The Dumbles like to film people and record reality-TV shows to be broadcast in their home land of Dumbleville (which happens to be located under The Treehouse). They have a strong disliking of The Mud-Munchkins as well. The Dumbles love to spy on people and can sometimes get to the point of being annoying.
The Dumbles are extremely small in size, since they are elves. They have olive green skin, large noses and pointy ears. They wear a green shirt and a green hat which covers their eyes. They also wear green and aqua striped tights covered by white shoes.
Some Dumbles have alternate outfits featuring different colors as well.