Grandia

First you have to beat Ball, this can be easy or hard depending on your level. The easiest way is to have Rapp use Demon Ball twice then attack to save Sp, Fenna use Zapwhip then dragonzap then have her attack, Liete use all heal or symphony if your life is high and have Justin equipped with Spirit Sword and Ashura as Accessory. Then just attack to save SP. Attack Ball and ignore his partners. When you have done this go on the drop again to travel to the top floor. Get the items and use Liete spells to heal up then use an SP potion to heal your magic and the gold potions to heal Sp. Go to the hallway and engage in battle with Gaia. Use the same method but have Justin use Midair Cut. Don't use any thing with magic evolved or his last attack I do not know what it is because I did not need it. The Mega-Gaias should be your first target to keep them from producing more guys. Ignore the ones they produce because after you kill them they come back. After you kill the Mega-Gaias they die anyway. Take down both and then go after Gaia. Just attack because I was to fast for him and he did not hit me once. After he dies you have to beat his heart. He did not hit me once, all he used was cold and my guys were not effected. After this you beat the game.

To defeat the first Gaia you will need free experience. When Gadwin and Sue leave your party they leave experence in books. Use these books on Justin and Feena. Concentrate on attacking Gaia's body, not the arms. Once the body is gone the Gaia is destroyed. Use Midair Cut, Burnflare, Milda Kick, and Rapp's missle or discutter will finsh the Gaia quickly. Just to be on the safe side heal as much as possible.

If you reach a save point don't recover right away. Take any character with water magic and spend all of their MP casting healing spells. This will give you Water magic experience points. Then step on the save point and recover. This way you can get water experience, but recover the mp right away.

Use your strongest moves for about 10 turns and he's finshed.(I beat this boss in 5 minutes)

As you walk up to a door or a gate, it will open. Back up slightly then go full force toward it. Because you backed up, it should be closing while you go through it. This may take a few attempts.