Wii Wi-Fi Connection
Super Smash Bros. Brawl allows battles to take place between distant opponents through the use of Nintendo Wi-Fi Connection. This Nintendo Wi-Fi USB Connector provides a dedicated wireless access point that plugs into the USB port on a PC (Windows XP only).
This connector does not plug into your Wii. The Nintendo Wi-Fi USB Connector is for use if you do not have access to a wireless network connection, or are unable to connect your Wii console or Nintendo DS to the internet with your existing connection.