Different guitars have different tones, but there's no such thing as a guitar that's distorted vs others that are clean. That is either through your amp or through an effects pedal. He switched guitars for the other tonal properties of his different guitar. But yes, you would be able to switch from a clean sound to a distorted sound with a pedal. You would want a distortion, overdrive, or fuzz pedal, depending on exactly the sound you wanted. Go on youtube and type some of those terms in and listen to how they sound.