You will need a utility like 7-Zip or WinRAR to open the .rar file.
The "Loadiine" format is largely outdated for actual console hardware because of slow loading speeds from SD cards. Most modern users prefer WUP (Installable) files for better performance. NSMB-U-USA-LOADIINE-ZIPERTO.rar
The extracted game is approximately 2GB to 2.5GB . It must be placed in a specific directory on your SD card, usually wiiu/games/[Game Name] [GameID]/ . Usage Warnings & Best Practices You will need a utility like 7-Zip or WinRAR to open the