Joan Massotkleiner is a Spanish voice actor known for his extensive work in dubbing anime and international productions into Spanish and Catalan. Born on June 21, 1955, in Girona, Catalonia, Spain, he has built a prolific career spanning several decades, lending his voice to a wide array of characters in film and television.

Massotkleiner's filmography is particularly rich in anime, where he has portrayed a diverse range of characters, from villains to authority figures. He is recognized for his role as the villainous Dr. Hell in multiple adaptations of the Mazinger franchise, including the television series Mazinger Edition Z: The Impact! and the original video animation MazinKaiser. In the world of Detective Conan, he has voiced two distinct characters in Catalan dubs: the menacing Vodka, a member of the Black Organization, and the recurring character Jirokichi Suzuki, the wealthy uncle of Sonoko Suzuki.

His voice work extends to other notable anime and animated productions. He voiced the antagonist Sanga in the Spain dub of New Fist of the North Star and took on the role of Zanark in the original video animation Landlock. In the One Piece franchise, he played Schneider in the special One Piece 3D: Mugiwara Chase, and he portrayed Buskirk in Galactic Patrol Lensman. His range also includes the character Príncep Shamas in New Jungle Emperor, Go Ahead Leo! and Dr. Ernst Robinson in Swiss Family Robinson. Beyond these, his credits include significant roles in major franchises, such as voicing Gendo Ikari in various Spanish and Catalan dubs of the Neon Genesis Evangelion series and films, and King Cold in Dragon Ball Super: Broly.

In addition to his anime work, Massotkleiner has contributed to the Spanish dubs of live-action and CGI films. He voiced Senator Ron Davis in the CGI film Resident Evil: Degeneration. His live-action dubbing credits are extensive, including voicing Hound in the Spanish versions of Transformers: Age of Extinction and Transformers: The Last Knight. He has also dubbed roles in Spanish television series such as Gavilanes, The Boarding School, and Águila Roja, as well as the Catalan series El cor de la ciutat. Through his extensive body of work across both Spanish and Catalan languages, Joan Massotkleiner has established himself as a prominent and versatile figure in the dubbing industry in Spain.