I hate to be the devil's advocate, but doesn't the PotD somewhat hurt Robin's chances? SSB4 already has two gender-swapping characters as it is. I'm kind of worried to be honest.
How did the string of logic ever get to this state.
Edit - And I don't mean that as an insult. Sorry if it comes across that way.
First, we need to realize that the fact they can have different appearances is not an important part of what makes a character different. I would rank that far beneath their anatomy, fighting style, art direction, and even franchise of origin. Even if that mattered (which it doesn't), Robin will function 100% differently from the Villager and look 100% different than the Villager,
After that, I would have to remove WFT from being compare at all. The trainers, in their source material, are largely interfaces. Not characters you can play as, and most certainly not characters you customize beyond the gender.
It's not a super power, personality trait or really anything that defines Robin. I can say being customizable is integral to the Villager, and the core of Animal Crossing, but this is 100% irrelevant here.