"Battle Theme" is the normal battle theme. It is the ninth track on the first disc in the original soundtrack.
For Final Fantasy X HD Remaster, "Battle Theme" was remastered by Nobuo Uematsu and Tsutomu Narita using real instruments. It received an orchestrated metal arrangement. "I wanted to rearrange the song to have a grander sound while maintaining the mood of the original at the same time," Narita said of the big-band-like upscaling to the "Normal Battle" theme. "Brass and string instruments were already important elements of the original song, so we decided to expand into a full orchestral piece by adding other instruments as well."