Magnet Mania (Mario vs. Donkey Kong: Minis March Again!)
Magnet Mania, also called Floor 3 (Floor 2 in the British English version), is the third floor in Mario vs. Donkey Kong: Minis March Again!. This floor is largely based on the floor of the same name from Mario vs. Donkey Kong 2: March of the Minis, as they both revolve around the use of magnets, as well as conveyor belts and conveyor switches. Pop-up Gates are also formally introduced here to the player, even though one appears in Sandstone Stroll in Room 2-SP. It is also the first floor in the game to feature Capture Kongs, Thwomps and Pokeys. After the player beats Donkey Kong on this floor, they unlock the Magnet Mania Construction Kit in the Construction Zone, which contains all elements featured on this floor.
The background appears to be a storage facility with pipes, stacks of multi-colored crates and mechanical hands carrying other crates. The soundtrack consists of variations of the underground theme from Super Mario Bros., which were also featured in the March of the Minis counterpart of the floor.
This floor contains tutorial levels that showcase magnets, conveyor belts and Pop-up gates. The player can access and play them by tapping on the "?" icon in the bottom right corner of this floor's level select screen.
In Plus Mode, this floor is subtitled Floor 3+ (Floor 2+ in the British English version). This version adds Color Blocks and Piranha Plants with fire to the floor, as well as Magnet Rods, a new mechanic in the game. These elements become available in the Magnet Mania Construction Kit once the floor is beaten on Plus Mode.
Compared to its Normal Mode counterpart, the background appears to be gloomier and to lack any activity. The soundtrack is reused from Spooky Attic, the seventh floor of Mario vs. Donkey Kong 2: March of the Minis, and is a variation of the Spooky House soundtrack from Mario vs. Donkey Kong.