Mystic Forest Plus
From the Super Mario Wiki
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Mystic Forest Plus is the fifth plus world that Mario chases Donkey Kong through in Mario vs. Donkey Kong, and as before with its standard counterpart, takes place in a forest. The background is the night version of Mystic Forest first seen in its boss stage. Monchees no longer appear in this version, but all other enemies from the original Mystic Forest make a reappearance, with no additions.