How to Play NES Games on Your Nintendo 3DS (with Pictures)
Help & Support « Guides for R4 3DS™
What file type do ROMs have to be saved as to run on my R4i Gold 3DS Wood? : r/3DS
I'm thinking about using an r4 card to play ds games on my new 2ds xl. What games have issues? Also does anyone have links to good tutorials? Thanks in advance! :