Extra Storage You can use the chest in the Blacksmith's Shop to store extra items.  Random Chest Item Cheat Just before you open a chest, save the game. Then open the chest. If you did not get an item you wanted, restart from your save and try again. Most of the items are random. 

Gameshark Codes

[M] Must Be First 9C5D88F8
[M] Must Be Last 245EECA9

Quick Level Gain - Hero A54C2AC605F5E0FF

Inf. HP - Hero 38EEE47C0000270F   FB74F2240000270F
Inf. MP - Hero 864C31540000270F   C7FABC0B0000270F

Max Damage - Hero B91F87A40000270F
Max Armor - Hero 47CA830D0000270F
Max Durability - Hero DB0AD08F0000270F
Max Parry - Hero 66CDAD9C0000270F

Infinite Mith 330F647205F5E0FF