mGBA VS Nestopia

Visual Boy Advance is actually outclassed these days, use mGBA instead. Source: 10 months ago

Which game do you want to emulate? If you're talking about fe7 (localized as just Fire Emblem in the west), you're gonna need a ROM which I can't link here but I can PM to you if you need it, and an emulator. I recommend Mgba (https://mgba.io/) for GBA games. Source: 10 months ago

Install the GBA emulator called “mGBA” on your 3DS (You can install it through Universal Updater or heres a link to it: https://mgba.io [v0.10.2] ) It should be a cia file to install through FBI. Source: 10 months ago

No, you can use mGBA for GBA games, and MelonDS for NDS games. Source: 11 months ago

Here's the thread for the Real Battle Network Gameplay patch, here's the English translation patch, and here's the emulator I recommend where you can just slot in the Navi of your choice to unlock them immediately. The ROM you'll have to scare up for yourself, but I'm sure you can handle it. Source: 12 months ago

Try to remove the emulator in Configure emulators,and import it again, it could work. You can also try different emulators like Nestopia or FCEUX (the one I am personally using). Source: about 2 years ago