You'll need DSi points which you pay for at game stores, they come with a unique code which will transfer the points to your shop account.
Downloading the data itself after that does not 'cost' anything as such, you need a wireless internet connection which someone will be paying for, but downloading things over it incurs no additional cost as per normal.
No it does not
You can download games/apps for the DSi via the DSi Shop.
You can download games/apps for the DSi via the DSi Shop.
You can connect to the DSi store from the DSi's main menu, that's where you purchase and download games.
You can play ds games on the dsi and you can download games from the dsi shop channel using internet access.
At the moment, you can download applications for your DSi and DSiWare games. These can cost anything from 100 points to 1000.
You download them from the DSi shop, accessed from the DSi or DSi XL's menu bar.
The DSi Store is available on the DSi's menu, select it to purchase and download games. The download option appears once you buy.
You need a DSi or XL to do it, they can go on the DSi Store to purchase and download games.
No,it doesn't cost money to get internet into a DSi. The internet already comes on the DSi.
Yes, the DSi can connect to the DSi store, from which games can be bought and downloaded.
The DSi can access DSiware, which are specially downloadable games for the DSi.