The following are known Game Genie Codes for Dragon Warrior on Nintendo Entertainment System (NES).

• Walk Thru Walls
  AVVLLPSA
• Infinite Magic Power
  SXOIVLSA
• Take No Damage In Swamp
  AEVGUIZA
• Start With 256 Gold Coins
  VVOYYTSA
• All Spells Use Only One Magic Point
  VKOIVLSA
• Barriers Cause Half Usual Damage
  YAKKEVYA
• Infinite HP During Most Battles!
  SZUTXISA
• Infinite Magic Keys!
  SXXSEGVG
• Infinite Herbs Outside of Battle!
  SXNIVGVG
• Infinite Herbs During Battle!
  SXSVZYVG
• Casting Spells Increase Maximum MP
  TXOIVLSA
• Always Have An Excellent Hit
  ZTZTLT
• Have Princess Rescued/Have Various Spells
  STVLXZPE
• Start With Queen, Some Items, And Keys
  VVOYYTSA
• Start Game With 65,535 Gold, Level 30, Nine Herbs, Magic Key, Edrick’s Sword And Armor, Silver Shield (Go Upstairs And You Will See The Game’s Ending)
  VVPYAT
• Start Game At Level 6, 255 HP, Heal, And Hurt Spell
  VVPYZT
• Start Game With Hurtmore, Princess Saved, Four Silver Harps, Eight Herbs And Magic Keys, Flame Sword, Magic Armor, And Large Sword, Level 29, 65,535 Gold, 65,280 Exp., Max HP. 200, And 218 MP
  VVPYLT
• Start At A Higher Level
  LPINZA
• People Stand In Walls
  AAAULA
• Screen Moves Weird When You’re Hit In Battle
  SALVOS
• Weird Words In Battle
  NAZUGV
• People Stand In Diagonal Rows In Towns
  EAAULA
• Erases All Saved Games (Turn Off NES And Turn It Back On To Retrieve)
  UPINXE
• Items In Weapon And Armor Shops That Are Less Than $255 Are Free (As Long As You Have Enough Gold)
  SXNSLISA
• Items In Tool Shops That Are Less Than $255 Are Free As Long As You Have Enough Gold
  SZESAYSA
• All Items In Tool Shops Are Free As Long As You Have Enough Gold (May Not Work At All Shops)
  SZESAYSA
  SZESGYSA
• Staying At Inns Costs Nothing (May Not Work At All Inns)
  SXKSUASA
• Takes Away The Sound Of Scrolling Letters When Talking To Someone In The Game
  ONTAIO
• People Move Around Fast, And A Lot Of People Are In Different Places
  VITOAN
• Enemies Dodge Your Every Move
  GNATAT
• Our Little Hero Has Had A Little Too Many Medical Herbs
  TAGUZG
• The Arrow On The Command Menu Slices Through The Commands
  ULXZOP
• Messes Up The Intro Menus
  ZZZZZZ
• Weird Music Mode
  GKIAIO
• Weird Music Mode But Faster Music
  AKIAIO
• Takes Out The Bass Part Of Music (Game Crashes When You Win A Battle)
  GAIAIO
• Plays The Music Much Higher
  GOIAIO
• REALLY Bad Music!
  GXIAIO
• REALLY REALLY Bad Music!
  GUIAUI
• When You Select Anything But Message Speed, The Menu Returns You To The Intro Screen
  GGIAIO
• Really Demonic Sounding Low Music
  GSIAIO
• Low Sounding, Barbershop Quartet Style Music (Battles Freeze The Game)
  GVIAIO
• Different Sounding Music (Game Freezes When You Win A Battle)
  GNIAIO
• Spells Use Up 0 Magic Points
  SKOIVLSA
• No Enemies In Caves
  AKPOOA
• Towns Look Flooded, And Land Looks Snowy
  GIAKIE
• You Only Need To Hit An Enemy Once To Kill It (Does Not Always Work)
  YLTTOP
• No Writing
  NLLLTT
• Walk Through Walls In Some Towns
  KISKIS
• Walk Through Some Walls
  VKVLLP
• Everytime You Bring Up The Subscreen You Get A Better Shield, Armor, And Weapon
  VTUZOP
• Ex. Points Goes Up 255 Everytime You Kill Something (This Code Messes Up The Screen A Little)
  LLVLOP
• Bring Back Old Caricature
