Dolphin is the only emulator you should use for Wii games. It supports and NKIT files natively.
If you use Dolphin, the emulator features a built-in compression tool that handles file conversion seamlessly. Open and set up your game directory. Right-click the Wii game you want to compress. nintendo wii roms highly compressed
This guide explores (often found as WBFS, RVZ, or CSO files), explaining how they work, how to create them, and the best practices for safe downloading and usage in 2026. What Are Highly Compressed Wii ROMs? Dolphin is the only emulator you should use for Wii games