I've just got a WiiU and am going to dust off my Wii and transfer my Wii data to it.

I've connected to the new store and Nintendo network via my 3DS.

Is there an order to transfer my Wii data and log in to my existing account to prevent any data loss? Which Mii will take precedence, the Wii Mii or the 3DS Mii?

1 Answer 1


Transferring data from Wii to Wii U should be safe, since the Wii U's Wii mode is completely separate from the rest of the Wii U. However, the transfer is one way only, and all the Wii's data will be removed upon transfer. It is recommended you do not interrupt the transfer at any time, or you might end up losing your Wii's data completely.

Games you bought on Wii are not directly compatible to the Wii U, you can still play and possibly download them using Wii mode. Games that are available on both the Wii's Shop Channel and the Wii U's E-shop, can be bought on the Wii U with a price drop if you own the Wii version and have transferred that Wii's data onto your Wii U. Keep in mind, that unlike Steam, PSN/SEN, and XBLM, purchases made on Nintendo's consoles are bound to the console, which is what makes data-transfer so important, and is also the reason why the old console's data is wiped afterwards.

As for which Mii takes precedence: you decide.
When you try connecting to an existing NNID with your 3DS, your 3DS will ask you if you wish to keep your Streetpass Mii, or overwrite it with the Mii already associated to your NNID. Unfortunately, I don't know if it's true for the Wii U as well. I suspect it might be similar, though. In any case, I'd recommend creating a simple Mii as your personal Wii U Mii first, then overwriting it with the existing one.

  • Can you elaborate a bit? I just got a Wii U and would like to get the games off my old original Wii on to the Wii U, the only problem is the old Wii died of heat exhaustion. Does nintendo keep track of my purchases and allow me to download games I already bought on the Wii store, onto the Wii mode of my new Wii U? (Without having to pay again?)
    – stu
    Dec 26, 2016 at 1:07
  • @stu. You'll have to contact Nintendo support. They'll probably ask you for the serial number of your dead Wii and that of your new Wii U. Only Nintendo can perform a system transfer if your old console dies. You will still need to download all the games on your new console, though.
    – Nolonar
    Dec 26, 2016 at 14:41
  • Happy to download again, I just don't want to have to pay twice for the same games. Thanks for getting back to me.
    – stu
    Dec 27, 2016 at 15:55

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