First off you need to make sure you have these items required to play online:
***Wii + Internet will only need to be purchased once to play any online compatible games***
Wii + Internet costs $5 which is 500 Wii Points and can be purchased from your Wii system if you are connected to the Internet.
Next you will obviously need Call of Duty: Black Ops. Steps to play Black Ops Online:
There You Have It. I Hope This Answer Helps Anybody In Need.
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Not with one system.
It only has online co-op.
google: black ops wii game id, then watch the first video
The Wii cannot support multiple controllers for Black Ops.
i dont think u can, if you dont like the language on black ops, dont play any call of duty. yes you can .