The following are known Game Genie Codes for Romancing SaGa 3 on Super Nintendo (SNES).

• Almost No Random Battles
  6DC7-EFD4
  Note: You can’t talk to people, or grab certain items that require you to press a button to do so with this code on. This lets you touch most enemies without fighting them. Some fish still seem to be able to attack.
• Get All Forms When You Enter The Form Menu
  EEDF-7FAB
  EEDF-74DB
  Note: This modifies some defaults, which are always written when you enter the menu. To be safe, turn off the codes after you’ve viewed the form menu.
• 1 Hit Kills Enemy
  EEFA-5D0C
• HP Level Up
  6D21-74D8
• Tech Level Up
  6D2F-5D08
• Weapon Levels Up Every Use
  6D21-5768
• Sell Any Item To Get Maximum Gold
  6DC7-57F5
• View Form Menu To Get 999 Max HP For All Characters In Party
  CBAB-72E8
  35AB-7378
  D7AB-7358
• Infinite Options In War
  DD03-5F03
  Note: If any option gets to 0, and you use it, it becomes truly infinite, even if the code is turned off afterwards.
• View Storage Items For Maximum of All Items In Storage
  DD53-5D91
  DD53-5721
• Infinite Storage Items
  82C2-5790
• Can Store Items Infinitely
  6D54-8DB1
  6D57-8FF1