All Elemental upgrades and All Armors:
     Pause the game then hold L1 and press the Left Analog-stick Left, 
     Up, Down, Up, Right. 

Infinite Health:
     Pause the game then hold L1 and press the Left Analog-stick Right, 
     Right, Down, Down, Left. 

Infinite Mana/Breath:
     Pause the game then hold L1 and press the Left Analog-stick Up, 
     Right, Up, Left, Down. 

Max experience points:
     Pause the game then hold L1 and press the Left Analog-stick Up, 
     Left, Left, Down, Up.