Listen to Boxing Monster Challenge The King (Instrumental) online. Boxing Monster Challenge The King (Instrumental) is an Instrumental language song and is sung by Gym Motivation Work Out, Boxing Motivation Work Out and Fitness Motivation Work Out. Boxing Monster Challenge The King (Instrumental), from the album Workout Gym Beast Lifestyle, was released in the year 2020. The duration of the song is 2:02. Download Instrumental songs online from JioSaavn.