The Dolphin Wii has several IDs. There's a possibility that UnbanMii doesn't change them all. (Couldn't find the link to the source) Try my program: https://forums.dolphin-emu.org/Thread-unofficial-dolphin-nand-generator-released
There's also a chance, however small, that it doesn't work. One of the IDs, instead of randomizing, I let Dolphin randomize it. Dolphin makes one based on the system time, meaning it would potentially be possible to detect it, just by converting IDs to timestamps and banning anything that seems Dolphin-like. So far, I haven't been banned using this tool.
If this tool gets blocked at some point, it's not a big deal, just make a new MKWii license, use some unlock everything cheats, and regenerate the NAND using an updated version of this tool.
There's also a chance, however small, that it doesn't work. One of the IDs, instead of randomizing, I let Dolphin randomize it. Dolphin makes one based on the system time, meaning it would potentially be possible to detect it, just by converting IDs to timestamps and banning anything that seems Dolphin-like. So far, I haven't been banned using this tool.
If this tool gets blocked at some point, it's not a big deal, just make a new MKWii license, use some unlock everything cheats, and regenerate the NAND using an updated version of this tool.