From the Super Mario Wiki
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The level features two Mini Marios.
Both Minis begin on the top left, with the exit door on the bottom left. In order to reach it, the two Minis must fall down a level from the right side of the stage. After evading a Shy Guy, the Mini Marios will be right to the exit.
The M-Token is located at the upper level on the right, just below the Mini Mario Card. It can be collected by drawing a Red Girder slope, then removing it just as the back Mini Mario is about to reach the top.
Mini Mario Card
The Mini Mario Card is located on the upper level on the right, just above the M-Token. It can be collected by drawing a Red Girder slope straight to it.
In order to earn a trophy, the player must score 14100 points.
In Plus Mode, the Mini Mario must be guided to the exit door first, followed by the Mini Toad.
In order to earn a trophy, the player must score 13400 points.