>>30826332There are several factors for this.
First is that SM's wardrobe is severely limited. For instance, regular shoes and boots do not exist at all. Neither do long trousers, dresses, coats or long-sleeved clothes. Boys get TWO kinds of hats total... and this is only speaking in general terms.
Another factor is that clothes are oversimplified for the purpose of being easy to present them in a myriad of colors. They're just bland.
The factor where the MC comes in isn't really their age but how fucking creepy their face is. They're some ugly mofos (and for some reason the only characters unable to gesticulate in cutscenes). The other biggest factor is the pose. When it comes to the trainer passport and the dressing room they just don't know how to pose properly when compared to their Kalos counterparts. Compare and contrast with the battle poses you can change for multiplayer battles. The feel changes a lot.
So basically it's lack of variety+overfocus on summery clothes+bland designs+creepy character.
Or maybe they wanted to contrast a fashionable person from Paris to what is pretty much a Japanese tourist in Hawaii.
