From the Super Mario Wiki
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The level features two Mini Marios.
The Mini Marios begin on a platform on the upper level on the left, with the exit door on the bottom left. In order to reach it, the Mini Marios must collect enough Conveyor Pickups to reach the slope leading to the exit.
Mini Mario Card
The Mini Mario Card is located on the lower level, to the left of an alcove. The Mini Marios must be led to it by collecting at least three Conveyor Pickups and entering the alcove, following a left-facing Purple Conveyor.
In order to earn a trophy, the player must score 14600 points.
In order to earn a trophy, the player must score 14100 points.