Yes, you can level up online just like for the Xbox 360, ps3 and computer. I know this for Call of Duty 4 and 5 for the wii but have never played call of duty 3 or prequals so don't know about them.
no
No.
no..
no
No, you can not.
No you cant.
You can play online multiplayer in Call of Duty 3 for Wii, but you can't play multiplayer in the sense of two controllers on one Wii.
yes
Yes. I have played Call of Duty games online with a wireless connection with PS3, Wii, and Xbox 360.
do you have TO PAY TO PLAY ON-LINE ON CALL OF DUTY BLACK OPS FOR WII
Nintendo stopped their online services for the wii.
yes every cod game has online