Digimon world Problem

Everytime time i try to save the game it says to add a memory card. By the way i am using No$gba emulator. If i am using the wrong emulaor feel free to correct me.

Are you using no$gba 2.6 or 2.6a?Read this too:
Common Issues

i am not using no$gba 2.6a, and i figured it out thnx for telling me about it.

Always use the No$gba 2.6a.
It's a good emulator for NDS, right now. :)
Although some of the games aren't playable right now.
Try check the list on how to setup the setting for certain games. :)