DSi - need help

Being new to this I admit I know little on the subject, so thought I would ask as I haven't been able to find the answer.Here we go.....my kids got DSi's for Christmas and a friend recommended I join this site. Do I download to a SD card (what is the size requirement for this console) or do I need a R4i card and mini SD card (also what memory size).Just need help to get started, because I don't know what will work and therefore do not know what to buy!Any help would be much appreciated.Thanks

Get the Acekard 2i for your flashcart choice, you'll run into less problems with compatibility with games etc. The capacity of the MicroSD (the storage) is up to you.

Thanks Anandjones, is that the same for all countries. I am in Australia.

Region of games does not matter if that's what you're referring to.