A Grublin Hood is the only enemy (besides the beehives) found in all four seasons of Click Clock Wood in Banjo-Kazooie. They are related to the Grublins found on Mumbo's Mountain. Being that they are the main enemies of the last and longest playable world, they are a bit tougher than most other enemies. However, they can still be easily defeated with a single hit from the Rat-a-tat Rap.
Trivia
The Grublin Hood's appearance and name are likely a reference to the fictional character Robin Hood.