* This card's Japanese name, third artwork is based on its "Numbers 39: King of Wishes, Hopesealed form" ({{Ruby|Ｎｏ．|ナンバーズ}}３９ {{Ruby|希|き}}{{Ruby|望|ぼう}}{{Ruby|皇|おう}}ホープ ''Nanbāzu Sanjūkyū Kibōō Hōpu''), could be a reference to the myth of [[wikipedia:Pandora|Pandora]], a woman who opened a box that unleashed all sins upon the world, with the only thing remaining in the box being hope.** Fittingly, in from the ''[[Yu-Gi-Oh! ZEXAL]]'' anime and [[Yu-Gi-Oh! ZEXAL (manga)|manga]], after [[Yuma Tsukumo]] unleashed which appears during the "[[Number]]" cards, they twisted and/or amplified their sequences where it is [[Number holder|holders]]' desires, with this card being the only "Number" monster to remain in [[Astral]Xyz Summon]'s possession.** This card's Japanese [[Attack and effect names in Yu-Gi-Oh! ZEXAL|effect name]], "Moon Barrier" (ムーン・バリア ''Mūn Baria''), is based on the kanji 「{{Ruby|皇|おう}}」 (''Bō'', lit. "full moon") in this card's Japanese nameed.

* This cardmonster's Japanese name, "Numbers 39: King of Wishes, Hope" ({{Ruby|Ｎｏ．|ナンバーズ}}３９ {{Ruby|希|き}}{{Ruby|望|ぼう}}{{Ruby|皇|おう}}ホープ ''Nanbāzu Sanjūkyū Kibōō Hōpu''), is likely a reference to the myth of [[wikipedia:Pandora|Pandora]], a woman who opened a box that unleashed all sins upon the world, with the only thing remaining in the box being hope.** Fittingly, in the ''Yu-Gi-Oh! ZEXAL'' anime and [[Yu-Gi-Oh! ZEXAL (manga)|manga]], after [[Yuma Tsukumo]] unleashed the "[[Number]]" cards, they twisted and/or amplified their [[Number holder|holders']] desires, with this monster being the only "Number" monster to remain in [[Astral]]'s possession.** This monster's [[Attack and effect names in Yu-Gi-Oh! ZEXAL|effect name]] in the original Japanese version of the anime, "Moon Barrier" (ムーン・バリア ''Mūn Baria''), is based on the kanji 「{{Ruby|皇|おう}}」 (''Bō'', lit. "full moon") in its Japanese name. * This monster's ''[[TCG]]'' name, is based on a "[[wikipedia:Utopia|Utopiautopia]]", is a literary term used for a perfect society or community. The word originated with [[wikipedia:Thomas More|Sir Thomas More]], in his 1516 [[wikipedia:Utopia (book)|novel of the same name]].** In the book, More wrote a small segment describing the games played by the Utopians (people of Utopia): "They have, however, two games not unlike our chess. The one, a battle of numbers, in which number consumes number. The other, a contest between the virtues and vices, in which the discord among the vices themselves and their union against virtue is not unpleasantly represented".*** Fittingly, this describes the battle of the "Number" monsters in the ''Yu-Gi-Oh! ZEXAL'' anime and manga.

** This card monster has the same [[original ATK]] (2500) as the signature cards of the other main protagonists of the anime (with the exception of [[Yuga Ohdo]]'s "[[Sevens Road Magician (anime)|Sevens Road Magician]]"): [[Yugi Muto]]'s "[[Dark Magician (anime)|Dark Magician]]", [[Jaden Yuki]]'s "[[Elemental Hero Neos (anime)|Elemental HERO Neos]]", [[Yusei Fudo]]'s "[[Stardust Dragon (anime)|Stardust Dragon]]", [[Yuya Sakaki]]'s "[[Odd-Eyes Pendulum Dragon (anime)|Odd-Eyes Pendulum Dragon]]", [[Yusaku Fujiki]]'s "[[Firewall Dragon (anime)|Firewall Dragon]]" and [[Yudias Velgear]]'s "[[Galactica Oblivion (anime)|Galactica Oblivion]]".

** 2 Two [[retrained]] counterparts: "[[Number 39: Utopia Double]]" and "[[Number 39: Utopia Rising]]"

** 5 Five "[[Number C]]" forms via [[Xyz Evolution#Chaos Xyz Evolution|Chaos Xyz Evolution]]:

** 2 ** This is the only "Number" monster to have more than one "Number C" upgraded form.** Two "[[Number S]]" forms via [[Xyz Evolution#Shining Xyz Evolution|Shining Xyz Evolution]]:

** 2 Two upgraded forms via [[Xyz Evolution#Rank-Up Xyz Evolution|Rank-Up Xyz Evolution]]

* This is the first card to be printed in Astral glyphs, as well as the first [[Legal]] card to be printed in a fictional language. * This monster is the [[LIGHT]] counterpart of "[[Number 96: Dark Mist]]", like similar to how [[Number 96 (character)|Number 96]] is the dark counterpart of Astral.

* This card is the only "Number" monsters often take the form of their owner's initials ambitions in desires; in this monster's case, it represents Yuma Tsukumo and his determination to remain strong and never give up.** This monster's effect to [[negate]] a monster 's attack further reflects Yuma's determination to remain strong, as well as to have more than 1 "Number C" upgraded formprotect his friends.

* This cardmonster, "[[Gachi Gachi Gantetsu]]", and "[[Grenosaurus]]" were the first Xyz Monsters to be released in the ''TCG[[OCG]]''/''[[OCG]]TCG''.

* This card is the first Xyz Monster to be released as [[Gold Rare]] in the ''TCG'' (in ''[[Gold Series: Haunted Mine]]'').

* In the anime, this card monster reached the highest finite [[ATK]] (204,000) of all cardsmonsters, with the effects of "[[Number 100: Numeron Dragon (anime)|Number 100: Numeron Dragon]]" and "[[Number 73: Abyss Splash (anime)|Number 73: Abyss Splash]]" via the effect "[[Utopia Rising]]", as well as "[[Double or Nothing! (anime)|Double or Nothing!]]".

* This is the first card monster whose Korean name (No.39 유토피아 ''Neombeojeu Samsipgu Yutopia'', "No.39 Utopia") has the same naming scheme as both its Japanese and ''TCG'' and Japanese name. * This is the first card to be printed in Astral glyphs, as well as the first [[Legal]] card to be printed in a fictional language.