug}}'':
272** The title character's voice (in the Nickelodeon series, played by Creator/BillyWest) was much more high pitched and nasal in the pilot, "Doug Can't Dance". Around Season 4, Doug's voice noticeably gets lower and closer to [[WesternAnimation/{{Futurama}} Fry's]] voice. Then ''Doug'' crossed over to ABC and West was replaced by Thomas [=McHugh=] after wanting nothing to do with the new version of ''Doug'' – [=McHugh's=] Doug voice is even lower and less nasal than West's was by the end of the Nickelodeon series.
273** Patti is a little softer and Skeeter is a little more nasal in the first season.
274** Connie and Patti both sound lower in the Disney episodes.
275* ''WesternAnimation/HeyArnold'' has all the kids voiced by real kids that matched the age of the kids on the show. Some got replaced when their voice changed (most noticeably Arnold, who had five voice actors) but a lot of them also remained, even a huge number of the boys:
276** Gerald's voice changed quite early on, but since they couldn't find a new actor to replace the original, they used it as a plot point and thus he didn't have to be replaced.
277** Helga's voice became much more mature sounding.
278** Phoebe's voice actually became higher as the series progressed. Likely because her voice actress was getting older and had to put more force into her voice to sound like a 9-year-old.
279** Other characters like Harold and Stinky just went through their voice change without any explanation to the viewers.
280* Jimmy's voice for ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' TV series is quite a bit lower and deeper than it was in [[WesternAnimation/JimmyNeutronBoyGenius the movie]], probably meant to signify that he had gotten older since the events of the movie. Sheen's voice also changed after the movie.
281* In the Internet cartoon of ''WesternAnimation/MakingFiends'', Charlotte sounded like an actual little girl, and Vendetta had a high, shrill voice with a thicker accent (specifically, Southern European). In the TV cartoon, they have the same voice actors. Charlotte's voice is still high and cheery, but she sounds more like a kindergarten teacher than an 8- to 10-year-old girl, and Vendetta's voice is lower, more guttural and overall less pleasant to the ear (though it never ''was'' pleasant), to the point where her accent began sounding more Middle Eastern than the intended Southern European accent. Marvin's voice is actually higher, and more nasal, unlike in the web cartoon where he had a nearly SimpletonVoice. Malachi's voice went from [[YeOldeButcheredeEnglishe archaic]] and mature, to whiny and comical.
282* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' have many instances of their characters pitches change throughout the show:
283** Rarity has seen her vocal quirks (pitch shifting and OohMeAccentsSlipping) becoming more and more prominent as the series has gone on. Pinkie Pie on the other hand has exhibited vastly increased range. Previously limited to her usual excited squeak, she increasingly slips into a much lower, more mature voice when voicing more dramatic scenes. Sweetie Belle has also changed noticeably, losing her slur and becoming much less childish, sounding more and more like the actress who portrays her.
284** Applejack started off with a higher pitched voice similar to Rainbow Dash. Ashleigh Ball, who [[ActingForTwo voices both characters]], intentionally lowered Applejack's voice later in the series to differentiate the two.
285** Fluttershy, mimicking [[ShrinkingViolet her personality]], started off extremely quiet and awkwardly pronouncing and tended to murmur and whisper everything. In later episodes (starting about halfway through the first season), she has a slightly more confident and perkier tone, likely due to CharacterDevelopment.
286** Sweetie Belle's voice in the Polish dub of Season 2 is a bit more mature when compared with her performance in Season 1. This is due to voice actress hitting puberty.
287** The same thing happened with Sweetie's English VA as well. Compare her voice in Season 4 to her voice in Season 1. Her days as "Squeaky Belle" are all but over.
288** Apple Bloom's voice became lower and developed a Southern Accent starting in Season 2. After the CMC have [[spoiler:acquired their cutie marks]] Apple Bloom’s first line in the subsequent song is really low and rough, prompting jokes about instant puberty. Oddly enough the rest of the song is delivered as normal.
289** Princess Luna's voice has also changed between seasons, even after you take into account the hamminess from "[[Recap/MyLittlePonyFriendshipIsMagicS2E4LunaEclipsed Luna Eclipsed]]".
