The Barbie EXTRA dolls really are something extra. Extra Extra with All. I have listed them all here, but I only own about half of them. Two of the dolls were only sold in big Gift Sets with four other dolls, that I already have so buying an extra (pun intended) just to get the one hasn't been possible. One doll is sold in a furniture gift set. There are two dolls with extra outfits in Mix'n Match sets, a few Fancy sets and Fly dolls on vacation, which includes the only Ken in the series.
The boxes was redone aometime along the line and some of the dolls could be found in both box versions.