Complex sentence: Bell also appeared in several commercials, such as one for Pokémon Red and Blue, but is best known for his starring roles on Nickelodeon's "The Amanda Show", and its spin-off, Drake & Josh.
Split into simpler sentences: Bell also appeared in several commercials, such as one for Pokémon Red and Blue. He is known for his starring roles on Nickelodeon's "The Amanda Show", and its spin-off, Drake & Josh.