BoycottAdvance is a capable free and portable GBA Emulator that has been ported across several systems, ranging from Windows to Linux. It is able to successfully emulate commercial ROM’s along with homebrew, however don’t expect the best emulation, however performance should be fine as it was developed for much older Pentium systems.
For some time BoycottAdvance failed to emulate sound, it was until after the release of version 0.2.1 did the GBA emulator start to actually be able to support sound.
Development of BoycottAdvance has sadly come to a stop and hasn’t seen in progress for over 13 years. However it still remains a capable emulator, even if it has now been surpassed by many other emulators such as VBA-M and higan.