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Room 4-SP (titled Room 3-SP in the British English version) is the special course of Jungle Rumble 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.
All four mini toys start in a row on a platform at the top left, facing away from the entrance of a cyan Split Pipe. Using Pink Blocks, they must first be brought onto a Yellow Color Switch at the bottom right. Pressing it causes a terrace of three Yellow Color Blocks at the top to turn solid. Afterwards, the toys must be guided a level upper and walk onto a blue Box Spring. The circumstances will only allow the toys to walk on the Box Spring from the left, and the player should tap on it to launch the minis to the right, onto the Yellow Color Blocks. This will bring them onto a platform and into a wall, where they change direction. Soon after falling off the same Yellow Color Blocks, the minis will land on the same Box Spring which must be used again to bounce them to the left, onto a girder with a Red Color Switch. The switch needs to be pressed in order to turn several red Polterguys arranged before the Goal Door on the right into blocks. In this instance, the minis must be led to the Yellow Color Switch at the bottom yet again to disable the Yellow Color Blocks at the top, then return to the Box Spring which the player should now use to send the minis one by one onto the Polterguys directly taking them to the Goal Door.
Mini Mario Card
The Mini Mario Card is in a space on the bottom left, under some red Polterguys. The minis should first push the Yellow Color Switch to disable the Yellow Color Blocks that prevent access to the card, then cross some spikes with Pink Blocks to reach the card. Immediately after collecting it, they will enter a Split Pipe that warps them back to their starting area.
The M-Token is atop the red Polterguys on the left. The minis must first press the Red Color Switch at the top to turn these enemies solid, enabling the toys to simply walk on them to the token.