Here you’ll find the location for every Beam Ammo Expansion in Metroid Prime 2: Echoes, as well as detailed explanations on how to get them and what powerups you’ll need.
Beam Ammo Expansion #1
Location: Central Mining Station, Agon Wastes
Requirements: Morph Ball
After acquiring both the Light and Dark Beams, make your way back to the Central Mining Station from the upper entrance. Use the cannons to destroy the structures in the back right side of this room, opening up a pathway, and proceed over. On the back left, there will be a Morph Ball tunnel you can slip through to grab the Beam Expansion.
Beam Ammo Expansion #2
Location: Cache A, Dark Torvus Bog
Requirements: Seeker Missiles
From the Poisoned Bog, use your Seeker Missiles to open the purple blast door. The Expansion will be sitting right there.
Beam Ammo Expansion #3
Location: Watch Station, Sanctuary Fortress
Requirements: Spider Ball, Bombs
From the opening in between the Sentinels Path and Watch Station Access, follow the Spider Tracks path until you get to the Kinetic Orb Cannon. Use it to launch you towards a wall of Spider Tracks. You’ll need to follow the path until you arrive at the uppermost Morph Ball tunnel. Follow it to get the Beam Expansion.
Beam Ammo Expansion #4
Location: Profane Path, Sky Temple Grounds
Requirements: Echo Visor, Annihilator Beam
Use your Echo Visor in conjunction with your Annihilator Beam to unlock the sonic barrier door that stands between you and the Expansion. Once the door has been lowered, head over and claim your prize.
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