Bog Monster

The Bog Monster is an apparently horrific creature which resides in the Forbidden forest on Kongo Bongo Island in the Donkey Kong Country cartoon.

In the Donkey Kong Country episode "Bug A Boogie" it is revealed that Donkey Kong secretely feared the Bog Monster, as, when he was young, Cranky Kong told him that if he ventured into the Forbidden Forest, the Bog Monster would get him; one day, Donkey Kong disobeyed Cranky Kong and decided to go into the Forbidden Forest, only to encounter and subsequently be scared by a Bog Monster.

It is later revealed to Donkey Kong by Cranky Kong that he had, in actuallity, simply made-up the story of the Bog Monster; and that it was him who scared Donkey Kong when he entered the Forbidden Forest, wanting to teach Donkey Kong a lesson in disobeying him.

Oddly, it seems the Bog Monster may have been an actual creature, as, at the end of "Bug A Boogie", Klump and Krusha, while trying to help King K. Rool out of a pit of quicksand he was stuck in, hear a monstrous roar in the Forbidden Forest, seemingly the Bog Monster.