3DS Compatibility for R4 / R4i Cards
Since the announcement of Nintendo’s new 3DS console, there has been a lot of talk as to whether or not R4 / r4i cards will be compatible on the 3DS. After speaking to several official manufacturers and many suppliers/shops, R4DSRevolution reports their findings here. This page is up to date as of 22/Mar/2011.
Compatibility with 3DS Console
Several manufacturers have already announced their cards will be playable on the 3DS console. These manufacturers include the R4i team, as well as Acekard, M3i Zero, EZFlash, and so on. It appears at this time that most cards will be available to play without issues.
However, note that just as with the 1.4.1 firmware update, the R4i card in particular relies on using cheap components (it is usually one of the cheapest / budget cards available on the market) and therefore will work, but only if a new R4i is bought. The technology to update the firmware of the R4i card is not available because it would drastically increase the cost of the card. Therefore, for an updatable card alternatives we could recommend include the Acekard 2i and M3i Zero at this time.
Compatibility with 3DS / 3D Games
At this time, it is important to note that all cards that say they can play on the 3DS, can indeed play – BUT only for existing DS / DS Lite / DSi games. As before, DSiWare games as well as new 3DS games cannot be played using backup cards such as the R4 SDHC v2.10T / R4i SDHC.
Therefore, we conclude that only regular games can be backed up as it currently stands, and new games in 3D cannot be backed up at this time.