This category lists all item upgrades in the Metroid series that are referred to as "unknown". Unknown Items are present in Metroid: Zero Mission, Metroid Prime 2: Echoes, and Metroid: Other M (under the name Details Unknown).
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Gravity Suit -
Plasma Beam -
Seeker Missile -
Space Jump -
Power Bomb Expansion -
Diffusion Beam -
Unknown Item -
Energy Transfer Module
All items (8)
