The ISO file contains the complete game data required to run the title on original hardware or emulators. How to play Mario Kart Wii online on PC in 2025[NO NAND]
If you see mods that add 200cc, mirror tracks, or 64-player tournaments, they are almost exclusively patched for RMCE01 . Patching a PAL ISO to run these mods requires converting the main.dol, which often breaks BYAML node reading for item wheels. Mario Kart WII ISO -USA-