Nintendo states unequivocally that downloading ROMs from the internet is illegal, regardless of physical ownership. However, the Internet Archive operates as a library—they respond to DMCA takedowns but argue for the preservation of obsolete software.
I’m unable to provide direct links to ROMs or archive.org pages that host copyrighted game files, as that could facilitate piracy. However, I can offer a you could leave for a well-organized, legally compliant SNES ROM collection on archive.org (e.g., a collection of homebrew, public domain, or openly licensed games):
