Card Trivia:Ultimaya Tzolkin
- This monster is based on the true form of the Ultimate God entity in the Yu-Gi-Oh! 5D's manga, which is also the first Dark Synchro Monster to appear in the manga.
- This monster can be considered the manga counterpart of "Crimson Dragon", which is based on the Crimson Dragon from the Yu-Gi-Oh! 5D's anime.
- This monster's OCG/TCG Summoning conditions are based on its appearance in the Yu-Gi-Oh! 5D's manga, where it requires a Dark Tuner monster and non-Tuner monster of the same level that are at least Level 5 or higher. During its first appearance in Yu-Gi-Oh! 5D's Ride 59: "The Final Showdown!!", this monster was Dark Synchro Summoned using two copies of the Level 8 "Wicked Acolyte Chilam Sabak", with one copy treated as a Dark Tuner monster.
- This monster's name may be derived from Tzolk'in, the basic cycle of the Mesoamerican Maya calendar that figures preeminently in the society and rituals of the ancient and modern Maya peoples.
- This monster has an evolved form: "Phantasmal Lord Ultimitl Bishbaalkin".
- This monster has a Link counterpart: "Duel Link Dragon, the Duel Dragon".
- This is the first Synchro Monster that cannot be Synchro Summoned.
- This is the first Level 0 Monster Card, and the second monster (other than a Token) to be printed with 0 Level/Rank "stars" after "Number F0: Utopic Future".
- Due to its OCG/TCG effect, this monster cannot Summon all of the Duel Dragons with its effect. It cannot Summon "Ascension Sky Dragon", "Beelzeus of the Diabolic Dragons" and "Dragocytos Corrupted Nethersoul Dragon" (which are Level 10), or "Dragonecro Nethersoul Dragon" (which is a Fusion Monster); however, it can Summon all of the Signer Dragons and their Duel Dragon counterparts.
- This card's OCG/TCG artwork is taken from the aforementioned chapter, specifically from the panel showing this monster being Summoned.