The Mushroom Kingdom is one of the two places where the whole game takes place (while Bowser's Body being the second). It is divided into 14 places:
- Peach's Castle
- Dimble Wood
- Cavi Cape
- Plack Beach
- Bumpsy Plains
- Bowser Path
- Bowser's Castle
- Underground Tunnel**
- Toad Town*
- Toad Town Mall*
- Tower of Yikk
- Blubble Lake
- Proyect K**
- Peach's Castle Garden
The * means that only Mario and Luigi can access the marked area. The ** means that only Bowser can access the marked area.