290** Diamond Tiara's voice became lower in "Ponyville Confidential", though it went back to the original pitch later.
291** Sunset Shimmer’s singing voice lowers with every song, from “Grumpy Twilight Sparkle” in ‘Welcome To The Show’, a much fuller deeper sound in ‘My Past is Not Today’ and ending in what could almost past for a male singing voice in ‘Acadeca’. This is clearly an attempt to distinguish it from Twilight’s singing voice, as the same voice actress, Rebecca Shoichet, provides both.
292*** The evolution continues. In "Embrace the Magic", Sunset's apparently gone country.
293** Since the beginning of Season 6, the voices of some characters are noticeably higher-pitched. In particular, Twilight Sparkle sounds ''younger'' than she ever has before, despite growing up both figuratively and literally since the show started.
294** Scootaloo's voice has also noticeably matured in Seasons 5 and 6.
295** Starlight Glimmer's voice underwent a noticeable change after the end of Season 5's HeelFaceTurn, becoming younger and more energetic sounding to note her Character Development. The difference was so pronounced that some people were surprised to learn that it was Creator/KellySheridan doing Starlight's voice both Pre and Post-Heel Face Turn.
296* ''WesternAnimation/TheSmurfs1981'': Paul Winchell's Gargamel sounded more like [[WesternAnimation/WackyRaces Dick Dastardly]] early on but started to show some wear as the series went on. Even his Dick Dastardly on ''Yogi's Treasure Hunt'' (1985-88) started sounding like late Gargamel.
297* Regina King, the voice of Huey and Riley from ''WesternAnimation/TheBoondocks'', had managed to give both characters more distinctive voices over the three seasons.
298* ''WesternAnimation/ThomasAndFriends'':
299** A more unique case for the narration, Creator/MichaelAngelis originally narrated the show in a faster, more excited tone. As seasons progressed his storytelling style became slower and more mellow sounding. His voices for some of the engines also changed. This is even more noticeable due to stories from earlier seasons he has renarrated for audiobooks and other projects later on. Also, George Carlin sounds noticeably deeper and more soft-sounding in the fourth season compared to the first three.
300** For the later CGI episodes, Rupert Degas' voice for Flynn became rather higher and younger sounding within the course of only four appearances.
301** Ben Small's voice for Thomas himself has gradually become more nasal and helium pitched in the UK dub. Meanwhile Keith Wickham emphasized a cockney accent more for James, and less for Percy (likely to differentiate them more).
302* All the kids on ''WesternAnimation/MarthaSpeaks'', save Carolina, have definitely changed over the years. Some of them stayed on until they were re-cast due to their voices changing.
303* ''WesternAnimation/TheAmazingWorldOfGumball'' has two examples of vocal evolution brought on by puberty. Logan Grove (Gumball) and Kwesi Boakye (Darwin) were both around 13 when they began voicing their respective characters. Both of them have gotten noticeably deeper in Season 2, ''especially'' Logan, whose delivery also got calmer. Interestingly, their voices cracked even in the first episodes, so change was pretty much inevitable. They were eventually [[TheOtherDarrin recast]] in Season 3, and the season's lead episode even made the voice changes a plot point.
304** In the first season, the voices of several recurring characters (such as Bobert, Alan, Clayton, and Leslie) constantly changed between episodes. This can be attributed to the actors trying to find a voice that worked. By the second season, their voices remained consistent.
305** Anais' voice got deeper after Season 1, and most notably after Season 2, likely due to her voice actress beginning puberty.
306* ''WesternAnimation/DoraTheExplorer'':
307** Kathleen Herles' voice for Dora has become much higher-pitched and more helium sounding in the third and fourth seasons. In the final years of voicing her, she sounds a bit deeper due to adolescence.
308** In the first season, Map's voice is softer and quieter compared to his higher-pitched, hyperactive tone from the second season on. It's noticiable since they use the same recording of his IAmSong every episode.
309** Sasha Toro's voice for Backpack sounds slightly older and deeper in Seasons 2-4.
