Wii U Tranfer from Hacked Wii

first, check that you got bootmii as boot2. that is the optimal setup as you can backup and restore the NAND even after a full brick.
you can try restoring the NAND with a bootmii IOS setup but I do not know how well it works or how safe it is.

one precaution to take is to move the shop channel to the last page of the Wii Menu so after the transfer, you do not launch it. If it's launched after the transfer, it will remove any games from the Wii that were transferred to the Wii U.
this happened to me and I had to restore my NAND backup again to restore the games.

------ I did this post NAND backup and transfer
since I had no use for the shop channel as it removes the games, I actually uninstalled the shop channel via Anytitle Deleter so there would be no chance in the future of me accidentally clicking on it. if you are not comfortable with doing this, just move the shop channel to the last page.

 

I did this and by the time it said the copy was done and i knew the next part was that it would erase all my saves and games from the console i unplugged it (yes i know) and then i did my copy successfully to the WiiU vWii and i still have everything on my Wii including saves and all working fine with no pikmin harmed in the process...

 

yes iknow ijust saw that the backup was already on my sd card and i really didnt care if i bricked my wii... but it worked just do it after copy is done

 

I used a different SD card for the system transfer but yes that's the gist of it. No worries about restoring NAND as long as you have BootMii boot2, as boot2 will not be touched by the NAND restore. The easiest way to check is to move the bootmii folder off the SD card if there is one, and see if the drive LED flashes twice on boot, signifying a BootMii install.

However one very important thing to note: The Wii U failed to transfer a TON of my saves. That NAND backup saved my ass. If you like, you could batch backup every save file from your Wii, and then batch restore onto your Wii U afterwards just to make sure everything's there (or keep the save backup handy on your SD in case you ever need any of the saves, which is what I did as it was already too late to restore everything in fear of overwriting the progress I've made since)

This might've been because they had the nocopy flag on them, or it might be for an entirely different reason, but whatever the reason is, you can't trust saves that have been backed up from the Wii Settings on your Wii, as the Priiloader "Remove NoCopy Flag" patch won't do you any good when you try to restore the saves on your Wii U, so Savegame Manager GX is recommended.

 

Jailbroken, lol.
The Lego games tend to be cheap both new and used so you can probably pick one up for cheap. You can still do the system transfer to get all your Miis and other stuff over, just have a Savegame Manager GX backup handy in case there are save files that aren't copied over.

 

Almost forgot about Savegame Manager GX, because I forgot my SSBB, etc saves are on my Wii U and not my Wii anymore

Edit: Maybe they're still on the Wii, I don't think those transfer over.

 

Yeah SSBB was one of the games that the save didn't transfer over for for me. I'm not sure why though. It's supposed to transfer everything.