If you haven't already, download or the paid version from the Google Play Store. It is the most stable GBA emulator for Android.
Here is a helpful guide based on community "success stories" to help you get the best experience in Spanish: The "Success" Method: Using Hack ROMs If you haven't already, download or the paid
Para que el juego corra de forma "better" (mejor), ajusta estos parámetros en el emulador: If you haven't already
Personaliza la disposición de los botones en pantalla para que no obstruyan la visión del mapa. If you haven't already, download or the paid
My Boy no abre archivos .nds. Para eso necesitas Drastic.