From Bulbapedia, the community-driven Pokémon encyclopedia.
Jason Paige is a singer who has worked on songs from English dub of the Pokémon anime. He is best known as the singer of the original Pokémon Theme. He also sang on the Viridian City track and provided background vocals for the Pokémon 2.B.A. Master soundtrack.
Paige has had an extensive career outside of Pokémon as well, known for his stand-up parody performances. He currently resides in New York City and was formerly the lead vocalist for the band Blood, Sweat & Tears.