M3 DS Real is a cheating and homebrew cartridge for Nintendo DS. The cartridge allows you to customize the way you play Nintendo DS games with cheats and alteration codes. You also can adapt the cartridge to function as a GBA (Game Boy Advance) emulator. By adding a GBA Ram Pack device, you can use M3 DS Real to run homebrew ROM files originally designed for the GBA on your Nintendo DS.
Insert the SD card that you use with M3 DS Real into your SD card reader and connect the reader to your computer's USB slot.
Copy your GBA ROMs to the "NDS" folder of your SD card. If you do not have any ROM files for GBA, a selection of homebrew GBA ROMs can be found in the Resources section.
Eject and remove your SD card. Place your SD card in the top of the M3 DS Real cartridge. Insert this cartridge into Slot 1 (the DS game slot) of your Nintendo DS.
Insert the GBA Ram Pack into Slot 2 (the GBA game slot) of your Nintendo DS and turn the system on to launch the M3 DS menu.
Use your stylus or D-pad to select the "GBA" icon from the M3 DS menu. Choose the GBA game you wish to play from the system's menu.