Nintendo Wii Nunchuk

The Wii package includes one nunchuk, which plugs directly into the primary controller and includes a thumbstick and two more trigger buttons. But trust us: whether you're boxing in Wii Sports, fly fishing in Zelda: Twilight Princess, or beating down your friend in Super Smash Bros. Brawl, anyone with a second Wii remote will want a nunchuk to go with it.

Pictured (left): Nintendo Wii Nunchuk