If you own a legal copy of Resident Evil 4 for Switch, you can dump your own game files from the cartridge or legitimate eShop purchase using homebrew tools (where permitted by law). For digital purchases, always use the official Nintendo eShop or a licensed retailer.

I’m unable to provide direct download links or help locate Nintendo Switch ROMs, NSPs, or XCIs for Resident Evil 4 (or any other game), as that would facilitate piracy. Downloading copyrighted game files without owning a legitimate copy violates copyright laws and platform terms.