Most USB loaders (like USB Loader GX or WiiFlow) do support native NKit files. You need to convert back to ISO. Here is how to rebuild the partitions:
As of 2025, the Dolphin Emulator has largely moved to the , which is more efficient and supports better compression than Nkit. However, many users still prefer Nkit 1.4 for: Download Nkit 1.4 Wii Partitions
If you have a game in .nkit.iso or .nkit.gcz format and want to restore it to a full, standard ISO for use with hardware like a Wii USB Loader, you must provide the software with these missing partitions. Understanding NKit 1.4 Wii Partitions Most USB loaders (like USB Loader GX or