This area is a small forest path, with lots of flowers shaped like Kartana. You will find some humans, native to this world. One will say you can capture or defeat Kartana, the other two you'll have to battle, with both trainers having Kartana. At the end, you'll find another Kartana staring at a rock.

Non-Alolan Evolution
If you evolve your Pikachu, Exeggcute or Cubone here, they will evolve into the Kantonian forms