The Zrink (サンパ Sanpa) is an Aurum enemy introduced in Kid Icarus: Uprising. At full health, Zrinks are triple-layered hexagons that slowly float about firing occasionally. As they are damaged, the outer hexagons disappear, exposing their spiky "skeletons". The smaller a Zrink becomes, the more quickly it moves and fires.
Kid Icarus: Uprising
"Initially, Zrinks are large, slow-moving targets. Yet as they take damage, they shed their outer armor, making them smaller and allowing them to move faster. They rarely attack, instead providing defense for nearby Aurum"