japanese dc
 

does anyone know how to make a japanese dc play american games???

If its an original then I think you might need a Mod Chip. If its a backup then try the boot disc. Don't know a lot about this though.

yes...
 

yes you can for almost all the titles, backup and original. so which are you asking? for backup, either selfboot or use utopia to boot. For original use gameshark or innovation super game converter instead.