Yes you only need WiFi to play online
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No, a wireless router is needed to have the internet accessible on the Wii.
You have to have your wii connected to wireless internet in you home then the wii shopping channel will load up. Its requires an internet connection
The Wii-Remote is wireless only. The wii can also support 4 gamecube controllers, wired or wireless.
No
go to wii settings, then the internet tab, from there you can set up a wireless connection