Final Fantasy VI Advance - Earth dragon boss fight

Unless you're lucky (like me) and get a Preemptive Strike, the first thing he'll do is use 50 G's, which negates any Float status. He'll then use Magnitude 8 and Quake to do major damage to you. But, if you listened, you'll be healed by both attacks, and anyone with the Angel Wings relic equipped won't have to worry about 50 G's and the earth attacks, because Angel Wings gives you a permanent Float status. He can hit for close to 2500 damage, so be ready to heal. The earth attacks will heal him (around 2500 for Magnitude 8 and around 5000 for Quake), so you've got to nail him fast and hard, or else he'll outlast you. You can also try to cast Float on the Dragon itself. If it connects, it will prevent it from getting healed by it's Earth-type attacks. I suggest using the Soul of Thamasa to quickly kill the Dragon. Duelcast Ultima-Quick, then use 4 Ultimas. If you're good, then you will only need to do this twice before he dies. If you're unlucky, you'll only do enough damage to him, and then he will become enraged, attacking 4 times with close to 3000 damage per attack. This can easily wipe your party out, so try to bypass that by killing him in one fell swoop.