Arthur (Brazilian Portuguese dub; fictionalized)

The Brazilian Portuguese dub of Arthur started off with Herbert Richers in at Rede Globo and later on Discovery Kids for Seasons 1-7. Dubbing was moved to XT Produções in for Seasons 8-12, and then to Magic Dub Brazil also in  for Season 13 onwards.

Seasons 1-7
Info from: the Portuguese Wikipedia page
 * Diego Larrea as Arthur Read
 * as David Read
 * as Jane Read
 * Bruno Miguel/Marcos Souza as Buster Baxter
 * Adriana Torres as Francine Frensky
 * Rodrigo Antas as Alan "The Brain" Powers
 * Robson Richers as Binky Barnes
 * Mariana Torres as Muffy Crosswire
 * as Prunella Deegan
 * José Augusto Sendim as Mr. Ratburn

Seasons 8-12

 * Elvira Aída Janota Gonçalves as Arthur Read
 * Jorge Luís Conceição Missaglia as David Read
 * O. Cynthia Glória Baião as Jane Read
 * Bianca Ísis Veggio as D.W. Read
 * G. Munhoz as Buster Baxter
 * Heloísa Conceição as Francine Frensky
 * M.J. Carlota Bragança as Alan "The Brain" Powers
 * C. Eduardo Ivã da Silva as Binky Barnes
 * Eduarda Angélica Dal Agnol as Fern Walters
 * Lizzy Eduarda Cantanhede as Muffy Crosswire
 * Miyoko Hasegawa as George Nordgren
 * María José Úrsula Bragançãos as Prunella Deegan
 * Guilhermina Flávia Câmara as Sue Ellen Armstrong
 * Jorge Luís De Castro as Mr. Ratburn
 * Ca. Carlos Alberto Bragançãos as Mr. Haney
 * Samantha da Silva as Tommy Tibble
 * Ângela Zampaglione as Timmy Tibble
 * María José Isabel Assunção as Ms. Morgan
 * Giuseppina Parravicini as Paige Turner

Seasons 13-present

 * as Arthur Read
 * as David Read
 * as Jane Read
 * as D.W. Read
 * as Buster Baxter
 * as Francine Frensky
 * as Alan "The Brain" Powers
 * as Binky Barnes
 * as Fern Walters
 * Mariana Torres as Muffy Crosswire
 * as George Nordgren
 * as Prunella Deegan
 * as Sue Ellen Armstrong
 * as Ladonna Compson
 * as Mr. Ratburn
 * as Mr. Haney
 * as Tommy Tibble
 * as Timmy Tibble

Seasons 1-7
N/A

Seasons 8-12

 * Xavier Tomás
 * Carlos Manuel Águas
 * Anderson Luís Donnarumma

Seasons 8-12

 * Seasons 8-12 had problems with translation issues. Plus, several of the voice actors retained their Brasília regional accents.