Yoshi in his green Wild Wing
The Wild Wing is a Medium weight Kart available from the start in Mario Kart Wii. It has great Speed, Weight, Drift, and Mini-Turbo. However, it has poor Acceleration, Handling, and Off-Road. It's one of the fastest Medium sized vehicles, but a few unlockable karts top its speed...
It's shaped like a race car, with an aerodynamic figure and spoiler. Depending on who's driving the Wild Wing, it can be a variety of colors.