Orphen

Restart battle:
Pause game play if defeat cannot be avoided during a battle. Select "Equip" and resume the game at the start of the battle, with all energy restored.

Hint: Regain health:
If you are running low on health, just shoot or attack the Electric elementals (small wavy line of electricity). They will go away and refill your health. They will reappear soon after that, allowing you to refill your health as many times needed.
Noodles.

Hint: Get Mar:
To get Mar to join your party at the start of the game, talk to everyone on deck, but do not let them join your team. Walk back to the cabin just before you enter Magnus and Cleo run up, say a few lines, and then the dragon will attack. After the fight Cleo will wake you up. You will hear a flute playing. Player mode will switch to Cleo and you will go up the cliff, past the waterfall, and on to Mar.
Robert Barkie.

Hint: Defeating Gaia:
Equip the Hand of Pyro and Bite of Lightning. Attack and destroy the two arms, then the white-orb. Block all the attacks Gaia does. Use Bite of Lightning to easily destroy the little robots Gaia throws at you. Do not call the Elemental Summon; you will not have enough time. When only the head remains, shoot Hand of Pyros at Gaia until he dies. Remember to block all attacks.
ginette bolduc.

Hint: Defeating the Mentor:
The Mentor takes some time to attack. As The Mentor raises its arms to attack you, run up to him. Attack him with your sword then quickly raise your shield. Repeat this as many time as needed. In between, use your shield. However, try not to use it too much or The Mentor will push you off the back.
little sexy.

Hint: Tower riddle:
When you have Mar in your party, you will go to a tower with a riddle. You must copy the music the stone frog makes the following order. Note: "F" stands for frog, and "X" indicates that you do not jump on that one.
koolkitty.

        4                            2
    1                 F                  x
        3                            x

Hint: See Sephy's underwear:
When playing as Sephy, go to a side view, then jump and pause game play.
Les Johnson.

Glitch: See through walls:
In story mode, walk up to a wall and press L1 or R1 to see through it.
Onekid93.