The RVZ file format stands for "Dolphin Emulator Compressed ROM Image" and is a specialized, proprietary file type primarily utilized by the Dolphin Emulator. Dolphin is a renowned free and open-source emulator designed to run Nintendo GameCube and Wii video games on various desktop operating systems. RVZ files are created by Dolphin to store game data in a highly compressed state, offering a significant reduction in file size compared to their original uncompressed counterparts, such as GameCube ISOs or Wii WBFS/ISO files. This compression is typically achieved using the Zstandard (zstd) algorithm, which is known for its excellent balance between high compression ratios and fast decompression speeds, ensuring that gameplay performance is not adversely affected. Beyond just compression, RVZ files are often optimized specifically for the Dolphin environment, potentially including metadata or structural enhancements that can improve game loading times and the overall emulation experience. They serve as a crucial space-saving solution for users managing extensive libraries of GameCube and Wii games, providing a more efficient way to store and access these classic titles. While they are a compressed form of game data, they are distinct from general-purpose archive formats like ZIP, being tailored for the specific needs of game emulation within Dolphin.