Although the inclusion of an SD card reader in the DSi prompted some to worry about pirating becoming simpler, Nintendo has taken a further step to stem the tide of pirated games. According to a member of Chinese gaming community Hacken.cc, the recently released DSi no longer allows DS flash cards.
Flash cards such as the R4 allow you to load software from your computer onto your DS, including both homebrew and pirated games. DS Fanboy elaborated that 10 different cards had been tested, and the DSi apparently prevents every one of these cards from booting at all, crashing the system in the process.
Of course, with the tenacity of both homebrew developers and game pirates, I’m sure someone, somewhere will figure out a workaround. It will then be Nintendo’s turn to respond again in this eternal battle.
Source : http://www.thegamereviews.com/