Article here This is most accurate and funny part which is totally true. 5. The R4 is for homebrew: The R4 is a perfectly legitimate tool and nobody has ever used it to completely rip off the Nintendo DS' game library. You can use it to play (legally purchased) movies or listen to (legally purchased) music on your DS. The main draw, of course, is all the homebrew that you totally use in between playing games that you own all the carts for. In fact, if you DO have any games on your R4, they are all definitely backups of games you already own. You just can't deal with the aggravation of putting all those unwieldy carts into the DS slot so it's handy to have all the legitimately acquired software in one place. It amazes you that anybody would want to use the R4 for piracy when there are so many other legal applications for it. You're not even tempted.