Final Fantasy: Mystic Quest Cheats :
Code - Level up twice
by Unregistered May 09, 2011
When you fight at a battle ground, you can level up twice. When you have only one fight left on a battle ground that gives you experience as a prize, or "cleaning them out", you need to go fight elsewhere. You will then level up in the next battle you fight. Finish off that battle ground and after you level up when it gives you your prize of experience, you will level up again.