If you are looking for a ROM or official copy, it is only available on these systems: Nintendo Wii (2011) : The original release requiring Wii MotionPlus. Wii U eShop (2016) : A digital re-release for the Wii U. Nintendo Switch (2021) Skyward Sword HD
It is generally only legal to create a ROM/ISO from a disc you physically own for personal use. The Legend Of Zelda Skyward Sword Gamecube Rom
But that GameCube disc? It never left the clouds. If you are looking for a ROM or
was the first 3D Zelda title built from the ground up specifically for the Wii's hardware. Zelda Wiki The Legend Of Zelda Skyward Sword Gamecube Rom