The Gamma Metroid is the fourth stage of a typical Metroid's life cycle. They appear in two games in the Metroid series, as an enemy in Metroid II: Return of Samus, and a cameo in Metroid Fusion. The Gamma stage is not very different from the previous Alpha Metroid; both have the closed membrane as the belly and a plated exoskeleton on top. Whereas the Alpha Metroid had small barb-like growths along its sides, they have now grown into longer limbs. The previous form also had only a pair of single eyes, and now they have multiplied into a pair of groups of three. The creature's forehead horn has become larger and more well-defined. The Gamma Metroid is capable of paralyzing enemies with a small field of static electricity emanating from its lower membrane. This lightning attack can deflect