Final Fantasy I Mini-game:
While on board the ship hold X and press O 55 times. This will open a little puzzle game. Complete the puzzle in under 2 minutes to get 10,000 gil, 4 minutes for 5,000 gil or 6 minutes for 2,000 gil.

Playing Concentration (FF2):
While in the Snowcraft, hold X and press Circle 15-20 times This will open up Concentration. Play the first round and write down all positions of the cards, then cancel the game. Start a game and cancel it 31 times, then on the 32nd time the game will be back to the configuration you started with. Use the positions you wrote down on the first game to win quickly. You can get 40,000 gil, an elixir, and a Phoenix Down.

Quick Magic Level Up (FF2):
This glitch allows you to level up your magic quickly and without spending ANY MP. Make sure that the characters whose magic you wish to level up are NOT in the 4th (bottom) slot. Enter a battle. As soon as your character gets their turn, choose the magic you wish to level up and select a target for the magic (it doesn\'t matter what target). Then hit X to go on to the next character. You should see the character that is going to perform the magic begin what I assume is an incantation of sorts. You should now be on to the NEXT character\'s battle choice screen. Hit O and return to the previous character, this will cancel their magic and allow you to choose it again. Every time you choose magic, select a target, and go on to the next character you earn the 2-3 points towards the next level of magic. Cancelling the magic DOESN\'T take away the points. This way you can level up your characters\' magic abilities without spending any MP or alot of time casting and re-entering battles to cast again. (the leveled up character cannot be in the fourth slot because as soon as you choose the target for the last character's magic, it begins the round's actions, which would force you to wait for the next round to do the cheat again)