- Gauntlet Launcher
- Gauntlet Warrior
- Gazelle the King of Mythical Beasts
- Gear Changer
- Gear Golem the Moving Fortress
- Gearfried the Iron Knight
- Gearfried the Swordmaster
- Gemini Imps
- Genghis Ghan the Emperor Dragon
- Genin
- Gentlemander
- Gernia
- Ghost Gardna
- Giant Axe Mummy
- Giant Germ
- Giant Orc
- Giant Rat
- Giant Red Seasnake
- Giant Rex
- Giant Scorpion of the Tundra
- Giant Soldier of Stone
- Giant Ushi Oni
- Giga-Tech Wolf
- Gigaplant