From the Super Mario Wiki
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The level features six Mini Marios, though not necessarily in the same starting positions.
The Mini Marios all begin in groups of two at the bottom left, top left, and very center, respectively, with the exit door at the bottom right. In order to reach it, they must simply be guided via a series of Red Girders, Girder Pickups, and Warp Pipes to it.
The M-Token is located near the top right, at the bottom of a slope and near some Crumble Blocks. To collect it, a group of Mini Marios must enter the azure Warp Pipe from the bottom and slide down to it.
Mini Mario Card
The Mini Mario Card is located near the bottom left, just above the bottom left group of Mini Marios. There are a multitude of ways to reach it, such as using a Red Girder platform upon exiting the bottom yellow Warp Pipe or by sliding down the center slope and drawing a Red Girder slope to it.
In order to earn a trophy, the player must score 13700 points.
In order to earn a trophy, the player must score 11700 points.