Instructions
Connect your system to a Wi-Fi connection if you have not already done so. Click on the "System Settings" option from the main menu and select the Wi-Fi settings to automatically detect a Wi-Fi signal.
Click on the icon for the DSi Ware store from the main menu to connect.
Purchase DSi Points using a credit or debit card by typing the number in directly from your system. You can also purchase pre-paid DSi Points cards at your local game retailer.
Browse the DSi Shop for a title you would like to purchase.
Click on the game to purchase it using your DSi Points. The game will automatically download to your system's internal hard drive or external flash drive depending on which location you select.