Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.
Numpad 1: Unlimited Health
Numpad 2: Unlimited AP
Numpad 3: Easy Kills
Numpad 4: Mega Gil
Numpad 5: SP Points
Numpad 6: Freeze Play Timer
Numpad 7: Battle Items Multiplier
Numpad 8: Unlimited Miscellany Items Use
Numpad 9: Unlimited Battle Items Use
Numpad 1: Unlimited Health - toggle on and your health remains full. Note that if you attack creatures that can deal thousands of damage and you are a pathetic max health, you can still be one-shot killed by the enemies, so keep that in mind.
Numpad 2: Unlimited AP - toggle on and the trainer tries to keep your AP from reaching zero.
Numpad 3: Easy Kills - press while it's your turn to attack, and it will set one of the enemy targets to very low health, in most cases allowing you to kill it quickly. If you are trying to capture the enemy, then it's best not to use this option.
Numpad 4: Mega Gil - while at the menu where you can see your Gil, press this to give you plenty.
Numpad 5: SP Points - toggle on and enter the Mirage Boards. You have plenty to level up your Mirages.
Numpad 6: Freeze Play Timer - toggle on and when you enter the menu, you will see the Play Timer has frozen.
Numpad 7: Battle Items Multiplier - toggle this on then enter Items, then Battle Items menu. You will see you have plenty of each battle item that you had in your inventory.
Numpad 8: Unlimited Miscellany Items Use - toggle this on and then when you use an item from the Miscellany Items menu, such as a Seraphone, it won't decrease when used.
Numpad 9: Unlimited Battle Items Use - toggle this on and then when you use an item from the Battle Items menu, such as a Potion, it won't decrease when used.
Unlock more trainer options including updates from here - World of Final Fantasy Trainer