A: Your CPU is struggling with real-time decompression. Go to Dolphin > Graphics > General and set Shader Compilation Mode to Asynchronous (Uber shaders) . Then, enable Compile Shaders Before Starting .
Use WBFS (Wii Backup File System). This format "scrubs" junk data to reduce size while remaining playable on actual consoles. Fix Download Wii Games Highly Compressed
Drop a comment below (no links, please) and the community will help. A: Your CPU is struggling with real-time decompression
Your Wii or Dolphin cannot read a .7z or .rar file directly. Fix Download Wii Games Highly Compressed