Mushroom Mayhem

Mushroom Mayhem is the first floor in Mario vs. Donkey Kong 2: March of the Minis. Mario and his Minis enter this floor after Pauline is kidnapped by Donkey Kong, beginning their quest to save her. Most of this floor's levels feature girders and Pink Blocks. The only enemies on this floor are Shy Guys, Piranha Plants, and Circus Kongs.

In the background of each room, a rendering of Peach's Castle can be seen. A floor similar to Peach's Castle appears in the game as the sixth floor, Toadstool Castle.

The various music tracks played on this floor are remixes of the Mini Mario levels from Mario vs. Donkey Kong.

During the first battle against Donkey Kong, referred to as Boss Game 1, Mini Marios are loaded into a cannon, while Donkey Kong hides behind a wall with three windows. Occasionally, he appears behind one of the windows, during which the player can shoot him with a Mini Mario by tapping the "Shoot" button below the cannon. Donkey Kong attacks by slamming the ground, causing barrels and dumbbells to fall from above, which can be avoided by moving the cannon with the stylus. If a Mini Mario touches a Barrel or dumbbell, it breaks; if 25 Mini Marios are broken, the player loses the boss battle. After taking 6 hits, Donkey Kong is defeated and flees to Tropical Island.

Names in other languages
Valle dei Funghi