Donut Plains

Donut Plains is a region of northwest Dinosaur Land, located to the north of Yoshi's Island and south of Vanilla Dome. The region also has passages to the Valley of Bowser (via a Warp Pipe) and Star World (via a Star Road).

Geography
Donut Plains resembles the central Mushroom Kingdom in several ways: it has similar hills to those seen in 1-1, and it has hills with eyes that resemble Grass Land. In the south part of the region, the sky is yellow; in the north, it is a more typical blue. The region itself is, true to its name, plains shaped like a donut; there's a lake in the center that it encircles. East of the lake, there are many rocky mountains, making the area hard to traverse with no notable locations within aside from a single Warp Pipe. There are very few settlements in the area; the only ones known are the Green Switch Palace, Donut Ghost House, and Donut Secret House, the latter of which is ruled by the Big Boo.

Inhabitants

 * Blurps
 * Boos
 * Cheep Cheeps
 * Eeries
 * Fuzzies
 * Jumping Piranha Plants
 * Monty Moles
 * Rip Van Fishes
 * Swoops
 * Volcano Lotuses

History
Donut Plains was invaded by Bowser during the events of Super Mario World. Morton Koopa Jr. took up residence in a castle in the northeastern part of Donut Plains, guarding the entrance to Vanilla Dome. Mario, Luigi, and Yoshi, on their quest to save Princess Peach, passed through the area and defeated Morton, freeing Donut Plains from the influence of the Koopa Troop. After finishing here, they went on to Vanilla Dome.

Later, Mario returned to this region as a part of Super Mario Kart tournament, where Mario Circuit 1, Donut Plains 1, Mario Circuit 2,  Donut Plains 2, Mario Circuit 3, Mario Circuit 4, and  Donut Plains 3 took place. These courses reappeared throughout Mario Kart: Super Circuit, Mario Kart DS, Mario Kart Wii, Mario Kart 7, Mario Kart 8 Deluxe, and Mario Kart Tour. The last of those also introduced a new course in the region, RMX Mario Circuit 1.

Locations

 * Donut Secret 1
 * North of the lake
 * Donut Ghost House
 * Top Secret Area
 * Donut Plains 1 (track)
 * Donut Plains 2 (track)
 * Donut Plains 3 (track)
 * Donut Plains 3 (level)
 * Donut Plains 4
 * #2 Morton's Castle
 * West of the lake
 * Donut Plains 2 (level)
 * Green Switch Palace
 * South of the lake
 * Donut Plains 1 (level)
 * Mario Circuit 1
 * Mario Circuit 2
 * Mario Circuit 3
 * Mario Circuit 4
 * RMX Mario Circuit 1
 * Donut Secret House