If you are looking for Mario Kart Wii for use with the Dolphin Emulator or a modded Wii, you don't need a shady "highly compressed" zip file. Instead, you should look for or WBFS files .
If you are playing on a potato PC or a cheap handheld, accept the degraded 150 MB version for what it is: a sketch of a masterpiece. But if you own a Wii or a capable PC, do not chase the blue shell of ultra-compression. Download the full ISO, scrub it safely to RVZ, and experience Mushroom Kingdom as Koji Kondo’s orchestra intended—rich, vibrant, and gloriously bloated. Mario Kart Wii Highly Compressed
: 36 vehicles (18 karts and 18 bikes) divided by weight class. Mario Kart Wii Highly Compressed: A Guide to
This is the most common issue. Hackers often disguise trojans, keyloggers, or ransomware as popular game files. Because the file size is small, users download it quickly and run it without scanning. If you see a "Mario Kart Wii" file that is only a few megabytes, there is a very high probability it is a fake file containing malware. For Steam Deck users: A 700MB WBFS file