Search for "New Super Mario Bros 2 manual archive.org." You will find official Nintendo Power strategy guides, PDFs of the quick-start guide, and the full 3DS eShop manual. These are publicly preserved with fewer legal hurdles because they are promotional materials.
Yet, the New Super Mario Bros. 2 case complicates this narrative. Because the game’s DLC is no longer for sale, and the primary means of purchasing the base game new has evaporated, the economic harm is negligible. What remains is a conflict between two goods: the right of a corporation to control its intellectual property and the public interest in accessing and preserving its cultural history. The Internet Archive, operating under a broad mission of “universal access to all knowledge,” has implicitly chosen the latter. In doing so, it has turned a lighthearted game about collecting coins into a battleground over who decides what digital culture is worth saving. new super mario bros 2 internet archive
Full text of "Super Mario Bros 2 (NES) - Manual Scans (600DPI)" Search for "New Super Mario Bros 2 manual archive