Leonardo said:

Here we go... a couple of mild examples..

http://tcrf.net/Pachi_Com_(Famicom)

http://tcrf.net/Pachi_Com_(MSX)

and now, our feature presentation:

http://tcrf.net/Erika_to_Satoru_no_Yume_Bouken

http://tcrf.net/Ganso_Saiyuuki

a canadian example:

http://home.comcast.net/~zphreak/Tetris.txt

This is very interesting.

Here is a article about the differences in The Legend of Zelda localization, my favorite part is the differences in the NES and Famicom Disk System audio.

http://legendsoflocalization.com/the-legend-of-zelda/