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This is Samus' most powerful item in her conventional weapon arsenal. When unleashed, it creates a massive thermonuclear explosion that can destroy any living thing within its radius, even going offscreen. It can destroy most enemies in one hit, including certain bosses. It can incinerate organic matter, meaning it can instantly kill [[Metroid|Metroids]] and [[Space Pirate|Space Pirates]] instantly. It can also instantly kill the [[Rhedogian]] in [[Metroid: Other M|Other M]], despite it's intense durability. It is also the only weapon powerful enough to destroy objects made of [[Bendezium]] and [[Denzium]] and [[Geron|Gerons]].. Lastly, it is the only weapon powerful enough to cause a [[Desbrachian]] to awaken on the [[Bottle Ship]], but a second one will not kill it. While the Power Bomb's devastation is dialed down quite a bit in the Prime subseries, it is still a very potent weapon and can kill most enemies instantly, including the light and a dark [[Ingsmasher|Ingsmashers]].

The Boost Ball is a movement system designed by the [[Chozo]] for the Morph Ball. Featured only in the Prime subseries and Hunters, it is a chargeable item that propels the Morph Ball at high speeds. It can damage most enemies and is useful for damaging low targets on several bosses in the games. It can also be used on half-pipe like formations that allow Samus to reach all new areas. It is used to activate the many many [[Spinner Device|Spinner Devices]] found all over the games and propel the Morph Ball away from [[Spider Ball Tracks]] in ''Echoes'' and ''Corruption''.

The Spider Ball is an upgrade to the Morph Ball that allows Samus to cling to walls climb them to reach heights that are inaccessible by any other method. First appearing in [[Metroid II: Return of Samus]], it allowed Samus to cling to nearly any surface. In the Prime subseries, it is limited to [[Spider Ball Tracks]]. It functions the same in all games. It is key to defeating certain bosses and is one of the items stolen from Samus in the prologue to ''Echoes''.