no it can't
the wii isn't built like a computer, i just surfs the web but it doesn't keep documents or programs like computers do, also, it doesn't get e-mail
you can send messages on you wii to other e-mail addresses, but you can't get viruses from them.
someone making a virus that works on a Nintendo wii is very very very very, very unlikely, so don't worry about it, and happy Surfing :)
extra info : you can only receive wiimails from people you have registered/approved, so its very unlikely, infact almost impossible for you to get a virus.
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The Nintendo Wii was made by Nintendo.
The Wii came from Nintendo, just like Nintendo DS's or Nintendo DSi's.
The Nintendo Wii was released on November 19, 2006.
The Nintendo Wii was invented in Japan.
Nintendo makes the Wii and DS. No offence, but it does say on the product and packaging box Nintendo Wii and Nintendo DS.