Happy Campers (Browny Bon-Bon in the Japanese version) are enemies that appear in scene 4-1 to guide Headdy as a bridge.
Happy Campers look like round, light brown circular enemies. If you hurt them, they look blue. They comes out of a blue drain which says drain on them.
Happy Campers can't hurt you if you go in front of them. They jump out of the drain. If you hit them, you can fling them to the other side as a bridge. However when you hurt them, they look blue, as if they've gone weak.