Room 4-2+ (titled Room 3-2+ in the British English version) is the second Plus Mode course of Jungle Rumble in Mario vs. Donkey Kong: Minis March Again!. It is the first course in the game to feature blue Polterguys.
The course features three mini toys.
Two minis start at the top right, facing away from the entrance in a Split Pipe, while the third mini starts a few levels lower to the left. The Goal Door is located in an alcove under the third mini's starting position, with three active blue Polterguys leading to it in a staircase formation. The minis should first be guided with Pink Blocks to a Blue Color Switch at the bottom of the stage, which, when pressed, turns the blue Polterguys leading to the goal into harmless blocks. The toys should then be brought to the upper levels and use these blue Polterguys to reach the Goal Door.
Mini Mario Card
The Mini Mario Card is above a bed of active yellow Polterguys in the bottom right corner of the stage. The Polterguys can be turned harmless by pressing a Yellow Color Switch located at the top right, accessible through Pink Blocks. The minis can then go to the bottom right and collect the card while safely treading on the Polterguys.