You don't need to search the shady corners of the internet for "highly compressed" files; you can safely compress your own legal backups using Dolphin. and point it to your games folder. Right-click the game you want to shrink. Select "Convert File..." Choose RVZ as the format.
If you legally own GameCube discs, dump them using a Wii or a compatible disc drive. Then convert: gamecube rom highly compressed portable
ROMs (Read-Only Memory) are digital copies of games that can be played on devices other than their original hardware. In this case, we'll be working with Gamecube ROMs, which are digital versions of Gamecube games. You don't need to search the shady corners
Often used for older Wii homebrew. It is generally less efficient than RVZ and less widely supported by modern mobile emulators. 2. How to Compress Your Library Select "Convert File