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Room B-2 is the second course of the Basement in Mario vs. Donkey Kong: Minis March Again!. It is unlocked by earning 50 bronze stars or better from previous levels. The theme of this course contains arranged samples from the soundtrack of the Plus Mode version of Sandstone Stroll and the first track of Spooky House from Mario vs. Donkey Kong.
The course features two mini toys.
The two minis start on different sides at the bottom of the level. The Goal Door is at the top, to the right. Using Pink Blocks, the player has to help the minis ascend to the goal while protecting them from enemies that shoot projectiles from either side of the course. There are two consecutive portions, one with Piranha Plants that pass fireballs bewteen them, and another with Snifits that fire bullets.
Mini Mario Card
The Mini Mario Card is at the top of the level in the middle. Once the minis reach the section with Snifits, the player must guide them from right to the top left, and from there to the Mini Mario Card to collect it.