Floor 4+ Donkey Kong
Floor 4+ Donkey Kong (titled Floor 3+ Donkey Kong in the British English version) is the Donkey Kong level in the Plus Mode version of Magnet Mania and the final boss level in Mario vs. Donkey Kong: Minis March Again!. It is a more difficult version of Floor 4 Donkey Kong, the level's Normal Mode counterpart.
The stage is nearly identical to its Normal Mode counterpart. Donkey Kong leaps between vines at the top of the screen and must be hit with bananas from above by launching Mini Marios onto them. However, compared to the Normal Mode version, more Snapjaws spawn during the battle, with one already being present at the beginning. The Nitpicker's egg-dropping pattern is also different; it drops two eggs after DK is hit the second time, two or four after the third hit, four after the fourth hit, and five after the fifth hit.
To defeat Donkey Kong, the player must land him six hits.
Mini Mario Card
The Mini Mario Card appears after Donkey Kong is hit a second time, replacing the banana bunch that hit him last. The player can collect the item by launching a Mini Mario into it. After collecting it, a banana bunch will spawn again in that place.