Please note that I won't provide direct links to ROMs or encourage piracy. However, I can suggest some general tips on where to find them:

To play a compressed ROM, you will need an emulator. The is the gold standard for both Windows, Mac, and Android.

Some emulators handle compressed formats better than raw ISOs, reducing read overhead. This is especially true for Dolphin Emulator’s built-in RVZ compression.

The request for a "highly compressed" ROM of The Legend of Zelda: Skyward Sword is technically unfeasible and legally fraught.

Once you have a legitimate, highly compressed ROM (either self-made or safely extracted), you need an emulator.