emeraldguide

Emerald

Whoa. This guy is extremely hard to beat, and with over 1,000,000 HP it's gonna take a while as well. When he is annoyed, he unleashes his Aire Tam Storm which does 9999 unblockable damage to all party members, and heals himself.

The requirements for defeating him are as follows:

1 Final Attack at least level two.
2 Phoenix at the same level as Final Attack.
3 Knights of the Round at level 2.
4 HP Absorb.
5 Quadra Magic at level two.
6 Bahamut ZERO at level two.
7 Two magic plus materia (one at master level).
8 Several HP and MP plus materia at high levels.
9 One or two Mime materias (two preferred).
10 Two Sprint shoes.
11 W-Summon.
The battle is going to take at least an hour to complete, so getting the underwater materia from the Man at Kalm is very important. He'll only give it to you if you morph a ghost ship into a guidebook for him.

First pick the guy who has got the highest magic and HP level (Cloud), next equip a loser/cannon fodder with the under water materia. Now equip Cloud with Final Attack linked to Phoenix, Mime, Sprint Shoes, Magic Plus, MP Plus and the rest HP plus materia. Clouds HP should be over 8500.

For the last character equip Quadra magic linked with Bahamut ZERO, HP Absorb linked with Knights of Round, W-Summon, Sprint shoes, the other Magic Plus and enough MP plus' to get the MP over 800.

Just before you battle, save your game. In the battle, make your last character cast W-Summon once for Bahamut ZERO and once for Knights of the round. After, have Cloud mime it. You will see Bahamut cast 4 times and KOR once. If your magic levels are high enough, this should do 150,000 points of damage. Now wait for Clouds turn again, skipping everyone else, then have him mime again. Everyone else will probably die, but keep on miming with Cloud. You will probably be able to mime three more times because you would have been healed to full health every time (HP Absorb). However, by the fifth time Emerald gets hit with KOR, he will get annoyed and unleash his Aire Tam Storm. You will die, but Phoenix will resurrect you. Put your last character back into action by casting W-Summon Knights of the round on Emerald. Mime again with Cloud once that is finished.

By now you've hit emerald eight odd times with KOR, so one more mime from Cloud should be enough. Even if you die, Phoenix will resurrect you all and you can cast W-Summon Bahamut ZERO once more. Then Emerald dies... and you get loads of EXP and AP and can feel deeply satisfied that the bitch is dead...