Lufia II: Rise of the Sinistrals Cheats

Defeat the Jelly at the bottom of the Ancient Cave in your first play-through and you will receive the Gift mode option without having to beat the game in retry mode.

Once you've beaten the game the first time through you will unlock the retry mode. In this mode you will recieve four times as much exp and gold as the first time through. Then once you beat the game with retry mode you unlock gift mode. This is usefull only for the Ancient Dungeon, it allows you to select your party for the dungeon.

To defeat the Egg Dragon in less than one round, you only need: A healing item/spell and enough hit points to survive his attack.
First, you just heal him and then attack him once and he will die.
This is because he has max possible hp and the programmers forgot a hp-cap to prevent this.