310* Hamilton Camp's performance as Gizmoduck sounds very different in ''WesternAnimation/DuckTales1987'' compared to his later guest appearances in ''WesternAnimation/DarkwingDuck''. It's a lot less booming, and a lot sillier sounding, sounding similar to when Fenton's superhero voice [[OohMeAccentsSlipping broke character]] when he got excited on the former show.
311* ''WesternAnimation/{{Superjail}}'':
312** ''Superjail'' started with Jared sounding less shrill and with a slight lisp. Alice still had a deep voice, but spoke in a more subdued tone. Their voices would gradually evolve over the course of the first season to their current styles.
313** The Twins had slightly higher voices in the pilot, with the normally higher-pitched one sounding more on the nasal side. The higher-pitched Twin tends to have more vocal variation throughout the series, sometimes sounding only slightly softer than the other to having a much squeakier tone.
314** Gary's perverted cellmate initially had a somewhat nasal voice, but it evolved to become higher and more childish to emphasize his creepy nature.
315** Jean started out with a bit of a Southern accent and a raspier voice, while Paul's vocal delivery was less flamboyant in his early appearances.
316* In early episodes of ''WesternAnimation/GarfieldAndFriends'', [[ComicStrip/USAcres Wade]] only managed to talk-sing during musical numbers. Later episodes have him actually singing.
317* ''WesternAnimation/TheDreamstone'':
318** In the early points, Leonard Whiting originally voiced Urpgor in a much more tranquil, gravelly murmur, much expectant from a usual Igor-type. Throughout the first season, he gradually becomes [[NoIndoorVoice louder]], [[LargeHam hammier and more flamboyant sounding]].
319** Stuart Lock's voice for Rufus also became squeaker pitched and less soft spoken. In contrast Amberley became slightly deeper sounding as Nancy Hendry reached adulthood.
320** John Franklin Robbins's voice for the Dream Maker was also more gruff and relaxed. By the second season he has a more dignified and hammy pronunciation.
321* ''WesternAnimation/TheRenAndStimpyShow'':
322** On ''Ren & Stimpy "Adult Party Cartoon"'', Creator/JohnKricfalusi couldn't figure out how to make Ren's voice sound like it did on ''WesternAnimation/TheRenAndStimpyShow''. As a result, he just did it without pitch-shifting, thus creating a lower, more gruff voice than before.
323** Incidentally, Billy West's first recording of [[TheOtherDarrin Ren's voice]] (for a [[Recap/RenandStimpy2x04SvenHoek "Goodbye" bumper]]) was pitched up, and it sounded very odd. By his [[Recap/RenandStimpy2x08MonkeySeeMonkeyDontFakeDad first full episode as Ren]], it was determined that he could reach the desired pitch naturally. From there, the voice gradually evolved away from Kricfalusi's interpretation, with the accent becoming less pronounced over time.
324** West's voice for Stimpy also started out lower and more deadpan, like an exact Larry Fine impression, eventually becoming higher and more excitable sounding.
325* ''WesternAnimation/StevenUniverse'':
326** By Season 1A Steven's voice had notably deepened, getting closer to Zach Callison's natural voice. Season 3 seems to have reverted it as Steven's voice is ''higher'' pitched sounding in episodes like "Steven Floats" than it originally was. His voice evolved again after the TimeSkip; Callison stopped pitching his voice up and just started using his natural voice, reflecting Steven’s own InUniverse aging.
327** Early in the show, Pearl's voice was notably higher in pitch. It deepens as the series goes on, especially as she goes through CharacterDevelopment. Comparing her voice in [[https://www.youtube.com/watch?v=GIW0CV7TLbo "Steven the Sword Fighter"]] to [[https://www.youtube.com/watch?v=IlrY64sB5Bo "A Single Pale Rose"]] will show a clear difference.
328** In [[Recap/StevenUniversePilot the pilot]], Pearl and especially Steven sound different compared even to the first episode. Pearl has a deeper tone and when she says "Woah, what are you crazy?" to Amethyst her voice is a completely different tone than normally. Steven is extremely different, having both a deeper and a more nasal tone. Even in the intro compared to the pilot itself this happened. Steven's voice is very raspy when he says "And Steven!"
329** In Blue Diamond’s first few appearances, Lisa Hannigan is obviously trying to hide her Irish accent and uses an American one. In later episodes she drops this and more or less just uses her natural speaking voice.
