Card Trivia:Sengenjin
- This monster appears in the artwork of "Counter Meowsure".
- This card's TCG name, "Sengenjin", is a portmanteau of its original Japanese name, Sennen Genjin, meaning "Millennium Primitive Man".
- According to this monster's flavor text, it carries Millennium Items. The golden weapons on this monster's back could be these Millennium Items, though they do not correspond with the seven from the original Yu-Gi-Oh! manga and anime.
- In some video games, this card is a Ritual Monster, with "Revival of Sennen Genjin" as its Ritual Spell Card.
- This card is one of three monsters with 2750 ATK, the other two being "Wingweaver" and "Evilswarm Ouroboros".
- This monster has appeared in every form of Yu-Gi-Oh! game outside the OCG/TCG, which includes Dungeon Dice Monsters, Capsule Monsters and Yu-Gi-Oh! Heroclix. This monster shares this distinction with "Blue-Eyes White Dragon", "Dark Magician", "Curse of Dragon", "Kuriboh", "Summoned Skull", "Celtic Guardian", "Gaia the Fierce Knight", "Mystical Elf", "Time Wizard", and "Sanga of the Thunder".
- This monster has a retrained counterpart in "The Caveman that Awoke after a Millennium".
