The most effective weapons that Samus can use are Super Missiles, although the knee armor is more resistant to them than the shoulder armor. Rolling through its legs in the PAL and Wii versions of Metroid Prime and laying a Power Bomb can instantly destroy all or most of the plates. The Omega Pirate will use its energy-siphon system to absorb any shots Samus fires from time to time. The Omega Pirate's Phazon Armor may have been a precursor to Phazite.