From WiKirby, your independent source of Kirby knowledge.
Bloon is an enemy which made its debut (and only appearance) in Kirby: Canvas Curse. It provides the Balloon ability when collided with.
Bloon is an acorn-shaped being with two round hands, a pointed head, and two small black dots for eyes. It floats in place with its mouth closed, presumably to keep in air. It doesn't pose much of a threat to Kirby, who will absorb its power should he collide with it.
Bloon floats in place, and does not move. It must be stunned before it can be collided with, or Kirby will take a hit.