Gravity Suit Search

Walkthrough: After obtaining the Plasma Beam, exit through the green glowing door below you. As you go up the tall room, you'll notice an Energy Recharge Station. Reach the top of the room and then roll into the connecting room. For now, don't worry about the elevator you find. If you'd like it, another Missile Expansion can be found by going into the passageway in the top right corner of the room.

Continue to the next room you find, the one filled with water and that contains a number of platforms. Use the platforms to make it to the next two sets of doors, which happen to contain the Gravity Suit. With it, you can now freely move above waters. As you leave the room that contains water, you'll be able to find the next Missile Expansion by Bombing the weak point in the bottom right corner of the room.

Missile Expansion #1: Enter the hallway in the top right corner of the room through the green door in the beginning of this section. Reach the top and enter the next room, using the Phase Drift to run through this area to next door you find. Continue to use the Phase Drift, as you'll need to do the same exact thing in the next room. Once you reach the yellow door that you can't pass through, use your Spider Ball to cling to the right side of the drop to find the weak spot that holds the Missile Expansion.

Missile Expansion #2: After obtaining the Gravity Suit, make your way through the waters. Keep a look out for a weak block in the bottom right corner of the room. Roll inside and jump immediately up into the area with more red spikes and shoot your Grapple Beam upward. Pull yourself up and roll around to where the next Expansion is found. The green floor will crumble if you touch it, so make sure to use your Phase Drift to make it past. Hang on the ledge to the right of the weak point and shoot it with a missle, thus revealing the Expansion.