LogFAQs > #968984068

The EU version of FF4 GBA has patches to change the soundtrack back to the original, and a (maybe in progress?) visual enhancement patch that restores the color aesthetics to something closely resembling the SNES version, while keeping the more complex sprites and backgrounds. I've played the latter patch, and while it has a few issues (I downloaded an early version that accidentally made child Rydia very dark skinned, lol), it's way less of an eyesore than the vanilla game and has all the bonus content. If that version had a patch to fix the weird battle lag, it would be the best version.