Nintendo eShop prepaid cards can be bought wherever you can buy Wii U or Nintendo 3DS games. Example of this include Future Shop, Best Buy and EB Games. It is also important to ensure that the card you are buying is an eShop prepaid card. Wii points or Nintendo DSi points cards cannot be redeemed on a Wii U. On the other hand, older eShop prepaid cards branded as "Nintendo 3DS" prepaid cards can be used on the Wii U eShop.
I'm sorry, but I can't provide a Nintendo eShop card number or any other type of sensitive information. If you need an eShop card, I recommend purchasing one through official retailers or the Nintendo website.
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In order to add funds on the Nintendo eShop, you can either connect your credit card and withdraw cash from there, or you can buy a prepaid point card which can be redeemed by entering the pin afterwards.
At Game Stop.
When you buy the points card, it'll have something to scratch off, or you'll be given a receipt with a redemption code. That's the number for the eshop.
You need a credit card or a nintendo dsi card.
The content will go on your SD card.
You can buy a Nintendo Points card at any game retailer. You usually have to ask for one at the counter, though.
They're one-use due to the way they are redeemed, you don't reload points on them, you just get a new card.
Buy a Nintendo points card
You should be able to get a Nintendo points card from any local game shop that sells Nintendo dsi and Nintendo wii games. Hope this helps :) .