Skipper had several friends in the 1960s and 1970s. You can find lots of info on these dolls on the following pages (please follow the links).
Ruth Handler, "Dream Doll - The Ruth Handler Story": "Skipper had a flat chested child's body. In fact, we used that same body mold not only for her female friend Skooter but also for her male friend Ricky. Bot of these Skipper friends, introduced in 1965, were freckle-faced and many girls considered them brother and sister or that one or the other was - or both were - the younger sibling of Midge."