If you want to play the game, the most helpful advice is to use official channels. This guarantees you get a safe, working copy and supports the developers.
. While Archive.org serves as a vital "digital library" for human culture, the hosting of modern, commercially available software like Mario Kart 8 Deluxe mario kart 8 deluxe rom archive.org
Because the game is not "abandonware," downloading a ROM from a third-party site—even an archival one—is generally considered under current law, even if you already own a physical copy. If you want to play the game, the
Downloading copyrighted software, even from a library-like platform such as Internet Archive , carries significant risks: Copyright Status Mario Kart 8 Deluxe While Archive
If you search mario kart 8 deluxe rom archive.org directly, you will find results. However, you will rarely find a fully decrypted, ready-to-play .nsp or .xci file sitting openly. Why? Because the Nintendo legal team aggressively files DMCA takedowns.