Bang

A Bang is an unused creature in Super Metroid. It is referred to as a "Possessor-type" enemy. It grows as it gets shot, until finally it fires a charged blast at Samus before the bubble bursts, revealing the red core, its weak spot. It can also "possess" other enemies, but what exactly this entails is unclear. It bears a resemblance to Metroid Prime's nucleus from the end of the first Prime game.