World 0 (Mario Party: Star Rush)
From the Super Mario Wiki
World 0 is the first set of boards in the Toad Scramble mode of Mario Party: Star Rush. They are unlocked by default and include tutorial messages to introduce the game mechanics of Toad Scramble. World 0 features a cliffside grassland theme.
These boards are designed as an intro to Toad Scramble, and as such have the following features distinct from other worlds: