Morph Ball

Morph Ball
The Morph Ball is another Metroid trademark. After finding this item Samus can roll into a ball and access narrow passages that she could not otherwise access. There are a number of upgrades Samus finds for the Morph Ball.

Bomb
Allows Samus to break certain objects, activate some devices, and damage enemies. The force from the bomb can also catapult her up a short distance in Morph Ball form. Samus has an infinite number of these, but can only use three every few seconds.

Boost Ball
Replacing Super Metroid's Speed Booster to a certain extent, this item allows Samus to build up energy and release it in Morph Ball form, resulting in a burst of speed that can, when applied correctly, allow her to travel up half-pipe structures and activate certain machines.

Spider Ball
Metroid Prime is the second game to use this item (the first being Metroid II: Return of Samus); however, where Metroid II's spider ball allowed Samus to go up any wall, Prime's spider ball can only travel up designated magnetic rails.

Power Bomb
These are a more powerful version of Samus' normal Bombs. While she only gets a finite number of these and must replace them as she does with Missiles, Power Bombs have a much greater destructive ability.