How Can You Play Modern Warfare Relfexes for the Wii?

I mean like multiplayer! I want to play 1 on 1! I CAN'T ITS ANNOYING! So can you play 1 on 1 on the Modern Warfare Relfexes for the Wii?! Also, where do you get the cable for the wii to play online, also how much does it cost???

Suggestion:

Wii has wi-fi buddy