There were three waves of Moxie Teenz before they were cancelled. The first two featured wigs on all the dolls, the third/final wave (wearing formal wear, like a prom dress) switched to rooted hair.
I don't know if the box has been scrubbed of all references to wig play. If it still mentions the wig then this might be a one-time consumer switcheroo: someone could've bought two dolls and swapped their outfits and returned the doll with rooted hair in the first wave outfit. (Seems far-fetched but I recall seeing some collectors complain about the rooted hair, so if they wanted the prom dress on a doll with wigged hair then this is how they'd do it without paying for two dolls.)
It’s also possible MGA is unloading leftover third wave dolls to outlet stores using whatever outfits they still have. If you see a new crop of these dolls in discount stores let us know if the box mentions the wig in the contents list or box graphics.
Unfortunately I don't know momdusa so I can't ask her if the doll was secured in the box like it came from the factory, or about the box. If I can figure out a way to contact her via Tumbler I will. eta: I found her ask box so I sent a message, will let you know if she replies.
) where Mattel used to mix and match bits to make whole dolls - they were concentrating on the early-mid 70s. But it does sort-of make sense if your doll is not aimed at collectors to use what you have to hand to make the dolls if you're coming to the end of a run/line/company (only sort-of because as a child I would very definitely have noticed that doll a had the same arms, for example, as doll b whereas doll c didn't)
