The article here is to tell you how to use R4 card to install DS homebrews on 3DS and share with you some recommended homebrew apps&games. R4 card can homebrew Nintendo 3ds, but it only supports ds homebrew apps, emulators and games, if you want to put 3ds homebrew files to the 3DS, then go to this guide. R4 cards support homebrews on 3DS R4 card is compatible with DS homebrews on both 3DS and NDS handheld system. All of the following r4 3ds cards are confirmed working with the 99% Nintendo DS homebrews. They are the R4i sdhc rts 3ds, R4i gold plus 3ds, R4i gold pro, R4isdhc dual core, R4isdhc rts lite lite and R4i gold eu 3ds. In addition, they all come with a must to have homebrew app, that's the Moonshell, which is used as the most popular video&music player for Nintendo 3DS. Because the Moonshell is built-in to the 3ds r4 cards, so you are no longer to install it, just follow this instruction to use it for playing Multimedia files. Tutorial: How to