From Bulbapedia, the community-driven Pokémon encyclopedia.
Michael Sinterniklaas, also credited as Michael Tremain, is an American voice actor who was one of the original voice actors for the English dub of the Pokémon anime.
Michael Sinterniklaas is the founder of NYAV Post, a recording studio located in New York and Los Angeles. Among the studio's clients are 4Kids Entertainment, Bandai Visual - Sunrise, World Leaders Entertainment, Nickelodeon and Funimation Entertainment.
Sinterniklaas has been playing voices on Pokémon since the middle half of Master Quest. His most prominent role was that of Jessie's Seviper until Season 9 when 4Kids gave up their dubbing license.
Voices on Pokémon