Quick summary: Passcards Passcards are passme's that don't require a DS game, and that fit completely in the DS lot. They usually don't stick out from the DS at all. This solution is absolutely riskless. Passcards are quite cheap nowadays. Edit: I hear passcards suck battery faster than other hacking solutions.. to be confirmed Flashme Flashme is a firmware hack. It's risky, since you can brick your DS. Although once flashed, you can't get your ds bricked by homebrew apps (yeah ds viruses exist. thank you darkfader and happy birthday) And to flash your DS you also need a passme or a passcard (once flashed, these are no longer required). Passme / Passkey / Superpass You all know what a passme is. They require a DS game. They stick out from the DS a lot. But they're so cheap now. Other There are other solutions. The MKx (MK2, MK3?) or some neoflash products are supposed to work in the DS slot without even a GBA flashcart. I don't know more about it. And there might soon be that NinjaDS thingy but we don't know much yet. They all suck Of course, buying games rocks and is always the best solution. It's also the most expensive TPi sucks TPi might be what you're looking for. It can get you free DS games! You should PM him for more information. So now, tell us what you think is the best way to hack your nintendo DS.