Mushroom World

Mushroom World (Japanese: きのこのせかい), also known as Mario World in Super Mario RPG (Japanese: マリオワールド), refers to Mushroom Kingdom and the accompanying lands including from Super Mario Bros. 3. Mushroom Kingdom serves as a gateway to these lands. In Super Mario Bros. 3, Bowser and the Koopalings have taken over these lands. They also transform the kings of each land to various creatures, but Mario and Luigi eventually defeat them and restore the lands and kings to normal.

In Paper Mario, "Mushroom World" also refers to the Mushroom Kingdom in the Japanese script of Paper Mario. In Paper Mario, Mushroom World is synonymous to Mushroom Kingdom. In the game, Mario travels through this world to recover the Star Spirits so he can eventually face Bowser and rescue Princess Peach. Along the way, he meets several partners that aid him on his journey throughout the Mushroom World.

Lands
What are also included, but not shown in the Mushroom World are Warp Zone and World-e.