Super Missile Search

Walkthrough: After obtaining all the collectibles from the Diggernaut Battlefield, start heading up the right side of Area 4 by using your Space Jump. You should eventually come to a long passageway that leads to a door. Head inside and keep moving until your reach an Aeion Recharge Station. From there, head through the door on the left (not the green barrier door) to find the next Teleportation Statue. Pull on the red orb in sight, and the jump up through the room to find another Save Station.

From there, continue upward until you find the Energy Recharge Station. Head pass the door on the left that leads to another lava-filled room, entering the following room to obtain the Super Missile. With the Super Missile, you can open doors with green barriers. Use it on the green barrier in the room you're currently in, and then exit through that door and go through the door at the very top. However, before leaving, don't forget to get the Super Missile Expansion on your way out.

Super Missile Expansion: After you obtain the Super Missile, go into the next room and drop down into the water. Shoot a Super Missile upward, and then use your Grapple Beam to pull yourself straight to the Expansion.