From StrategyWiki, the free strategy guide and walkthrough wiki

What to take

• Weapon: 3-Way or Rocket Launcher
• Transmitter: Red

[edit] Walkthrough

You can't come here until you complete Area 11.

At the first com station, Super Joe will tell you that you need to destroy a power source to open the pathway to the other side of the base. Go to the bottom of the elevator and to the left and into the tall passage with electric balls charging some of the floors. Go up each floor slowly (press +, then once more to avoid taking damage). If you grapple diagonally, you will get hurt. Head to the center and enter the boss room to fight the power source. Destroy the power source console.

Head outside and up the passage, again using the grapple to avoid taking damage. Go to the bottom of the elevator again and head right through the now open hallway. At the second com station, Joe will tell you that he will destroy the other power source (he doesn't) and that it's your job to take out the leader. Wire-Tapping here will let you know that the enemy knows Super Joe is coming; however it will also set off the alarm. Take the door at the top right of the elevator. Inside the tall passage with yellow floors, grapple the ceiling right away to avoid taking damage from the rolling ball. In the center is a door to a console room that has already been destroyed (but contains a shielded grapple enemy). Ignore it and make your way to the bottom where you'll enter a door to another power source console, but this time soldiers parachute in while you have to deal with the springs and the turret.

Make your way back to the top and exit the passage. Take the elevator to the bottom and dispose of the two soldiers. Head left through the open hallway, and take the elevator down to the spikes. Grapple your way across the spikes and enter the door. This is the revival room. As you approach Killt, a cutscene will take place where Master-D absorbs him into his body and then awakens. Since you are going to put up a fight, he retreats into the Albatros and fights you from there. If you're standing on the ground, remember to duck to avoid taking damage. There's one weak spot at the top right of the ship, but to get there you have to grapple up the left jet of the pair at the bottom right, then grapple straight up. You can pull yourself up and fire away, then drop when the top jet is about to fire. With the 3-Way, if you fall off of the right most jet you can fire upwards and hit the weak spot 1-2 times. After the Albatross takes about as much damage as a console, it will explode and a new stage will begin.