Level 5-3 (Mario vs. Donkey Kong: Tipping Stars)
From the Super Mario Wiki
The Minis start in different locations. Using Blue Lifts and Long Springs, they have to climb a series of platforms and reach the Goal Door high up in the level. However, before doing so, they must collect a Large Lift Pickup at the bottom of the stage, guarded by a Pokey which has to be defeated with a pair of Hammers nearby. The Pickup grants five additional Blue Lift pieces that are necessary to connect two distant Blue Lift Rivets that lead to the topmost platform. Once there, the Minis can grab a pair of Hammers and destroy another Pokey that patrols the ground before the door.
The M Coin is floating just above a Long Spring on the top right section of the level, and is topped by a column of Coins. The M Coin can be collected by jumping off said Long Spring, or climbing the Ladder to the right and falling into the gap that follows.
Nintendo 3DS version
Wii U version