This page contains a collection of patches for Final Fantasy V Advance for the GBA. They are provided in UPS format; use romhacking.net's RomPatcher.js to apply these patches to the US ROM, with md5 9ed82843cc54876362be56faccb15d75. None of these patches are my work.
The Sound Restoration patch restores the music & sound effects to close facsmiles of their SNES originals, and additionally fixes some in-battle slow-down. You must use mGBA, or else supply VBA with the GBA BIOS, or you will get worse slowdown than the original.
The FF5A FFT Portraits patch replaces the game's Amano-based portraits with new ones derived from Final Fantasy Tactics.
Sound Restoration + Portraits combines the two patches above.