Duplicate 255 Weapons
Equip Cecil with arrows in his good hand and a bow in his bad. Get in a fight, and go to item.
Select the arrows he has and put them in an empty space. Without leaving the window, choose the
Avenger sword and move up and trade it for the bow you had equipped. Leave the item window,
and his commands will disappear. Do NOT have anyone else do anything!
Once Cecil has cleaned up all the enemies, go to the EQUIP
screen and you should see the Avenger in his bad hand and a number
in his good hand. Unequip the Avenger, and equip whatever weapon
you want duplicated in his good hand (where the number is). De-equip,
then re-equip. Voila! The weapon in the item screen will have
a black box and a number beside it. 255 of them!
During a battle, go to your item list and select an empty space. Next select one of the items you are holding (sword, shield, etc.) Run away, then re-equip the item and you will have two of them!
Dwarf Castle Crystal Glitch
After you defeat Calbrena and Golbez in the Dwarven Castle, you will get Rydia back. When King Giott finishes speaking to you, cast the Warp spell. You will appear in the Crystal Room behind the throne. Strangely enough, the Crystal is still there! Take it and this will save you the trip to the Sealed Cave. You will still have to take Luca's Key and enter the exit the Cave, but then Kain will take the Crystal as if you defeated the Evil Wall for it! Very strange, but an awesome cheat.
In the underground, go to the land of monsters and get the rat's tail in a chest by the entrance. Then, in the overworld, use the HoverCraft to get to the silver mine near Silvara. Give the guy the rat's tail and he will give you Adamant. Go back to the underground and find the weapon master in the lower-right hand corner. Talk to the guy on the second floor and he'll transform your old Legend Sword into the super-powerful Excalbur. NOTE: Only Cecil can use the Excalbur.
Kill Undead Monsters Easily
To kill undead monsters (ie. spirits, skeletons, etc.) Use cure on them. Fire works just as well. If your character can't use magic, equip him with a holy weapon (i.e. Light Sword, Crystal Sword, etc.)
Kill Zeromous Easily
First of all, equip Cecil with The Crystal Sword, Helmet, and shield. Equip him with the Adamant Armor, And the Zeus Gauntlet (glove). Make Cecil use the CRYSTAL to transform Zemus to Zeromous. Use Edge's Spoon dart and regular attacks. use Kain's jump attack or White spear. Make Rydia cast METEO, NUKE, and BAHAMUT. Make Rosa cure the party and use the WHITE spell to hurt Zeromous bad. Repeat this about 4 times and Zeromous will crumble up and DIE!!!!
If you talk to Yang's wife as soon as you get out of the Underground, she gives you a Frying pan. Use the frying pan on Yang in the cave with the Sylphs, it will knock Yang conscious, but he will nhot join you. Then give the frying pan back to the Wife, and she will give you a Spoon. The Spoon is the most powerful throwing weapon for the Ninja.