The Underwater Reactor
Items:
Battle Trumpet, Scimitar, Leviathan Scales
When you reach Junon Village, you have to ride the elevator up to Junon for 10 Gil. (This should give you a good idea of just how little Shinra's troops get paid). There's no need for a disguise this time around; just head down to the main street and follow it to the sector that splits the left and right sections of town.
Note:
Your characters will pause in the middle of the street. Cloud mentions that something seems to be missing. What is it? The Junon Cannon!
This area should look familiar from your first visit to Junon. Follow the group of soldiers to the Underwater Reactor elevator and ride it down to the ocean floor. Unfortunately, there are two soldiers on the elevator who attack you to show off for the elevator operator. You'll run into a lot of these guys as you make your way to the reactor.
Note:
There's an alarm in the hall before the elevator. Cloud can trip the alarm, but it doesn't effect the game in any way.
When you reach the ocean floor, enter the plant and take the elecator down. Follow the walkway to the reactor's core, but watch for Shinra patrols.
The team arrives a little too late. Shinra has the Huge Materia, but they haven't loaded it onto a submarine yet. Run to the submarine bay and try to intercept.
Wouldn't you know it? Reno is here and he's brought along a nasty surprise.
Boss Fight: Carry Armor
The Carry Armor isn't too diffcult to defeat. You can take advantage of its weakness to Bolt spells if you come equipped with "Lightning" and "Ramuh" Materia.
At the start, set up MBarrier and cast Haste and Regen on the entire party. Don't waste time trying to cast effects like Slow or Stop on the Carry Armor, because it's immune to any kind of negative status. Use Bolt and Rumuh to deal some serious damage, while concentrating it's left with the center torso and the Lapis Laser attack. The MBarrier should cut the Lapis Laser's damage down from about 1,500 to 750. Just keep casting MBarrier as it runs out.
During the battle, the Carry Armor may pick up one of your characters. He/she cannot participate in the battle and the time bar on any status effects will be locked in place until the character is freed. After the character has been grabbed, there are only two ways to recover him/her. The first is to kill and the resurrect the character once the Carry Armor has dropped the lifeless body. This isn't diffcult to do since any attacks against the Carry Armor will also cause damage to any captured heroes. You can also release a captured characters and kill the third, the battle is lost and the game is over. You receive the God's Hand for winning the battle.
Because of the distraction caused by the Carry Armor, the submarine gets away. But don't worry - the team can just hijack the other enemy sub and chase down the runaway. Before boarding the enemy sub, grab the chests scattered across the docks.
Note:
Be absolutely sure you get the Leviathan Scales before leaving. You'll need them to put out the flames in the fire cave at Wutai.
The submarine crew isn't about to give up their ship easily. Fight your way onboard and take over the controls. Your friends from the parade are manning the control center, but you don't have to kill them - it's your decision.
Tip:
You can steal a decent piece of armor called the Shinra Alpha from the captain if you decide to kill the crew.