Zipper is one of Waluigi's three Karts in Mario Kart DS. The other two are the Standard WL and Gold Mantis. It resembles a three-wheeled chopper like motorcycle. It has average stats, all of which, except for weight and items, are slightly lower than his other karts.
Notably, this is the first bike in the Mario Kart series, but does not have the same abilities as the bikes used in Mario Kart Wii.