Defender 2 (NES) and Punch-Out!

[Graham Mitchell]

Shame on me for never noticing this throughout the years, but take a look at this video:

http://www.youtube.com/watch?v=aCfNkVkCn9M

Defender 2's music is all ripped from punch out. There must be some explanation for this, most likely that whoever did the Punch-Out! music also worked on this game, but you'd think there'd be some copyright issues with that. I know HAL labratory is basically a 2nd party Nintendo developer at this point, but were they even in the NES days?

In any case, it sure is an odd finding...