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 with a large smile. If you kill them, they look blue with a straight face. They jump out of a blue drain which says "DRAIN" on it.
Happy Campers can't hurt you if you go in front of them. They only jump up and down, out of the drain. If you hit them, you can fling them to the other side, impale them on a pink stick, and walk across them as a bridge. However, when you hurt them, they look blue, as if they've gone weak or died.