Kitiku Island is the setting of Brutal Mario. Mario travels across the vast land in his quest to thwart Bowser.
The island is in the form of a mountain. The bottom left consists of a grassland with a beach, as well as a small plateau. The bottom right consists of a forest, with a beach cliff. Between the grassland and forest is a bay. Inside the mountain is a cave, which can be accessed by a hidden entrance in the waterfall. Midway up the mountain there is more grasslands and some rocky areas, as well as a small lake to the right. The top of the mountain is a snowy peak, as well as where the waterfall starts. Also at the very top is the entrance to Bowser's Valley.