MonsterSeed

		 Items Trick

At anytime during the game, check your stats and press R2,L1,R1,L2,R2,L1,R1,L2,L2. This trick will let you use the items you normally use on monsters. You can use them to increase your HP,Strength,Defense,etc.
Submitted by Fredricktt

See Ending

At the Title Screen, press L2,R1,L1,R2,L2,R1,L1,R2,R2.
Submitted by Fredricktt

Enable Monsters

At the shop where Monsters are sold, talk to the cashier, press R2,R1,L2,L1,R1,R2,L1,L2,L2. You will then be able to buy any monster in the game, including the characters.