Rogelio Guerra was a distinguished Mexican actor whose career spanned several decades, and he was also recognized for his significant contributions to the world of voice acting and dubbing. While he was widely known for his work in telenovelas and films, his voice became familiar to audiences through his participation in numerous dubbed productions, particularly during the first decade of the 21st century. His entry into voice acting was notably active in this period, allowing him to explore a different facet of his performance career.

In the realm of animation, Guerra lent his voice to a variety of projects. He is identified as providing the voice for a character in the anime feature Pokémon Heroes, specifically the film Pokémon Heroes - Latias & Latios, which aligns with the role of Lorenzo. His work in anime also included a role in the film Metropolis. Beyond Japanese animation, his voice was featured in other animated films such as Brother Bear, known in Spanish as Tierra de osos, and the film Robots, as well as The Jungle Book 2. He also contributed to animated series, voicing the character Mr. Rabbit in the popular show Foster's Home for Imaginary Friends for the majority of its run.

Guerra's voice work extended to a wide array of other genres, where he became known for dubbing characters in major Hollywood productions. Among his most recognized performances was providing the Spanish voice for King Théoden in The Lord of the Rings: The Two Towers and The Lord of the Rings: The Return of the King. He also dubbed characters in films like I, Robot, Star Wars: Episode II – Attack of the Clones, Superman Returns, Troy, Stardust, and The Matrix Revolutions. His work in dubbing was extensive, with participation in an estimated forty films of various kinds, showcasing his versatility as a voice actor.