Mario Kart Double Dash Highly Compressed [patched] -

This is the gold standard for GameCube games. The format was created by the developers of the Dolphin emulator themselves. It is a highly specialized, lossless compression format that is approximately two times smaller than other formats. While an ISO file takes up about 1.3 GB, an RVZ file of the same game can be around 300-400 MB.

When looking for in a "highly compressed" format, you are likely encountering files aimed at minimizing storage for use with emulators like Dolphin . Understanding Compression Formats Mario Kart Double Dash Highly Compressed

"Mario Kart: Double Dash!!" is a racing game developed by Nintendo for the Nintendo GameCube. It was released in 2003 and is the fourth main installment in the Mario Kart series. The game is known for its innovative gameplay mechanics, colorful graphics, and extensive character roster. This is the gold standard for GameCube games

: Tools can identify and remove this filler data without affecting gameplay. While an ISO file takes up about 1

However, downloading a pre-compressed file from a website is technically copyright infringement (Nintendo is famously litigious). That said, if you own the original physical disc, most emulation enthusiasts consider downloading a backup "acceptable," though not legally defensible.