The forest. This forest has mountains, lakes, rivers, and trees. Your pokemon can jump on trees and hide in the water. Since this forest is so big as you can see in the picture. Pokemon can play Hide and Go Seek meaning they can attack from anywhere at anytime and if they hide it is so big it will take a long time to find them. Your pokemon will be able to get in from 3 openings. Middle area(water area), side area(tree area), or top area(mountain area).