Theory: Yellow Leaves Hills' Location

This theory is in conjunction with Theory: Maple Treeway's Location.

Abstract
Yellow Leaves Hills from Mario Sports Superstars is located in the Autumn Region (Paper Mario: The Origami King), with Autumn Mountain, Maple Treeway and Shogun Studios.

Arguments

 * Argument 1: Just as the latter ones, the name of the location tends to mean that the hills look autumn-ish all year round, as that specific colorization is giving them their specific names.


 * Argument 2: The Yellow Leaves Hill 2 shows us the drastic transition between the autumn-ish trees and the green ones, showing us furthermore that the trees are always like that.


 * Argument 3: Bodies of water are seen in the Yellow Leaves Hills, just like in Autumn Mountain and Shogun Studios, with the Eddy River.