| Issue | Unverified ROM | Verified ROM | |-------|----------------|--------------| | Black screen on boot | Missing IOS patches | Includes correct IOS 250/249 | | No Wiimote sync | Corrupt controller mapping | Tested with original Wiimote + Nunchuk | | World 5 softlock | Broken level trigger | Full playthrough confirmed | | Save corruption | Bad SRAM handling | Clean save routine | | Trojan virus | .exe or .scr file | .wbfs or .iso only |
New Super Mario Bros. U is a Wii U title and cannot run on a regular Wii console.