The vanilla game’s online servers shut down years ago. The WAD scene has produced permanent patches that bake Wiimmfi (the custom online server) directly into the channel. You click the mushroom icon, and you’re racing against 11 other ghosts in real-time—no extra disc swapping or loader settings required.
By doing this, you eliminate the USB port conflict (freeing up ports for GameCube controllers or DDR mats) and reduce the risk of the infamous "Exception (DSI) occurred" error that plagues USB loaders on Wii U vWii mode. mario kart wii wad better
The USB Loader (ISO/WBFS) method is generally considered "better" by the homebrew community because it offers the speed of digital gaming without the risks of installing channels to the Wii's system memory. The vanilla game’s online servers shut down years ago