Examples of The Other Darrin from The Amazing World of Gumball:
- Gumball was voiced by Nicky Jones (Chowder) in the test pilot, while Darwin was voiced by Jake Pratt (Britain's Got Talent and The Green Balloon Club, for all you UK tropers). When the show moved to series, Gumball was voiced by Logan Grove, while Darwin was voiced by Kwesi Boakye.
- Season 3's "The Kids" uses the voice changing as a plot point, with the duo (and, in turn, the voice actors) trying to deal with their changing voices (and, on a symbolic level, their growing up) by making the most of their childhood. But as soon as it seems that the show is going to stick with having Grove and Boakye continuing to voice Gumball and Darwin, the universe resets itself and suddenly Gumball and Darwin have new voice actors who sound younger. This voice actors being Jacob Hopkins (Gumball)note and Terrell Ransom, Jr. (Darwin)note .
- Starting from the season 5 episode "The Copycats", Hopkins and Ransom were replaced with Nicolas Cantu and Donielle T. Hansley, Jr., with the voice change being done through a joke at the end of the episode. Shortly into season 6, Hansley was replaced with Christian J. Simon starting from the episode "The Anybody" while Cantu was later replaced with Duke Cutler for The Gumball Chronicles.
- Rupert Degas and Lewis MacLeod both left after season 1. Degas's roles were taken by Adam Long (Mr. Small, the hippie guidance counselor), Max Cazier (Clayton), Hugo Harold-Harrison (Tobias, Felix in one episode) and Stefan Ashton Frank (Mr. Robinson). MacLeod's were taken by Steve Furst (Principal Brown), Hugo Harold-Harrison (Ms. Simian, Rockynote ), and Dan Russell (Donut Cop).
- Sussie the chin puppet was originally voiced by Aurelie Charbonnier (the show's storyboard artist and the girlfriend of show creator Ben Bocquelet) in season one when she spoke coherently while Ben Bocquelet did Sussie's voice when she wails, screams, laughs, and makes unintelligible noises. From season two on, Sussie was voiced by Fergus Craig, yet Aurelie's chin was still used for the character and Bocquelet still does the incoherent vocal effects for Sussie.
- In the Italian dub, Gumball and Darwin's voice actors Federico Bebi and Andrea di Maggio were kept around even after their voices cracked... until midway through season 3, where Alessio Puccio and Maura Cenciarelli replace them. The reason is unknown, but probably is because Federico Bebi was recently casted as the titular character of Clarence and they didn't want to have two Cartoon Network main characters with the same voice.
- In the Brazilian dub, Anais was recast in season five, and almost all students in Elmore Junior High changed voice actors for at least one episode, except for Carrie and Ocho (and Penny, if her Non-Singing Voice in "Weird Like You And Me" is disregarded). Bobert changed voices constantly; he had a very robotic voice in the beggining of season one, very hard to understand. He changed voice mid-season and stayed with that voice until the end of season two. He only had one speaking role in season three, with a different voice, and then got another new voice in season four that stayed for the rest of the series (except for early episodes of season five).
- In his first two speaking roles, Louie was voiced by Dan Russell. Starting with "The Extras", Shane Rimmer of Thunderbirds fame took over the role and stayed in it for the rest of the series, being one of his final roles before his 2019 death.
- Almost all voices were recast in the Hungarian version after season 1, save Gumball, Darwin, Nicole, Anais and a few side characters. Season 3 changed even more voices, including Gumball's, Darwin's and Nicole's. Now Anais, Banana Joe, and Penny are the only characters with their original voices.
- In the Italian dub:
- Gumball and Darwin were initially voiced by actual children, Federico Bebi and Andrea Di Maggio. Midway through season 2, their voices began to crack more and more. Early season 3 episodes just pitched up their voices to hide the cracking, but starting from "The Shell" they were recast respectively with Alessio Puccio and Maura Cenciarelli.
- The recasts also touched Gumball and Darwin's Non Singing Voices: in season 1 and early season 2, Gumball's singing was done by Leonardo Caneva, while Andrea Di Maggio did his own singing. in the latter half of season 2 and early season 3, Mirko Fabbreschi did the singing for both Gumball and Darwin. After the speaking voice actors were recast, Fabbreschi continued doing only Gumball's singing while Maura Cenciarelli did her own singing as Darwin.
- Tobias is usually voiced by Stefano Onofri, but for a bunch of episodes in season 4 the role was taken by Leonardo Graziano.
- Julius Oppenheimer Jr. was voiced by Fabrizio Mazzotta in his first appearance, but when he reappeared later on he was replaced with Davide Lepore.
