Originally Posted by Dragon Mage
Wow. Am I the only one that killed Emerald with one person?
Here's what I did:
Before you go to battle Emerald make sure to of your characters are knocked out leaving the one person you plan to use alive.
Equip this person with a Mystile. It doesn't matter what weapon you equip, you won't be hitting Emerald anyway. Maybe sprint shoes if you want to go fast.
Materia: KOTR with HP absorb, W-summon, mime, and HP or MP+, take your pick. No you do not need the underwater materia to do this. I know. I've done it 3 times. If you do drown (unlikely, if you do it right) just start over.
This is how happens. You get to attack immediately since you team mates are knocked out. W-summon KOTR. Mime. And that's it. Don't break the routine our you'll be screwed. HP absorb will get you back to full health each cycle. So you don't have to use any Restore or Mega elixers. BE SURE TO EQUIP ONLY THESE FIVE MATERIA. If you equip any more than you'll die. There will be a timer but if you do it right than you will end up with 50 sum seconds left. You may seem to be cutting it close but actually it's perfect timing.