If you don't want five versions of Super Mario World (USA, Japan, Europe, etc.), look for 1G1R sets. These are curated to provide only the "best" version of each game, typically prioritizing the USA release, then Europe, and so on.
Ensure the set uses standard formats like .smc or .sfc . Most modern emulators like RetroArch can even read these directly from .zip or .7z files to save space. snes full rom set archiveorg better
The Internet Archive has become the premier repository for retro gaming due to its commitment to digital preservation. Unlike many shady ROM sites, Archive.org is a non-profit library that hosts verified sets, often scanned via the VirusTotal API to ensure safety. The Best SNES Full ROM Sets on Archive.org If you don't want five versions of Super