Card Trivia:Gaia The Fierce Knight
- Either this monster or "Swift Gaia The Fierce Knight" appears in the artworks of "Baton of the Hero", "Hero's Guild", "Monster Convocation", and "Spiral Spear Strike".
- This monster appears in the artwork of "Super Soldier Ritual".
- This card has several retrained counterparts:
- Four Effect Monsters: "Arisen Gaia the Fierce Knight", "Charging Gaia the Fierce Knight", "Lord Gaia the Fierce Knight", and "Swift Gaia the Fierce Knight".
- A Rush Duel counterpart: "Veteran Gaia the Fierce Knight".
- Three Fusion Monsters: "Gaia Drake, the Universal Force", "Gaia the Dragon Champion", and "Sky Galloping Gaia the Dragon Champion".
- One Synchro Monster: "Gaia Knight, the Force of Earth"
- One Xyz Monster: "Gaia Dragon, the Thunder Charger"
- One Link Monster: "Gaia Saber, the Lightning Shadow"
- This monster has a counterpart for almost every type of Monster Card.
- If one counts "Black Luster Soldier" (explained below), "Gaia" has a counterpart for every type of Monster Card.
- In the original Yu-Gi-Oh! manga and some of the video games, this card is required to Ritual Summon "Black Luster Soldier".
- This would later be expanded upon with the relationship between the "Gaia" and "Black Luster Soldier" archetypes in the OCG/TCG.
- The Bandai version of this card is Level 6, has a blue horse and 1600 DEF, the Konami card is Level 7, has a violet horse and 2100 DEF.
- This monster can be seen on Pharaoh Atem's side of the field on the Tablet of Lost Memories.
- In the Yu-Gi-Oh! Toei anime, this monster's horse was colored brown.
- This card's first OCG/TCG artwork is taken from Yu-Gi-Oh! Duel 37: "To the Death!!", specifically from the panel showing this monster being Summoned.
- This card's second OCG artwork is taken from Yu-Gi-Oh! Duel 118 (Duelist Duel 59): "The Legendary Swordsman", specifically from the panel in which this monster undergoes the effect of "Black Luster Ritual" to become "Black Luster Soldier".