Morph Ball

One of the most prominent items in the Metroid games, Morph Ball Mode is the mode in which Samus Aran turns into a ball. It allows her to explore small tunnels which usually lead to rooms with crucial items in it. Morph Ball Mode is vital in defeating many bosses from the series, including Pogo in Metroid Fusion and Amorbis in Metroid Prime 2: Echoes. In non-Prime games, it usually plays an important roll in escaping from enemies, such as in Metroid: Zero Mission. The Morph Ball has many upgrades, such as the Bomb Module, Power Bomb, Boost Ball, and Spider Ball, to name a few. In Metroid Prime Pinball, it is the ball the player plays with on the pinball machine. In many of the Zebes-based games, the player acquires it almost immediatly after beginning the game.