330* George Jetson on ''WesternAnimation/TheJetsons'' sounded very different in the 1985 revival from the 1960s run, despite being voiced by the same actor George O'Hanlon. This was due to O'Hanlon having suffered a stroke.
331** Mel Blanc's take on Mr. Spacely sounds almost unrecognizably soft spoken and refined at the start of the original series, [[SuddenlyShouting only sporadically roaring at Jetson for humor effect]]. Mel Blanc gave him a more consistent gravelly bellow as the series continued, especially in the 80s revival, where Blanc pretty much uses the same register for him as Yosemite Sam.
332** During production of ''WesternAnimation/JetsonsTheMovie'', he and Creator/MelBlanc (Mr. Spacely) both died, with Creator/JeffBergman performing the remaining dialogue, sounding almost exactly like them. Besides shorts and commercials, the first prominent time he voiced them afterwards was in ''WesternAnimation/TheJetsonsAndWWERoboWrestleMania'', where he voiced George with a higher register and Mr. Spacely with a less gruff voice closer to Blanc's earliest portrayal.
333* WesternAnimation/MickeyMouse: It's speculated by many that one of the reasons that Walt Disney stopped voicing Mickey Mouse was because he was having more and more trouble doing the falsetto voice. Disney was a chain-smoker for most of his life; this coupled with age will have an affect on any voice. This is especially apparent during the last times he provided the voice for Mickey, which was the animated intros to Series/TheMickeyMouseClub. Mickey's voice sounds much deeper and at times, raspy.
334** Similar example with Mickey's 3rd actor, Creator/WayneAllwine. For a while, his Mickey voice sounded high pitched, and had a squeak in to it, similar to earlier actors' portrayals. However, before he died in 2009, his Mickey voice somehow lost its squeak, and sounded slightly lower. It's especially notable in his last performance as Mickey in ''VideoGame/KingdomHeartsChainOfMemories'' where the weakness and weariness is apparent. When former Hallmark illustrator Bret Iwan took over, Mickey did get his high pitched-voice back, but lost the squeak almost entirely.
335* On the topic of Mickey Mouse, Russi Taylor's performance as WesternAnimation/MinnieMouse has remained mostly unchanged since 1986. Her final performance as Minnie for the [[Ride/DisneyThemeParks "Vacation Fun" short]] is [[https://www.youtube.com/watch?v=po0Jgi5cQf8 notably much quieter and softer]]. Possibly due to Russi Taylor dying while recording her lines, which explains why Minnie's mostly silent in that short.
336* In the newer episodes of ''Literature/MaxAndRuby'', [[TheOtherDarrin some of the characters got recasted with new voice actors]] when the Series got {{Uncanceled}}:
337** The most notable example would be Ruby sounding older than her previous voice.
338** [[https://www.youtube.com/watch?v=hVG4FWCU8OE In the first three episodes]] Ruby sounded more high pitched and more young. In the later episodes, [[https://www.youtube.com/watch?v=SJi61zNPgdE she was given a less high pitch voice and sounding more of a caring person with a playful tone]]. Every since the show returned in 2009, [[https://www.youtube.com/watch?v=HQkjBi9N_Ng Ruby now sounds more mature with a more Deadpan feel to it.]] She was also given a deeper chuckling type laugh compared to her previous cute giggles in the older episodes.
339** Due to Max being voiced by an actual child, a new voice actor was hired. As a result, Max sounds a little older compared to his voice in older episodes. Most noticeable during the episodes where Max can be heard reading the title for an episode. Max also made more noises such as grunting while mostly silent in the earlier episodes.
340** Martha used to have a cute high pitch voice in early episodes, she now sounds older and not as hyperactive.
341** Roger is a strange case, he used to sound like an actual teenager but now sounds younger than his age.
342** Louise retained the same voice actress since the series began. As a result, while her voice sounds the same it also sounds a little more natural compared to how she sounded in the older episodes.
343* ''WesternAnimation/{{Teenage Mutant Ninja Turtles|1987}}'' (1987): The original voice actors of the boys in green have had their voices evolve over the course of the series.
