Complex sentence: Paige is best known for singing the original "Pokémon" theme song, and he sings "Viridian City" and as a background vocalist for the Pokémon 2.B.A.
Split into simpler sentences: Paige is best known for singing the original "Pokémon" theme song. He also sings "Viridian City" and sings as a background vocalist for the Pokémon 2.B.A.