From the Super Mario Wiki
New enemies introduced into this area are Kongā, Snapjaws, Bob-ombs, Bob-omb Fish, and Nitpickers. All different toy Kongs make an appearance here. This area also introduces Bomb Blocks which once removed allow the player to set a bomb on stuff which will the proceed to explode and defeat any enemies near it. These can also be used to destroy Cracked blocks.
The battle with Donkey Kong is fairly different to last encounters. If a Mini hits him they break because Donkey Kong will punch them. Snapjaws are obstacles here and can be hard to avoid. However the biggest hazard of all is a Nitpicker who is constantly moving left to right and will occasionally attempt to drop on the minis. After hitting Donkey Kong with a Banana, he will start jumping from vines and the Nitpicker will start dropping Eggs on the minis if it's not defeated. The only way to beat Donkey Kong is to drop bananas on his head. If a mini drops these bananas on one of the Snapjaws or the Nitpicker. They will be temporarily defeated. Once defeated, Donkey Kong flees to the Roof.
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