Luis Mas is the professional name of Luis González Mas, a Spanish voice actor born on August 13, 1950, who has built an extensive career dubbing animated series and films for Spanish audiences. He is particularly well-known for providing the Spanish voice for a wide range of characters in anime and Western animation.

Mas has a substantial portfolio of work in Japanese anime, having lent his voice to numerous series and films. In the Pokémon franchise, he has voiced several characters across different series and specials. This includes the role of Oscar in the television special Mewtwo ~Kakusei e no Prologue~, as well as characters such as Blaine, Mr. Shellby, Professor Serbal, Matthew, Lirio, and Cornelio in various Pokémon series. He also voiced Dino Sable in the series Dinozaurs: The Series. His work extends to Studio Ghibli films, where he voiced the pivotal role of The Bamboo Cutter in the Spanish dub of The Tale of the Princess Kaguya. Another notable anime role includes the Conductor in Gauche the Cellist.

Beyond these specific examples, his voice work in anime is extensive. He is the Spanish voice of the Third Hokage, Hiruzen Sarutobi, in both Naruto and Naruto Shippūden. Other significant anime credits include the King of Cats in The Cat Returns, Kincho Daimyioujin in Pom Poko, a leper in Princess Mononoke, Teiji Moriya in the first Case Closed movie, Basque Grand in Fullmetal Alchemist, Paletti in D.Gray-man, Mug in Kouchuu Ouja Mushiking ~Mori no Tami no Densetsu~, and Inspector Basilio (Zenigata) in Lupin III: Part III.

In addition to his prolific anime dubbing, Mas is also recognized for his voice work in non-Japanese animated productions and live-action films. He is the Spanish voice of Denzel Crocker in The Fairly OddParents, Lotso in Toy Story 3, Anton Ego in Ratatouille, the Cheshire Cat in the live-action Alice in Wonderland films, and Hank in Finding Dory. His live-action dubbing credits also include characters like Jetfire in Transformers: Revenge of the Fallen and Commander Walters in the Sonic the Hedgehog live-action films.