Room 1-SP (titled Room G-SP in the British English version) is the Special Level of Mini Mayhem 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.
The course is composed of three lanes consisting of girder platforms and Pink Block spaces to help the minis move across gaps or commute from one lane to another. There are also arrays of Coins positioned along the lanes. All minis start on the bottom left, with the Goal Door being on the same level; however, the door is surrounded by two Circus Kongs that initially block the way to it. The minis must use the Circus Kong on the left to jump to the upper platforms and use some Pink Blocks to cross some spikes. Heading right, they need to step on another set of Pink Blocks to reach out to a pair of Hammers. Soon after, with the Hammers in their hands, the minis will be able to stun the Circus Kong on the right side of the door and reach the exit.
Mini Mario Card
The Mini Mario Card is located in the top right. The player must first build a staircase of Pink Blocks above some spikes to help the toys reach the topmost lane, then use Pink Blocks again to make a way to the card.
The M-Token is found in the top left, opposite from the Mini Mario Card. The minis should first reach the Circus Kong on the right without picking up the Hammers. This allows them to be thrown upward on the middle lane and continue moving to the left. The player must then build a Pink Block staircase to the top lane and then put a few Pink Blocks under the M-Token to allow the toys to collect it.