Level 3-5 (Mario vs. Donkey Kong: Tipping Stars)
From the Super Mario Wiki
Level 3-5 is the fifth course of Runaway Warehouse in Mario vs. Donkey Kong: Tipping Stars. It marks the debut appearance of Cannon Kongs, toys that use their cannon-functioning bodies to automatically blast away any Mini that enters them.
The level features two Mini Marios.
The course is rather small in size, encompassing several Purple Conveyor Rivets and two Cannon Kongs, standing on different floors and facing opposing directions. The two Mini Marios start in different parts of the course, both facing the bottom Cannon Kong, which prevents them from getting to the Goal Door. They can circumnavigate the enemy by heading for the Cannon Kong at the top of the stage using Purple Conveyors placed by the player and shooting from it into an area on the left, near a pair of Hammers; the Minis should then fall back on the bottom floor and, with the Hammers, stun the Cannon Kong there, gaining passage to the exit.
The M Coin is located left from the Hammers, and is accessed by shooting from the top Cannon Kong, then building a Purple Conveyor between the Hammers and the coin to have the Minis land there.
Nintendo 3DS version
Wii U version