Here are some troubleshooting tips to help you resolve common issues:
Wii discs contain multiple partitions. These include update partitions, channel installers, and secure data area hashes. When NKit compresses a game to its absolute minimum size, it completely removes these non-game partitions. Download Nkit 1.4 Wii Partitions BEST
The update partition takes up unnecessary space and is useless for emulation. Here are some troubleshooting tips to help you