Changes

Visual Boy Advance-M is the best emulator for the GBA. RetroArch's VBA-Next is based off an older revision of VBA-M with added speedhacks and tweaks, making it a bit less accurate in some respects, though it fixes a few games such as Advance Wars 2. Higan's GBA core is cycle-accurate, but is otherwise very much a WIP and not as compatible as either version of VBA.