Do not take his advice. Even though the R4 is the most common flash-cart it´s kind of outdated and it´s users are usually at the end of the line when it comes to updates. Typically recommended carts are the CycloDS and AceCard stuff, they seem very sturdy built and reliable, great support too. I´m on m3real for my part, and that one is rather flimsy and the eject of the microSD broke down on me about a year after purchase, so I had to open it up and fix it, allthough support with new firmwares and compability is really good and it´s quite cheap.
And another word in advice: go for a GBA-Extension! That enables you to run GBA-games in the DS´s original GBA-mode, even though there might be a GBA-emulator out there (which I don´t know and don´t care), it´s much more conveniant. These slot2-expansions should nowadays be some 3in1-solution containing a rumble, GBA-functionality and extra memory for programs like the Opera-Browser or homebrew ports like Quake2.

You should be able to find a decent bundle containing slot1-cart, 3in1 slot-2 expansion and microSD somewhere on the net. Enjoy!!!

This post has been edited by Guy.brush, Thu, November 12th, 2009 at 03:57