  EAAKOX
• Goloman Is Everywhere
  SAAKOV
• Start New Game With 255 Energy
  EAAKOZ
• Never Leave Castle, Walk On Grass
  YYLLLX
• Gain More Gold From First Treasure Chest
  AATVLL
• Enemies Are Very Strong
  LUUVZI
• Excellent Hit Everytime
  ZTZTLT
• Get About $85 Gold When You Battle Slimes (Instead Of Only $1 Gold)
  LTSPXTZA
• Get About $200 Gold When You Battle Slimes (Instead Of Only $1 Gold)
  NYSPXTZE
• Get About $85 Gold When You Battle Red Slime’s (Instead Of Only $2 Gold)
  LTVPXTLA
• Get About $200 Gold When You Battle Red Slimes (Instead Of Only $2 Gold)
  NYVPXTLE
• Get About $85 Gold When You Battle Drakees (Instead Of Only $2 Gold)
  LTNPXTLA
• Get About $200 Gold When You Battle Drakees (Instead Of Only $2 Gold)
  NYNPXTLE
• Buy Bamboo Poles For Free (Instead Of $10)
  AAKPNOZA
• Buy Clubs For Free (Instead Of $60)
  AAKOOOGL
• Buy Copper Swords For Free (Instead Of $180)
  AAKOUPKL
• Buy Hand Axes For $48 (Instead Of $560)
  AAKOVPZA
• Buy Broad Swords For $220 (Instead Of $1500)
  AASPEPIA
• Buy Broad Swords For Free (Instead Of $1500)
  AASPEPIA
  AAKONOKI
• Buy Flame Swords For $72 (Instead Of $9800)
  AASPXPTZ
• Buy Leather Armor For Free (Instead Of $70)
  AASPNPTG
• Buy Chain Mail For $44 (Instead Of $300)
  AASOXPPA
• Buy Half Plates For $232 (Instead Of $1000)
  AASOKPLA
• Buy Half Plates For Free (Instead Of $1000)
  AASOKPLA + AASOUOET
• Buy Full Plates For $184 (Instead Of $3000)
  AASOVOLA
• Buy Magic Armor For $20 (Instead Of $7700)
  AAVPEOTP
• Buy Small Shields For Free (Instead Of $90)
  AAVPUOZI
• Buy Large Shields For $32 (Instead Of $800)
  AAVPVPLA
• Buy Silver Shields For $208 (Instead Of $14,800)
  AAVOEOPL
• Buy Silver Shields For Free (Instead Of $14,800)
  AAVOEOPL
  AAVPNPEI
• Buy Herbs For Free (Instead Of $24)
  AAVOOOAP
• Buy Torches For Free (Instead Of $8)
  AAVOSOAA
• Buy Dragon’s Scale For Free (Instead Of $20)
  AANPUPGP
• Lets You Buy ERDRICK’S SWORD (The Best Weapon In The Game) At The Weapon Shop In The Town of Brecconary, And It Only Costs $2
  TEOPNPAA
• Lets You Buy ERDRICK’S ARMOR (The Best Armor In The Game) At The Weapon Shop In The Town of Brecconary, And It Only Costs $2
  IEOOXPYE
• Move Up To Level 2 After Your Very First Battle
  PASNILYA
• Move Up To Level 3 After Your Very First Battle
  AASNILYA
  PASNYLYP
• Move Up To Level 4 After Your Very First Battle
  AASNILYA
  AASNYLYP
  PAVYPUYZ
• Get 60 Experience Points When You Battle Slimes (Instead Of Only 1)
  GLSPOTPE
• Get 125 Experience Points When You Battle Slimes (Instead Of Only 1)
  IYSPOTPE
• Get 255 Experience Points When You Battle Slimes (Instead Of Only 1)
  NYSPOTPE
• Get 60 Experience Points When You Battle Red Slimes (Instead Of Only 1)
  GLVPOTPE
• Get 125 Experience Points When You Battle Red Slimes (Instead Of Only 1)
  IYVPOTPE
• Get 255 Experience Points When You Battle Red Slimes (Instead Of Only 1)
  NYVPOTPE
• Get 60 Experience Points When You Battle Drakees (Instead Of Only 2)
  GLNPOTZE
• Get 125 Experience Points When You Battle Drakees (Instead Of Only 2)
  IYNPOTZE
• Get 255 Experience Points When You Battle Drakees (Instead Of Only 2)
  NYNPOTZE
• Slime Leaves 255 Experience
  NYSPOTPE
• Slime Leaves Up to 254 Gold
  NYSPXTZE
• Red Slime Leaves 255 Experience
