The composer probably just used a modern DAW (Digital Audio Workstation) like Ableton/FL Studio/Cubase/etc. There was likely no particular soundchip, though the Nintendo DS did have a soundchip which was limited to 16 channels of PCM/ADPCM sound. Not the best chip ever, but it got the job done mostly. Thats not used for this song, though.
The composer probably just used a modern DAW (Digital Audio Workstation) like Ableton/FL Studio/Cubase/etc. There was likely no particular soundchip, though the Nintendo DS did have a soundchip which was limited to 16 channels of PCM/ADPCM sound. Not the best chip ever, but it got the job done mostly. Thats not used for this song, though.