Card Trivia:Ancient Gear Golem
- This is the cover card of The Lost Millennium.
- This monster appears in the artworks of "Ancient Gear Advance", "Ancient Gear Catapult", "Ancient Gear Inspection", "Ancient Gear Scrap Fusion", "Cross-Dimensional Duel", and "Stonehenge Shield".
- This monster is based on a golem, an animated guardian made from earthen materials, refleced by its EARTH Attribute.
- This monster has the following forms:
- A downgraded form: "Ancient Gear Frame"
- A retrained counterpart: "Ancient Gear Dark Golem"
- A signature move counterpart: "Ancient Gear Golem - Ultimate Pound"
- A "Toon" counterpart: "Toon Ancient Gear Golem"
- Two upgraded Fusion forms: "Ultimate Ancient Gear Golem" and "Ancient Gear Megaton Golem"
- This is the first "Ancient Gear" monster.
- This monster, as one of the original five "Ancient Gear" monsters (along with "Ancient Gear Beast", "Ancient Gear Cannon", "Ancient Gear Engineer", and "Ancient Gear Soldier") has an equal original ATK and DEF (3000).
- In the anime, this card was so extremely rare that by the time of Yu-Gi-Oh! 5D's, this card had not been seen in living memory until it appeared in Yu-Gi-Oh! 5D's episode Lessons Learned".
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- Its rarity was such that it was often referred as a "legendary card", while also being overall considered as a very powerful card.
- This card's TCG Spanish name was printed in some sets as "Golem de Mecanismo Antiguo", while in other sets this card was named "Gólem de Mecanismo Antiguo".
- The icon for Machine monsters in Yu-Gi-Oh! 5D's Duel Transer is based on this monster.