|Location||Plasma Room, Maridia|
|Effect||Greatly increases beam damage and adds piercing effect|
Plasma Beam is the strongest beam upgrade with respect to damage, and causes the beam to pierce vulnerable enemies. Note that it does not allow the beam to penetrate objects and surfaces like Wave Beam does.
Plasma Beam's piercing effect allows the player to be able to "hitbox" enemies. By striking an appropriate enemy with the beam right before Samus would run into them, Samus will instead be able to pass through the enemy unscathed. This is most commonly applied in Lower Norfair rooms containing Kihunters.
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