344** Leonardo's vocal change is easily the most noticeable. Once deep and concentrated, Creator/CamClarke had his voice higher and more superhero-esque as the series became more child accessible in tone.
345** Michelangelo's voice had become deeper and more mellow as the series went on. Originally, he was given a higher and less raspy voice, as Creator/TownsendColeman had based it off of Sean Penn's character in ''Film/FastTimesAtRidgemontHigh''. However, it soon became more recognizable and raspier while still retaining the same energy.
346** Creator/BarryGordon's Donatello was originally his natural voice, but became slightly exaggerated as the series went on.
347** Voice acting giant Creator/RobPaulsen's breakout role was Raphael, maintaining his natural voice through his entire run as the turtle. However, his demeanor evolved with the character, once calmer with his cynicism and later becoming more loud and brash.
348* In the ''WesternAnimation/TomAndJerryDirectToVideoFilmSeries'', the duo are often menaced by three Siamese cats named Tin, Pan, and Alley. When they first appeared in ''WesternAnimation/TomAndJerryMeetSherlockHolmes'', Pan (the one with the goggles and droopy ears) originally spoke in a heavy English accent sounding very similar to one of his voice actor Creator/JessHarnell's more famous role, Wakko Warner from ''WesternAnimation/{{Animaniacs}}''. From his second appearance onwards in ''[[WesternAnimation/TomAndJerryRobinHoodAndHisMerryMouse Robin Hood and His Merry Mouse]]'' he starts talking like Raymond Babbitt from ''Film/RainMan''.
349* During his brief appearance as Alfred in ''WesternAnimation/YoungJustice2010'', Creator/JeffBennett sounds like an older English version of Owen Bennett from ''WesternAnimation/{{Gargoyles}}''. When he reprised the role for ''ComicBook/BatmanYearOne'', his Alfred sounded similar to Brooklyn from ''Gargoyles'', only with an English accent.
350* In ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'':
351** Billy had less of a SimpletonVoice in the earlier episodes (particularly when the show was still bundled with ''WesternAnimation/EvilConCarne''). He started sounding dumber as time went on, which is appropriate because he legitimately ''was'' [[{{Flanderization}} getting dumber]].
352** Irwin initially sounded ''very'' congested and had a bit of a lisp. The lisp went away pretty quickly, and his congestion started fading away significantly. The end result was a very unique sound that fans of the show could easily recognize. Vanessa Marshall also started to incorporate more jive talk in Irwin's dialogue when she discovered the character was African American.
353** Eris originally talked like a ValleyGirl, but ''immediately'' after her first appearance, she switched to a [[FakeBrit British accent]]. This did ''not'' go unmentioned InUniverse.
354* ''WesternAnimation/TheRealGhostbusters'': In a few of the ''very'' early episodes -- "Knock, Knock" in particular -- Creator/MauriceLaMarche sounded a bit more like Harold Ramis when voicing Egon, but after a while he settled in to the "Egon voice" heard throughout the series. The slight Ramis impression later returned for ''WesternAnimation/ExtremeGhostbusters'' to denote an older Egon.
355** In the very early episodes of ''Real,'' such as ''Mrs. Roger's Neighborhood'', Egon's voice is noticeably much lower than it would be in a few episodes time, such as ''When Halloween Was Forever.''
356* ''WesternAnimation/SamuraiJack'':
357** Jack's voice initially sounded like a watered down, slightly accented version of the voice Creator/PhilLamarr would use for John Stewart in ''WesternAnimation/JusticeLeague''. As Season 1 progressed, his voice became softer and his accent more pronounced, and Lamarr became more flexible with the character for episodes such as "Jack vs. Mad Jack" or "Aku's Fairy Tales" (which show Jack acting wildly out of character due to his temper/Aku's twisted storytelling respectively).
358** Creator/MakoIwamatsu originally voiced Aku with a [[ColdHam somewhat monotone, chilling, overall sinister tone, rarely raising his voice at all]]. As the series progressed, Aku became more comedic and displayed a broader range of emotion, frequently losing his temper, with his normal speaking voice rarely going below a shout.
