If you used (removed partitions), restoration will fail or produce an incomplete ISO that won't work on real hardware.
To understand Nkit, you must first understand the anatomy of a Wii disc. A standard Wii ISO contains two distinct sections: Download Nkit 1.4 Wii Partitions
NKit 1.4 (Nintendo Toolkit) is a specialized tool used to shrink Wii and GameCube disc images to their absolute minimum size by removing "junk" data and non-essential partitions . While the base NKit program is widely available, Wii Recovery Partitions If you used (removed partitions), restoration will fail
Dolphin does not support Nkit's "lossy" partition removal. If you remove partitions, Dolphin will crash or show a black screen. Always use lossless partition preservation if you intend to emulate. While the base NKit program is widely available,
Nkit 1.4 is a free, open-source tool designed for creating, editing, and managing Wii game partitions. It allows users to work with Wii game data, including creating and editing game partitions, extracting files, and more.
Because NKit is an open-source tool primarily hosted on GitHub, "downloading" usually involves getting the compiled release.