1. TecXero
    According to: http://emulation-general.wikia.com/wiki/Emulators_on_PSP

    TempGBA4PSP is the most recent GBA emulator for the PSP, and has superior compatibility with most problematic games (Golden Sun, for example). (This was found at http://www1.axfc.net/uploader/so/3063963 )

    This includes Normmatt's opensource BIOS and the updated Game Config.