Rui Oliveira is a Portuguese voice actor, born on September 28, 1964, in Porto, Portugal. He has built an extensive career in dubbing, contributing his voice to hundreds of characters in animation and live-action for the Portuguese market. Before his voice-over work, Oliveira's acting career began on stage in 1986, where he collaborated with various theater companies in Porto and also worked as a puppeteer.

Oliveira is recognized for his long-standing and recurring roles within major franchises. In the Pokémon franchise, he has voiced numerous characters across different series and films. Notably, he provided the Portuguese voice for the character Cross in the film Pokémon the Movie: I Choose You!. His other prominent work in this universe includes the roles of Director Oak in the Sun & Moon series and Rotom Drone in Pokémon Journeys.

Beyond Pokémon, his career features several other significant anime and animation roles. He is known for voicing multiple characters in the Portuguese versions of classic anime series such as Captain Tsubasa (where he voiced Alan Takasugui, Carter Taki, and Mark Lenders), Neon Genesis Evangelion (providing voices for Kensuke Aida, Kozo Fuyutsuki, Makoto Hyuga, and Ryoji Kaji), and The Legend of Snow White (as Mestre and Príncipe Richard). His work also includes voicing Marty the zebra in the Madagascar film series and Kamek in The Super Mario Bros. Movie.