359* ''WesternAnimation/TheFlintstones'': One of the most famous examples: Creator/MelBlanc had a car accident and fell into a coma, and so for a while Barney was voiced by TheOtherDarrin (namely Creator/DawsButler), who imitated the voice Mel had given him. But when Mel recovered and voiced Barney again, he gave him a new voice, one that was deeper and perhaps more [[SimpletonVoice dopey]]. Nobody told him the voice was different, and it stuck; this new voice is almost certainly the one you're picturing now. Said voice was, incidentally, much closer to that of Barney's inspiration, Ed Norton from ''Series/TheHoneymooners'', which Blanc had refused to imitate at first.
360** When Henry Corden took over the voice of Fred Flintstone after the death of Alan Reed he started out sounding nearly identical, around the late 90’s-early 2000’s his voice became higher and raspier.
361* ''WesternAnimation/ReadyJetGo'':
362** In Season 2, Sean's voice gets deeper and raspier due to William Ainscough going through puberty.
363** Mindy's voice started off soft and with a slight lisp (it's especially noticeable in the online game ''Mindy's Constellation Exploration''), but over time, it becomes much louder and nasal.
364* In ''WesternAnimation/DragonTales'', Max's voice sounds slightly deeper in Season 3 due to his voice actor hitting puberty between Seasons 2 and 3.
365* ''WesternAnimation/CaptainFlamingo''
366** Kirsten originally sounded normal and plain in her first two appearances due to being voiced by Vanessa Thompson, an actual child actor, but once Creator/StephanieBeard replaced Thompson starting with "[[Recap/CaptainFlamingoS1E16TheLastStandFiftyWaysToLeaveYourLiver The Last Stand]]", her voice got higher-pitched and squeakier.
367** Wendell's voice became a bit deeper towards the beginning of the second season and goes even lower during Season 3 due to his voice actor Creator/ColeCaplan going through puberty.
368* ''WesternAnimation/MikeLuAndOg'': Lu's voice was little more breathier in the pilot compared to the series proper.
369* In ''WesternAnimation/PhantomInvestigators'', Andrew Decker used his natural voice for Casey in the first half of the series. By "Haunted Dreams", his voice started to get higher pitched and a bit squeakier.
370** In the first episode, Navarro's voice sounded almost identical to the voice Creator/RichardCansino used for [[Manga/RurouniKenshin Kenshin]] but with a slight Latino accent. His voice became a bit lower and his accent became more prominent as the show went on.
371* ''WesternAnimation/YogiBear'': In the original shorts, Creator/DonMessick's voice for Boo Boo sounded like he was congested or had a cold. Starting with ''WesternAnimation/HeyThereItsYogiBear'', this aspect vanished, allowing more expression in the voice.
372* ''Franchise/Ben10'': When voicing Vilgax in the [[WesternAnimation/Ben10 original series]], Creator/SteveBlum used a very guttural voice that left little room for little personality. After Creator/JamesRemar played the character in the first two sequels, Steve would reprise the role in ''WesternAnimation/Ben10Omniverse''. There, the voice was much more subdued, allowing his Vilgax to make snide remarks and emphasize being manipulative and cunning.
373* ''WesternAnimation/JackieChanAdventures'': Jade and Paco's voices deepen as their actors matured. Jade started in Season 3, and Paco's around Season 4.
374* ''WesternAnimation/TheRaccoons'' has many examples....
375** Ralph had a dryer tone to his voice/personality as the series progressed.
376** Bentley's voice became raspier as his VA went through puberty. This carried over to his second VA, who also made the character sound even younger.
377** Mr. Willow has a Southern accent in his first appearance in "The Chips Are Down!", but in later episodes, his voice has a warmer tone.
378* ''WesternAnimation/GravityFalls'':
379** It took Alex Hirsch a few episodes to settle into his Grunkle Stan and Soos voices. They sound a little off and unusually high-pitched in the beginning.
380** Bill Cipher sounds more calm and nasal in his first appearance in "Dreamscaperers", compared to his more higher-pitched and hammy voice in the next season.
