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Room 2-SP+ (titled Room 1-SP+ in the British English version) is the special Plus Mode course of Sandstone Stroll in Mario vs. Donkey Kong: Minis March Again!. It is unlocked once all lettered Mini Mario Cards are collected on this floor.
The course features three mini toys.
Two minis start in the bottom left, with the other mini starting on a platform right above them. The Goal Door is located in the top left corner of the stage, behind a closed yellow gate which must be opened by pressing a Yellow Color Switch.
The top mini toy will bounce off a Blue Spring immediately after activation, landing on a platform above. In this area, on the left, there are two Yellow Color Switches; they can be used to open the yellow gate that blocks access to the Goal Door. In the same area, a few springs and Pink Blocks can be used to reach either of the switches. After the yellow gate is opened, the minis must be assembled to reach the goal close together.
Before entering the Goal Door, however, the minis may explore the rest of the course to collect Coins spread around, using Pink Blocks, Springs, and Color Switches to enable and disable various gates and bridges.
Mini Mario Card
The Mini Mario Card is between a Yellow Spring and a closed blue gate in the center of the course. If a mini approaches the card from the left, they will bounce off the Yellow Spring and miss the card. The minis must first seek one of the course's Blue Color Switches and press it to open the blue gate to the right of the Mini Mario Card, then go under the gate from the right to collect the item.