After a few weeks the Nintendo DS was out, I found someone that was willing to ship me one at a nice price from USA to NL. One thing was on my mind... to hack it. I had looked at inside pictures of the cartridge and DS. I guessed the pinout rather nicely. Others started to capture the traffic of the cartridge. We then saw the header data and encrypted data. We somehow knew it was encrypted before we started looking, but the "RSA" on the back does not apply to the cartridge.