The ports (GBC and SNES ) of Dragon Warrior III differ in graphics. The GBC version also has Monster Medals, which the SNES version does not. Various class, item, and enemy names differ between all three versions.
Differences from the NES version
Graphic overhaul (all sprites are different).
Thief class .
About 80 addtional weapons and armor .
Bonus dungeon with 8 new Monster and Boss
Pachisi board game.
Personalities .
Tiny/Small Medals.
Pots, barrels, bookshelves, etc can now be searched.
Climb into wells.
Bag added which acts as a vault.
Names of characters and bag can be changed at Tower of Dharma.
New spells added for Merchants and Jesters.
Some monsters have their stats and drop changed.
Boss Troll is no longer a random encounter.
Monster Medals (GBC only).
Second bonus dungeon for GBC with bosses and mimics.
Naming differences
For enemy differences, see Dragon Warrior III/Enemies .
Class differences
NES
GBC
SNES
Goof-Off
Jester
Jester
Merchant
Dealer
Dealer
Pilgrim
Cleric
Cleric
N/A
Thief
Thief
Wizard
Mage
Mage
Item differences
NES
GBC
SNES
Agility Seed
AGLseed
Agility Seed
Antidote Herb
Antidote
Antidote Herb
Fairy Water
Repellent
Holy Water
Full Moon Herb
MoonHerb
Full Moon Herb
Invisibility Herb
Hide Herb
Invisibility Herb
Luck Seed
LUCKseed
Luck Seed
Medical Herb
Herb
Medical Herb
Poison Moth Powder
BugPowder
Poison Moth Powder
Spider's Web
SpiderWeb
Spider's Web
Strength Seed
STRseed
Strength Seed
N/A
TinyMedal
Small Medal
Vitality Seed
VITseed
Vitality Seed
Wing of Wyvern
WarpWing
Wing of Wyvern
Wayfarer's Clothes
?
Traveler Clothes
Leather Helmet
?
Leather Hat
Half Plate Armor
?
Iron Armor