Activating this trainer

If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Trainer Options

# Team Combat 
     NumPad1: Unlimited HP
     NumPad2: Unlimited Mana

# Enemies 
     NumPad3: Weak Enemies

# Inventory 
     NumPad4: Unlimited Use Consumables
     NumPad5: Obtain All Consumable Items in Menu
     NumPad6: Obtain All Skill Cards

# Items Needed 
     NumPad7: Easy Open Chests

# Gameplay 
     NumPad8: Game Speed

Editor Options

# Resource 
     Yen

# Time and Date 
     Month and Day value 5-371
     Time value 2-9
     Next Month and Day value 5-371
     Next Time value 2-9

# Social Stats 
     Academic
     Charm
     Courage

# Selected Unit Stats 
     Current HP
     Current SP
     Level
     EXP

# Selected Unit Stats Persona 
     Type
     Level
     EXP
     ST
     MA
     EN
     AG
     LU

# Selected Persona Stats  
     Type
     Level
     EXP
     ST
     MA
     EN
     AG
     LU

Notes

Save often!  Doing things you aren't supposed to be able to do to this game, such as going back or forward in time could have unintended results or break scripts.

Yen:
Press TAB to enter MENU

Month and Day value 5-371:
You can rewind or do all sorts of things UNINTENDED by the game.  Make sure you have SAVES before toying around with the game date and time.

Academic:
Press TAB to enter MENU, then STATS, then SELECT YOUR UNIT, then select SOCIAL STATS

Current HP:
Press TAB to enter MENU, then STATS, then SELECT the UNIT you wish to see.

Type:
Press TAB to enter MENU, then STATS, then SELECT the UNIT you wish to see.  For YOUR player, this will show Persona 1 only.

Type:
Press TAB to enter MENU, then PERSONA, then select the PERSONA you wish to edit then select STATS.