GAME GENIE CODES: Ys 3 - Wanderers from Ys.
 No.  Code  Effect
   1  AACA-AA78  MASTER CODE-MUST BE ENTERED
   2  AM0T-AA5L + BD0T-AA42  Invincibility
   3  BD0T-AA42  Almost invincible
   4  HTVA-BAN2 + BJVA-AAE4  Start with 10 hit points
   5  HTVA-BAN2 + FAVA-AAE4  Start with 40 hit points
   6  HTVA-BAN2 + HTVA-AAE4  Start with 60 hit points
   7  HTVA-BAN2 + LAVA-AAE4  Start with 80 hit points
   8  HTVA-BAN2 + NTVA-AAE4  Start with 100 hit points
   9  HTVA-BAN2 + 9JVA-AAE4  Start with 250 hit points
 10  HTVA-BAN2 + 8TVA-ACE4  Start with 500 hit points
 11  HTVA-BAN2 + 72VA-AEE4  Start with 750 hit points
 12  HTVA-BAN2 + 66VA-AGE4  Start with 999 hit points
 13  HTVA-BAN2 + B6VA-ARN4  Start with 9,999 hit points -- Counter looks
 funny until you get below 1,000
 14  AWDA-AA5A  Makes all items cost nothing
 15  B4AA-AA3F  Make ring power recharge cost nothing
 16  RFWT-A6XT  Infinite ring power -- must charge the ring
 once before the code takes effect.
 17  GLAA-AAB0 + GK9T-AAFY  Recharge ring power to 50 instead of 255
 18  NWAA-AAB0 + NV9T-AAFY  Recharge ring power to 100
 19  8WAA-ACB0 + 8V9T-ACFY  Recharge ring power to 500
 20  74AA-AEB0 + 739T-AEFY  Recharge ring power to 750
 21  68AA-AGB0 + 679T-AGFY  Recharge ring power to 999

Note: Codes 22 thru 42 only work at the beginning of the game.
 22  RETT-A606 + 9TTT-BCR8 + VATT-BGHA  Start with experience of 5,000
 23  RETT-A606 + 9TTT-BCR8 + CATT-ARSA  Start with experience of 10,000
 24  RETT-A606 + 9TTT-BCR8 + XATT-BYSA  Start with experience of 15,000
 25  RETT-A606 + 9TTT-BCR8 + EATT-A61A  Start with experience of 20,000
 26  RETT-A606 + 9TTT-BCR8 + ZATT-AC9A  Start with experience of 25,000
 27  RETT-A606 + 9TTT-BCR8 + STTT-BFHA  Start with experience of 37,500
 28  RETT-A606 + 9TTT-BCR8 + LATT-AH1A  Start with experience of 50,000
 29  RETT-A606 + 9TTT-BCR8 + 96TT-B99A  Start with experience of 65.535
 30  AATT-AAHR  Start with 0 gold
 31  NTTT-AAHR  Start with 100 gold
 32  FTTT-ACHR  Start with 300 gold
 33  8TTT-ACHR  Start with 500 gold
 34  1TTT-AEHR  Start with 700 gold
 35  TTTT-AGHR  Start with 900 gold
 36  VATT-BGHR  Start with 5,000 gold
 37  CATT-ARSR  Start with 10,000 gold
 38  EATT-A61R  Start with 20,000 gold
 39  GATT-BL9R  Start with 30,000 gold
 40  JATT-B3HR  Start with 40,000 gold
 41  LATT-AH1R  Start with 50,000 gold
 42  96TT-B99R  Start with 65,535 gold

with codes 43 thru 46, the power ring has no effect.
 43  AH0A-BA3A + RH0A-A6VC  Make enemies harder to defeat
 44  KD0A-AH3A  Make enemies easier to defeat
 45  KD0A-AS3A  Make enemies very easy to defeat
 46  KD0A-AD3A  Make enemies extremely easy to defeat

Download The Big Book of Game Genie Codes.