to use the r4 card, you also need a MicroSD card, which is used for game and r4 kernel loading.
1. download the latest r4 kernel from official website, it is a zipped patch.
2. Unzip the patch, you can get several files.
3. Copy all files to the root directory of the MicroSD card.
4. Download some games, unzip it, and put them to the root directory of the MicroSD card.
Insert the MicroSD card into the r4 card, and put r4 card into the console, then you can start to play games.
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No, the R4 for the DS will not work on the DSi
Not natively, but you can get a flash card such as the R4 that will let you. Google R4 DS
An R4 is basically a mod chip for the Nintendo DS console. You can download games from the internet and put them on your R4 card and play the games on your Nintendo DS.
Only if you buy a R4i DS.If you have DSi Firmaware 1.4 , you will need to make sure the box says "v1.4!" Original R4 DS card can't work on DSi. There are many r4 dsi card in the world. which can run on Nintendo DSiXL, DSiLL, DSi, DS and DS lite.
The cheapest i have seen was for £5.42/$9.50 (not including P&P or MicroSD Card) There are too many r4 ds card in the market currently. The cheapest r4 ds card cost about 5EUR. But it only support DS and DS lite. The famous card is r4i sdhc 3ds. It support Nintendo 3DS,DSi,DS. So, I suggest you to buy a r4i sdhc 3ds card.