Bubble Bobble (NES)

They may have lost the original arcade source code somewhere along the way, but that certainly never stopped Taito from trying to port Bubble Bobble to anything with a CPU.

Unused Music
Track 35 on the NSF is an interesting folk dance-like tune, normally accessible through the sound test. This tune is not in the arcade version, so it was probably included as a bonus for those who managed to unlock the sound test.

Interestingly, this track was used in the American/Japanese version of Rainbow Islands as the staff roll theme!