381* Listen to Penny Proud from the first season of ''WesternAnimation/TheProudFamily'', and then hear her in the later episodes as Creator/KylaPratt went through puberty. You can easily hear Penny sound more like a SassyBlackWoman than a sassy black 14-year-old girl. Her voice has changed even more in the revival ''WesternAnimation/TheProudFamilyLouderAndProuder'', due to the two decade gap between the original and revival. Oscar, Trudy, Zoey, and Wizard Kelly's voices have also gotten lower and more gruff in ''Louder and Prouder'', while [=LaCieniga=] now has a more high pitched [[ValleyGirl Valley Girl-ish]] voice.
382* In the first two seasons of ''WesternAnimation/BobsBurgers'', Dan Mintz's voice for Tina would never raise beyond a monotone. By Season 3, Tina retains her monotone voice, but would start occasionally shouting when provoked.
383* ''WesternAnimation/YoungJustice2010'':
384** When Robotman of the ''ComicBook/DoomPatrol'' first appeared in ''Outsiders'', he appeared in a bit parodying ''WesternAnimation/TeenTitansGo'', complete with Creator/KharyPayton just reusing his Cyborg voice for Cliff. When Cliff returns for ''Phantom'', Payton is now doing a KinderAndCleaner version of Creator/BrendanFraser's [[Series/DoomPatrol2019 rendition of the character]].
385** [[spoiler:Season 4, ''Phantoms'', sees Creator/KariWahlgren reprise the role of Saturn Girl, one of her two main roles in ''WesternAnimation/LegionOfSuperHeroes2006''. On ''[=LoSH=]'', she'd given the character an similar English accent similar to what she'd later give [[WesternAnimation/HulkVs The]] [[WesternAnimation/TheAvengersEarthsMightiestHeroes Enchantress]] and [[WesternAnimation/WolverineAndTheXMen2009 Emma Frost]]. In ''YJ'', Saturn Girl sounds more akin to [[WesternAnimation/DCAnimatedMovieUniverse Starfire]], [[Franchise/Ben10 Charmcaster]] or even Wahlgren's ''other'' main role on ''[=LoSH=]'', Triplicate Girl/Duo Dasmel.]]
386* ''WesternAnimation/{{Superfriends}}'': Mr. Mxyzptlk was originally given a squeaky voice by Creator/FrankWelker for his first two appearances in the ''New Super Friends'' episode "The Rise and Fall of the Super Friends" and the ''World's Greatest [=SuperFriends=]'' episode "The Planet of Oz". Starting with the 1980 series, Mxyzptlk's voice started to sound more like the one Frank Welker used for the show's incarnation of Toyman.
387* ''WesternAnimation/RockosModernLife'' has some of this, naturally.
388** Rocko's voice was deeper in the first season.
389** In "Rocko's Happy Sack", Filburt's voice was pretty deep and deadpan. Later on, his voice would become a little higher before settling into a middle ground.
390** Heffer's voice is a lot deeper in Season 1.
391* In the earliest episodes of ''WesternAnimation/CatDog'', Dog had a deeper voice and [[SimpletonVoice sounded a lot stupider.]]
392* ''WesternAnimation/PetAlien'':
393** In the second season, Creator/CharlieSchlatter's voice for Tommy got a bit higher and whinier, making Tommy sound younger compared to the teenage-sounding voice he had in the first season.
394** In Season 2, Gumpers' voice went from slow and lethargic to sounding higher and more energetic.
395* ''WesternAnimation/AmericanDad'':
396** Stan's voice in the first few seasons was deep and booming. As the series went on, his voice became slightly higher and lost most of its boom. [=Seth MacFarlane=] has said that Stan's voice was very hard on his vocal cords and likely changed the voice for this reason. As of about 2020, his voice began sounding hoarse, likely due to aging and vocal strain.
397** Roger's voice was originally a loose Creator/PaulLynde impression, but over time, got a bit lower, more nasal and, in later seasons (like Stan), hoarse.
398** Hayley's voice sounded higher-pitched in earlier seasons, before settling into a much deeper contralto.
399** Steve's voice got higher-pitched and louder as the series went on.
400** Klaus's voice started out lower and he spoke with a thick German accent. His voice got higher and he lost most of the accent in the later seasons.
401** Francine's voice has gotten a bit lower and more shaky during the later seasons, probably due to Creator/WendySchaal aging.

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