Downloading pre-patched randomizer ROMs falls into the same legal grey area as downloading any copyrighted ROM. The safest way to enjoy a pre-patched hack is to apply the hack's patch file (usually an .ips or .ups file) to your own legally obtained ROM backup using a patching program, rather than downloading a complete pre-patched ROM.
Downloading pre-patched randomizer ROMs falls into the same legal grey area as downloading any copyrighted ROM. The safest way to enjoy a pre-patched hack is to apply the hack's patch file (usually an .ips or .ups file) to your own legally obtained ROM backup using a patching program, rather than downloading a complete pre-patched ROM.