How to use a patch.

[WWakerFAN]

If you're using vba you actually don't need to apply the patch, just place it in the same directory of the rom and give the patch the exact same name of the rom (eg. for "Megaman.gba" you would rename the patch to "Megaman.ips" and so on and so forth). Make sure you have automatic IPS patching turned on (Options > Emulator > Automatic IPS Patching).