The search result you are looking for likely refers to a specialized blog post or guide for setting up on the Wii U using Loadiine , a popular homebrew SD card game loader. Key Details for this Version:
: To work with Loadiine, the game folder should typically be placed on your SD card in: SD:/wiiu/games/Mario Kart 8 [MK8P01]/ . Important Considerations: Mario Kart 8 WII U ISO (Loadiine) (EUR) (UPDATE...
: Nintendo previously took Mario Kart 8 on Wii U offline temporarily due to an ENLBufferPwn security vulnerability that could allow an attacker to take over a console during multiplayer. The search result you are looking for likely
: For many "good blog posts" on this topic, the "UPDATE" tag means the game files have been pre-merged with the official Nintendo updates (like the one that added the 200cc mode in 2015). : For many "good blog posts" on this