By unnatural, or even by forced, I'm not outright suggesting that their inclusion does not make sense, but rather that there is a case where they can be argued as such. In terms of the unnatural, I mean that few of the characters are ones that I'd consider to be a first choice when thinking of not just female characters but characters in general. Of course, this is a matter of personal opinion, but the choices of Rosalina, separate transformation characters of Zero Suit Samus and Sheik; these don't strike me as clear choices for characters.
In terms of clear character choices of both male and female, my thoughts immediately turn to the lead protagonist or antagonist of a game, and the most key characters of the very series. For instance, Dixie Kong comes across as an obvious choice as a DK newcomer, a female character, and a protagonist (she was the lead of Donkey Kong Country 3 after all). So does Lip from Panel de Pon, or Bubbles from Clu Clu Land. I suppose one could also count unique move-set as something to argue for character choice but Rosalina's usage of Luma doesn't come as a natural thought (an idea that could come to mind if I focused specifically on the character, but that's when the terming of her as unnatural comes in).
The unnaturalness of Zero Suit Samus and Sheik is quite clear, although they have separate move-sets, should we really count them as 2 additional female representatives? They still are Samus and Zelda respectively, we've instead just got two of the same person. Separation of character's transformations by themselves seem bizarre (and in my personal opinion, the worst decision made to SSB since tripping) and counting these two versions of already counted characters as additions to the female count is quite odd.
By suggesting the inclusions of Wii Fit Trainer, Villager, and Robin as forced or unnatural in terms of female representation, I do not mean that the characters themselves feel forced or that they should not have the gender option, rather that it is questionable if we should outright declare them as a female or male option.
When the subject of gender characters were brought up in previous SSB games, I remember debates on whether the Pokémon should be classified as one gender or another, and whether Nana is to be accepted as counting as a female inclusion. The amount of female characters were argued as being 3, or 5, and it all get messy. In the case of Wii Fit Trainer, Villager, and Robin, should these really be counted within the same brackets as female or male characters or instead a separate category of optional?
I would not say that any of these characters were forced into the game because of them being female, at least solely. What feels forced in a way is accepting these additions purely within the female categorisation given prior conversations I've had on this subject (perhaps it's seen differently here on Smashboards), placing the gender choice characters within both sections, the separated transformations counting separately despite being the same people who are already in; it does come across as unnatural to a degree hence why I agreed. I can understand though if you see otherwise, which is why I noted that such a view can be argued against but I feel both sides make a valid point.
