Where can I find GBA ROM files?

1. Download Visual Boy Advance from

http://emulator-zone.com/download.php/emulators/gba/vboyadvance/VisualBoyAdvance-1.8.0-beta3.zip

2. Get gba roms from http://doperoms.com

3.Open gba files with visual boy advance

4.Go to the cheats tab and enter the new cheat list

5. next you need to find GameShark codes

6. I think there are some at the official site http://www.gameshark.com