Skyward Sword is unique in the Zelda timeline. It serves as the "first" story in the chronology, explaining the origins of the Master Sword, the kingdom of Hyrule, and the eternal conflict between Link, Zelda, and Demise. For years, it divided the fanbase due to its motion controls and linear structure. However, looking back at the original Wii release—specifically the NTSC-U 1.00 ISO—allows us to appreciate the game as it was originally intended, flaws and all, before later remasters on the Switch smoothed out the edges.
The Dolphin Emulator is the primary tool for running this ISO on modern PCs, allowing players to scale the resolution up to 4K and add graphical enhancements that far surpass the original Wii hardware. Achieving 100% Completion
Based on your query regarding the "paper" (Cawlin's Letter) for the Haunted Restroom side quest in The Legend of Zelda: Skyward Sword