Emulators like Dolphin (and its Android port, Dolphin MMJ or Official) do not need ISO files. They use RVZ (Dolphin’s native format) or WBFS (Wii Backup File System).
So when a site advertises "High Compression," they are usually just selling you a standard RVZ file. But the truly "highly compressed" files (sub-500MB) go further. Wii Games Highly Compressed Android
Wii games were built for motion controls. Emulators like Dolphin (and its Android port, Dolphin
Instead of searching for sketchy "highly compressed" zip files, you should look for .RVZ or .GCZ formats. So when a site advertises "High Compression," they
These are modern compression formats designed specifically for the Dolphin Emulator. They can compress a Wii game by roughly 50% without losing any quality.
Result: You save space, the game is 100% intact, and it’s safe to run.
A standard Wii game disc holds roughly 4.7 GB (or 8.5 GB for dual-layer). While Wii games contain "junk data" (padding data used to fill the disc), compressing a game to sizes like 100MB or 200MB usually results in: