I believe the amazing Pokemon Go BGM is one of the reason the app becomes so popular worldwide. Some Japanese musicians played those musics by real musical instrumental, piano and guitar, and uploaded videos of playing. These are must to watch if you loves Pokemon Go!
This piano playing reminds me of walking to find PokeStops and gain XP. The sound is arranged a bit and very relaxing. It is very nice as a BGM while doing something. Additionally, it is fun to watch how fingers move to make a melody.
Unlike the piano playing video above, this video shows very exciting guitar playing. Stratocaster's single coil sound matches with the music of Pokemon Go. The guitarist plays not only backing but also solo part. That is amazing.
