Nintendo shut down the official Wi-Fi Connection servers in 2014. However, a custom server called allows you to race online against players worldwide. Dolphin Emulator and USB Loaders have built-in "Wiimmfi patchers" that redirect your Japanese ISO to connect to these fan-made servers seamlessly. 2. CTGP Revolution (Custom Track Grand Prix)
It is illegal to download a copyrighted game you do not own. Legally, ISO files are intended for archival or backup purposes of software you have personally purchased. This guide is provided for educational purposes regarding the technical aspects of the game software. Mario Kart WII ISO -JPN-
RMCJ01 (Compared to RMCE01 for North America and RMCP01 for Europe) Nintendo shut down the official Wi-Fi Connection servers