There is no 300cc cup on Mario Kart Wii.
To use codes while using Wiimmfi on Mario Kart Wii, ensure that you play online.
Mario Kart Wii is from Nintendo and not Playstation so no.
No, Mario Kart 7 can only be played on the Nintendo 3DS
Yes you need the Mario Kart Wii disk to play Wi-Fi on Mario Kart Wii. It is just like playing a normal race but with other people around the world or in your Contanent.
Yes, Mario Kart Wii is playable on the Wii U. However, the Wii U gamepad and GameCube controllers cannot be used to play Mario Kart Wii on the Wii U.
yes
No
If you're talking about Mario Kart Wii, then NO
no you cannot connect with your friends if they do not have Mario kart wii
There is no possible way of playing Mario Kart on a computer!
No, you cannot