Room 3-SP (titled Room 2-SP in the British English version) is the Special Level of Magnet Mania 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 four mini toys.
One pair of minis starts in the bottom left, inside a recess, facing a Magnet that runs up the left side of the level. The other pair of minis starts to the right, across a pit of spikes, facing the same direction. The player should mainly use Pink Blocks to guide the toys to the Goal Door on the right side of the stage. However, the minis can also utilise Magnets and Split Pipes to explore the level in its entirety and collect the bonuses necessary for a high score.
Mini Mario Card
The Mini Mario Card is on a platform at the top of the course, guarded by a Capture Kong. The minis should simply take a pathway up there by going up a Magnet and entering a cyan Split Pipe. They will eventually pick up one pair of Hammers placed on either side of the Capture Kong and run into the robot to attack and stun it, gaining access to the card.
The M-Token is right beside the pair of minis in the middle. However, they are facing away from it. To obtain it, either the minis on the left should walk up the magnet in front of them and reach a Split Pipe at the top that will warp them to the token, or the player should place Pink Blocks in front of the minis close to their initial positions to change their direction and help them head to the token.