From Bulbapedia, the community-driven Pokémon encyclopedia.
DuArt Film & Video is an American dubbing company and voice recording studio that picked up the Pokémon anime, starting with The Rise of Darkrai, taking it over from TAJ Productions. They began handling the series, starting with Tears for Fears!.
They also dubbed the short film Pikachu's Island Adventure, which was included on the DVD of Pokémon Ranger and the Temple of the Sea, which was dubbed by TAJ Productions.
PokéPark Wii: Pikachu's Adventure and PokéPark 2: Wonders Beyond have been dubbed by them.