How do you beat Final Fantasy 1 on psp?

To beat Final Fantasy I on the PSP, focus on leveling up your characters by grinding in various dungeons and areas, particularly before major boss fights. Equip your party with the best weapons and armor available, and use magic strategically, especially healing spells during battles. Pay attention to elemental weaknesses of enemies and utilize items effectively. Finally, be prepared for the final boss by ensuring your party is well-equipped and at a high enough level, typically around level 30 or higher.