Donkey Kong Plus (stage)
Donkey Kong Plus is the stage where Mario faces Donkey Kong as the final boss in Mario vs. Donkey Kong. After running off with six Mini Marios, Donkey Kong hopped into this giant robot and stuck the toys in between its fingers.
DK's robot's attacks all involve its fists.
The Robot's only weakness is its head, in which DK controls it. Mario must pelt it with Barrels seven times, the first six times freeing a Mini Mario. The last Barrel will take out the Robot for good, electrocuting DK and blasting him out of the destroyed machine.
The robot in fact resembles a robotic Kong. It has a long laser that acts as eyes and a mouth that indeed looks like Donkey Kong's.