These are the items that appeared in Phase 3.
At the bottom of the area, Samus must find the shaft with several midair pillars, and go through the first open hatch on the right, then drop down another, Autrack-inhabited shaft. She must destroy a Red Hatch at the bottom; through which the Boots can be found in a Chozo Statue.
Hidden in the area is a tall pipe leading into a Morph Ball tunnel. The tunnel leads to a Red Hatch, through which Samus will find an empty Chozo Statue. She must bomb the floor directly in front of it to find the Varia Suit in a hidden chamber.
From the same pillar-filled shaft leading to the High Jump Boots, Samus must proceed into the corridor on the top left, and then through a tunnel in the wall, to a Red Hatch. Through here is the Wave Beam.
At the bottom of the pillar-filled shaft, Samus must proceed through the corridor on the left, and fall down a smaller shaft, then enter the corridor on the right. The Energy Tank is in a boxed-in area on the ceiling. The High Jump Boots, which can be seen in a hidden tunnel in the right wall, may be needed to access it.
Missile Pod 1Edit
Entering the main cavern of the area, Samus must scale the first ledge in front of her, and then climb the wall before her with the Spider Ball. She will enter a tunnel higher up in the wall, and find the Pod.
Missile Pod 2Edit
From the ledge on the top left of the same chamber that leads to an Alpha Metroid's abode, Samus must roll against the cave ceiling with the Spider Ball until she reaches a tunnel farther in it, that leads up to the Tank.
Missile Pod 3Edit
At the very bottom left of the main area, Samus must proceed right to find a tunnel leading to a small alcove with the Pod.
Missile Pod 4Edit
Under the Varia Suit, although to obtain this Samus must slide down a tall vertical pipe to find a hidden tunnel taking her to the Pod (after the Alpha Metroid).
Missile Pods 5 and 6Edit
In the corridor on the bottom left of the vertical pillar shaft, Samus will find these Pods hidden within two boxed-in areas, one of which is on the ceiling directly above the other.
Missile Pods 7 and 8Edit
Directly under the previous two, again in boxed-in areas, although both are on the ground. In the same room as the Energy Tank.