RadicalRed_v4.0.ups (PokeCommunity thread – always the safest source)
Technically, you don't download a pre-patched game file. Instead, you create it yourself to ensure it's authentic and safe. download pokemon radical red v40 upd
Disclaimer: This article is for educational purposes. The author does not condone piracy. You must own a legitimate copy of Pokémon FireRed to patch this ROM hack. RadicalRed_v4