From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Level_B-20&oldid=2698874"
Level B-20 is the fourth course in the Bonus 3 set and the twentieth Bonus Level overall in Mario vs. Donkey Kong: Tipping Stars. It is set in Swirling Courtyard and is unlocked by earning 80 trophies.
The course is an array of platforms of various shapes and sizes. Rows of Pink Block spaces extend to platforms and can be turned solid to make a path to them. Long Spring slots and Movable Pipe outlines are positioned on the stage in different sections as well.
The Cursed Mini Mario begins marching in the bottom left corner of the stage; it first goes up a Pink Block staircase and, as it approaches a Mini Peach, launches off from a Long Spring beyond the other side of a wall. It continues going right through an opening at the bottom and jumps off another Long Spring to enter a Movable Pipe leading back to the toy's initial position.
The Mini Peaches start at different levels. They must traverse the topmost row of platforms and cross a floor of spikes with Pink Blocks in the top right, then fall through a gap, eventually picking up a pair of Hammers along the way. With them in their hands, they should seek and attack the Cursed Mini Mario to change it into a normal Mini Mario. As the Minis march in tow, they should reclaim the Hammers to destroy two walls of Rock and a Shy Guy blocking the passage to the Goal Door. The Minis do not have enough time to simply walk to the Rocks and destroy them without the Hammers wearing out after a while, which forces them to use a pair of Movable Pipes from the Hammers' location as a shortcut.
The M Coin is at the end of the row of Pink Block spaces in the top right, above a spiked floor. The player must simply guide the Minis to the coin with Pink Blocks.