Pollock began to provide voices for Pokémon during the fourth season. In the Advanced Generation series, he gained his two most important roles in Pokémon, providing the voice of Raoul Contesta and the narrator, the latter of which he took over from Rodger Parsons. As with most other voice actors who worked with 4Kids Entertainment, he left after the eighth season, when Pokémon USA and TAJ Productions took over the dubbing and distribution of the series.
Pollock returned to the series under the pseudonym Herb Lawrence in Luxray Vision!. In Yes in Dee Dee, It's Dawn!, he reprised the role of Raoul Contesta. Thus, he became the second voice actor to reprise a role of his previously done in the 4Kids dub, after Giovanni's voice actor Ted Lewis.
Famous non-Pokémon roles
- Dr. Eggman (Sonic X, all Sonic games 2005-present)
- Ella (Sonic X)
- Professor Gerald Robotnik (Sonic X and Shadow the Hedgehog)
- Meat (Ultimate Muscle)
- Arthur Hawkins, Crump, Zorc Necrophades (Yu-Gi-Oh!)
- Jean Louis Bonaparte (Yu-Gi-Oh! GX)
- Chef Shiitake (Kirby: Right Back At Ya!)
- Hot Doggone-It (Fighting Foodons)
- Tianne, Heptadd (Chaotic)
- The Professor (Huntik: Secrets and Seekers)
- Helga (Dinosaur King)
- Dr. Moustache (Jungle Emperor Leo)