VIDEOS:
Giant Donkey Kong
As a single-player boss, Giant DK is a threat. When Promoted To Playable, without the buffs he gets in 1P mode... he has some shortcomings, luckily for the purple Polygon Mario, who takes no damage.
The red boxes are the actual range of the attacks. Compare them to the model.
Example of:
Hitbox Dissonance
Example of:
Promoted to Playable