Mad Mole Holes

Mad Mole Holes is the boss level of the Monkey Mountains & Chimpanzee Clouds, the third world of the game Donkey Kong Land. The Kongs must whack a giant mole, Hard Hat, to progress to Big Ape City.

Level layout
The fight takes place in a single-screen cave, with three holes on the ground through which Hard Hat periodically pops up. While no Buddy Barrel is broken on-screen, both Donkey Kong and Diddy Kong are available to the player from the start of the fight, regardless of their previous status.

When the mole boss emerges from a hole, he is invulnerable while wearing his hard hat, although touching him does not cause damage to the Kongs (despite the fact that they flash briefly as if they had taken a hit). He does not turn around after emerging from the hole, even if the Kong in play jumps over him.

After a moment, he rolls his hat in the direction he is facing, which injures the Kongs if they touch it but leaves him vulnerable to being jumped or even walked over. There's a "hit" sound if a Kong actually jump on him, but if they walk over him there is no additional sound, although he assumes his "hurt" pose and takes the hit. He dives back down into his current hole if not hit, and emerges wearing a hat again.

After every hit, his speed increases and the window where he is vulnerable before retreating shortens. After eight hits, he is defeated, three bunches of bananas fall from the ceiling and the way to Big Ape City is clear.