Tyler Alexander Mann Diogo Ferreira (1st brazilian voice "I Scream, You Scream")/Sérgio Muniz (2nd speaking voice Brazil) Javier Olguín (Latin America) Dirk Meyer (Germany) Marcel Veenendaal (Netherlands) Krzysztof Szczerbiński (primary voice Poland) Grzegorz Drojewski (sound-alike in some appearances Poland) Antonio Cremades (In Spain) / Miguel Antelo (singing "Evil For Extra Credit" in Spanish) / Miguel Ángel Varela (on Holiday Favorites) / Carlos Bautista (in "It's About Time") Kim Sulocki (Sweden) Samuel Harjanne (Finland) Stefano Onofri (Italy) Eric Aubrahn (France) Dmitry Koryukov (Russia), Dmitry Korolev (in some episodes)
Mitchel Musso Charles Emanuel (Brazil) Johannes Wolko (Germany) Gilan Shahaf (Israel) Abraham Vega (Latin America) Sander van der Poel (Netherlands) Grzegorz Drojewski (Poland) Peter Michael (Portugal) Pablo Tribaldos (In Spain) / Enrique Anaut (first Spanish singing voice) / Miguel Antelo (second Spanish singing voice) / Miguel Ángel Varela (third Spanish singing voice) / Miguel Morant (singing voice in "My Fair Goalie") Niels Pettersson (Sweden Season 1) / Lucas Krüger (Seasons 1 - 4) Sercan Gidişoğlu (Turkey)
Samuel Harjanne (Finland) Charles Pestel (France) Alessio Puccio (Italy) Moser Károly (Hungary) Dmitry Koryukov (Season 1, Russia), Dmitry Korolev (Season 2-Present)
Kelly Hu Hannah Buttel (Brazil) Annevig Schelde Ebbe (Denmark) Katharina Iacobescu (Germany) Michal Reshef (1st voice Israel)/Anat Erlich (2nd voice Israel) Karla Falcón (Latin America) Chantal van de Steeg (1st voice Netherlands)/Donna van Engelen (2nd voice Netherlands) Anna Sztejner (Poland) Joana Freixo (Portugal) Celia Del Diego (In Spain) / Belén Rodríguez ("Night of the Living Pharmacists") / Marta Gómez (singing voice in "Little Brothers") / Cecilia Blanco, Paloma Blanco and Carmen López (chorus) Marie Serneholt (Sweden) Viivi Tamminen (Finland) Edwige Lemoine (France) Joy Saltarelli (Italy) Éva; Dögei (Hungary) Maria Boltneva (Russia), Yulia Samoylenko (in some episodes), Valeriya Zabegaeva (Season 4) Nurhan Yılma (Turkey)
Bobby Gaylor Ronalth Abreu (Brazil) Dominik Auer (Germany) Gilan Shahaf (Israel) Rodrigo Gutiérrez/Alejandro Orozco (only in Hip Hip Parade) (Latin America) Noriaki Sugiyama (Japan) Cezary Kwieciński (Poland) Carlos Freixo (Portugal) Javier Balas (speaking and singing In Spain) / Miguel Morant (singing voice in Season 1 and Season 2 until "Wizard of Odd") / Miguel Antelo (singing voice in "At the Car Wash" and "Gaming the System") / Marta Sam (singing voice in "Nerds of a Feather") Carl-Magnus Lilljedahl (Sweden) Samuel Harjanne (Finland) Paolo Vivio (Italy) Láng Balázs (Speaking voice Hungary)/Sánta László (Singing voice Hungary) Charles Pestel (France) Alex Panayi (Greece) Anton Batyrev (Season 1, Russia), Dmitry Koryukov (Season 2-3), Kirill Zaporozhski (Season 4), Vladimir Mistukov (only in Lawn Gnome Beach Party of Terror)
Diedrich Bader Thadeu Matos (Brazil) Manuel Campuzano (Latin America) Christian Pinilla (Spain) / Miguel Morant and Miguel Ángel Varela (singing To War) Waldemar Barwiński (Poland) (France)