gba emulator help.

I need help run a gba emulator ever since I re downloaded it no games show up just a black screen and idk whats wrong if anyone will help plz post.

What emulator are you using and what games are you trying to play?

im using the visual gba and its pokemon that keeps doing it.

Take a look at this thread:
https://www.romulation.org/forum/index.php?topic=6326.0It tells you what needs to be done to Visual Boy Advance in order to run Pokemon games.