Yes, you have to download it from the DSi shop.
yes
NO only on a dsi aki.
You can't download a Flash Player to the DSi.
You can't get music on your DS, but you can on a DSi
No, it won't be available from the DSi store, you'll have to get the cartridge version instead.
You need a Japanese dsi and download flipnotes onto it. Then you send it to a north American dsi.
Yes, to play DSi ROMs on a DSi using a DSi download chip, you need to place the ROM files onto the chip. The chip acts as a flash cartridge that can load and run the ROMs on the DSi. Make sure to follow the specific instructions for your download chip model to ensure compatibility and proper installation.
you have to have wi-fi. i think they have wi-fi at mcdonalds.
If you download old games onto the dsi. Yes it can.
You'd need a DSi. They have an icon on their menu to let them connect to the DSi Store, where games can be bought and downloaded.
You can't actually "add" it, you'll need to buy the card from a retailer, or use a DSi flashcart to download and play on your DSi.