Steps:
======

1. Prepare both nds and gba games. And make sure these 2 games are "nds-gba linkage" supported.
2. Copy the NDS game into the "nds" folder and copy the GBA game into the "gba" folder.
3. Make sure the "gba expansion pack" is inserted.
4. Power on NDS, enter into the "GBA game menu", select the GBA game and press "Y" to confirm. (It will load the game data into memory.)
5. Then, go back to the main menu, enter into the "NDS game menu", select the NDS game and run it as usual. The "nds-gba linkage" function should be activated.