There are plenty of places in order for one to buy a DS card. However, it is strongly recommended that one should order from the best selling website eBay.
Just enter your credit card info. There are 2 kinds of r4itt card from r4itt.net currently. The R4iTT 3D card, which support Nintendo DSi V1.4.2, DSi V1.4.1,DS and DS lite; and the R4iTT 3DS card, which support Nintendo 3DS,DSi V1.4.2, DSi V1.4.1, DS and DS lite. You can buy them from r4town.com with paypal. Freeshipping within 12 hours.
Someone can buy a R4 DS from the Deal Extreme website. The Deal Extreme website offers a large variety of R4 DS's that can be purchased for any DS system.
eBay
The memory card is built into the machine.
Easy just buy a nintendo ds game card then put it into slot 1.
Any regular SD card will do, you can get them from supermarkets or specialist camera stores.
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.
You cant, the ds system and ds card system work by saving data onto the game card itself, if it doesnt let you have more than one save file that's it you will have to suffer or buy another game
You have to buy an Action Replay card.
You can't find it free if you gonna cheat, but you need to buy ''Action Replay for DS''. You can buy it at Codejunkie. Or you can buy a flash card, and then put the game you want to have, and put cheats on it.
No, you buy the Nintendo and it comes with no chips (cards.) A fire card is also called a Fireline and are not buy-able from any store such as EB Games or a game store.
You need to buy a new micro sd card. it's very simple!