Many sites offering "highly compressed" downloads (like 100MB versions of 4GB games) often provide corrupted files or malware. Instead, the safest and most functional method is to compress your own legally obtained game files using Dolphin's built-in tools. Key Features of Wii Game Compression for Android
How to Get Highly Compressed Wii Games for Android (Save Space!) Wii Games Highly Compressed Android
The "highly compressed" versions are preserved games the way a mummy is a preserved human. You get the skeleton, but the soul is gone. Wii Games Highly Compressed Android
These are modern compression formats designed specifically for the Dolphin Emulator. They can compress a Wii game by roughly 50% without losing any quality. Wii Games Highly Compressed Android