  NYVPOTPE
• Red Slime Leaves Up to 254 Gold
  NYVPXTLE
• Drakee Leaves 255 Experience
  NYNPOTZE
• Drakee Leaves Up to 254 Gold
  NYNPXTLE
• Ghost Leaves 255 Experience
  NNEPOTLE
• Ghost Leaves Up to 254 Gold
  NNEPXTIE
• Magician Leaves 255 Experience
  NNOPOTGE
• Magician Leaves Up to 254 Gold
  NNOPXVGE
• Magidrakee Leaves 255 Experience
  NNXPOTIE
• Magidrakee Leaves Up to 254 Gold
  NNXPXVGE
• Scorpion Leaves 255 Experience
  NNUPOTTE
• Scorpion Leaves Up to 254 Gold
  NNUPXTAO
• Druin Leaves 255 Experience
  NNKPOTYE
• Druin Leaves Up to 254 Gold
  NNKPXTAO
• Poltergeist Leaves 255 Experience
  NNSPOVAE
• Poltergeist Leaves Up to 254 Gold
  NNSPXTZO
• Droll Leaves 255 Experience
  NNVPOVZE
• Droll Leaves Up to 254 Gold
  NNVPXVPO
• Drakeema Leaves 255 Experience
  NNNPOVLE
• Drakeema Leaves Up to 254 Gold
  NNNPXTGO
• Skeleton Leaves 255 Experience
  NYEPONLE
• Skeleton Leaves Up to 254 Gold
  NYEPXNTO
• Warlock Leaves 255 Experience
  NYOPONIE
• Warlock Leaves Up to 254 Gold
  NYOPXYLX
• Metal Scorpion Leaves 255 Experience
  NYXPONTE
• Metal Scorpion Leaves Up to 254 Gold
  NYXPXNAX
• Wolf Leaves 255 Experience
  NYUPOYAO
• Wolf Leaves Up to 254 Gold
  NYUPXYZU
• Wraith Leaves 255 Experience
  NYKPOYPO
• Wraith Leaves Up to 254 Gold
  NYKPXNGU
• Metal Slime Leaves 255 Experience
  NYSPOYLN
• Metal Slime Leaves Up to 254 Gold
  NYSPXYTE
• Specter Leaves 255 Experience
  NYVPOYZO
• Specter Leaves Up to 254 Gold
  NYVPXYTK
• Wolflord Leaves 255 Experience
  NYNPOYGO
• Wolflord Leaves Up to 254 Gold
  NYNPXYAS
• Druinlord Leaves 255 Experience
  NNEPOYGO
• Druinlord Leaves Up to 254 Gold
  NNEPXYIS
• Drollmagi Leaves 255 Experience
  NNOPOYTO
• Drollmagi Leaves Up to 254 Gold
  NNOPXNPS
• Wyvern Leaves 255 Experience
  NNXPONAO
• Wyvern Leaves Up to 254 Gold
  NNXPXYGU
• Rogue Scorpion Leaves 255 Experience
  NNVPONZO
• Rogue Scorpion Leaves Up to 254 Gold
  NNUPXNTV
• Wraith Knight Leaves 255 Experience
  NNKPONGO
• Wraith Knight Leaves Up to 254 Gold
  NNKPXNAN
• Golem Leaves 255 Experience
  NNSPOYIE
• Golem Leaves Up to 254 Gold
  NNSPXNZE
• Goldman Leaves 255 Experience
  NNVPOYTE
• Goldman Leaves Up to 254 Gold
  NNVPXNEK
• Knight Leaves 255 Experience
  NNNPOYPX
• Knight Leaves Up to 254 Gold
  NNNPXYXE
• Magiwyvern Leaves 255 Experience
  NYEZPAZX
• Magiwyvern Leaves Up to 254 Gold
  NYEZZEKE
• Demon Knight Leaves 255 Experience
  NYOZPAIX
• Demon Knight Leaves Up to 254 Gold
  NYOZZAVO
• Werewolf Leaves 255 Experience
  NYXZPEAX
• Werewolf Leaves Up to 254 Gold
  NYXZZEVO
• Green Dragon Leaves 255 Experience
  NYUZPEIX
• Green Dragon Leaves Up to 254 Gold
  NYUZZAEX
• Starwyvern Leaves 255 Experience
  NYKZPELX
• Starwyvern Leaves Up to 254 Gold
  NYKZZAEX
• Wizard Leaves 255 Experience
  NYSZPAZU
• Wizard Leaves Up to 254 Gold
  NYSZZASX
• Axe Knight Leaves 255 Experience
  NYVZPATU
• Axe Knight Leaves Up to 254 Gold
  NYVZZASX
• Blue Dragon Leaves 255 Experience
  NYNZPEGU
• Blue Dragon Leaves Up to 254 Gold
  NYNZZAVO
• Stoneman Leaves 255 Experience
  NNEZPAPK
• Stoneman Leaves Up to 254 Gold
  NNEZZEKE
• Armored Knight Leaves 255 Experience
  NNOZPATK
• Armored Knight Leaves Up to 254 Gold
  NNOZZEKE
• Red Dragon Leaves 255 Experience
  NNXZPAGV
• Red Dragon Leaves Up to 254 Gold
  NNXZZEKE