Kirby's Dream Land 3. He is invisible at first to try to surprise Kirby or Gooey. He is always floating or basically in a wall.
When playing as Kirby or Gooey, stay under him. He will then be visible and then he will use the tongue to catch one of them, and then he'll start to chew Kirby or Gooey. Then he'll blow them away and they'll recieve damage.