From WikiBrite: The Rainbow Brite WIki
Murky Dismal and Lurky travel about Rainbow Land in their strange vehicle they call the
Grunge Buggy. It is a broken down beach buggy with a dustbin tied to the side for Murky to ride in while Lurky drives! Fortunately for Rainbow Brite and her friends, it is always breaking down just when the villainous pair are almost winning.