@SuperFireFry The Wii has a very old Wi-Fi implementation. It only supports 802.11b/g and although I think it supports WPA2 security, those who tried (years ago) were not able to get it to connect to an Ignite/Xfinity Gateway, despite trying every trick in the book. If I remember correctly, one person's "solution" was to dig up an old router (from the same technology era as the Wii) and use that to provide it with Wi-Fi connectivity.
@SuperFireFry FYI, found this thread from several years ago: https://communityforums.rogers.com/t5/Internet/Ignite-WiFi-Modem-Connecting-a-802-11-b-g-Device/m-p/...
