Slime

Slimes are enemies in Kid Icarus: Of Myths and Monsters that roam around in Fortresses, randomly jumping from floor to ceiling. They're not as small as they appear, and Pit's arrows will skewer one if it's directly above or below the angel. Slimes are creatures of chaos and change their direction and orientation at a moment's notice, so Pit should keep his distance.

Kid Icarus: Of Myths and Monsters
"Sticks to the floor or ceiling and jumps between them from time to time."