[...] Link- GoNintendo [...]

[...] Layton and the Curious Village on the DS has only been out in North America for a day, and already downloadable content for the title is available through the DS’s Wi-Fi Connection [...]

[...] you should connect to the Nintendo WFC and download the first DLC for the game. And, according to GoNintendo, the content won’t disappear when you power down your DS. [...]