History GeniusBonus / YuGiOh

** In particular, viewers may notice that the final duel between Jaden and Yubel closely mirrors a Jewish wedding ceremony. Elements include: The marriage contract (Spell Chronicle), the placing of the veil (Rainbow Veil), the bride circling the groom (Yubel's thorns), drinking from the cup of life (Air Hummingbird's effect), the seven blessings (Rainbow Neos), the breaking of the glass (Duel Academia's windows cracking), all culminating in Jaden and Yubel reaffirming their love as they're united forever by Super Fusion, before retreating away alone together like in the Yichud.

** Ib (Heart): Yuya, [[TheHeart the compassionate, friendly one]].
** Sheut (Shadow): Yuto, [[ByronicHero the dark, brooding one]].
** Ka (Vitality): Yugo, [[HotBlooded the energetic, passionate one]].
** Ba (Personality): Yuri, [[TheSociopath the sadistic, crazy one]], closest in personality to the boys' original self.
** Ren (Name): Zarc, the original identity bearing [[IKnowYourTrueName the group's true name]].

** Amnael's Alchemy deck contains six "Alchemy Beast" monsters and Golden Homunculus, reflecting the seven base metals that ancient world alchemists recognized. Meanwhile his Spell cards reference the four stages of the alchemical process, which each had their own name and associated color that are accurately represented by Amnael's cards. When he transitions to his Helios series (which have three forms of escalating power), it's a reference to Hermes Trismegistus, "thrice-greatest Hermes", the man who created the foundations of Hermeticism. Hermeticism teaches there are three parts to how the universe operates -- Alchemy, Astrology, and Theurgy (the study of how the Gods work and a type of magic that is counterpart to Goetia, the study of Demons). This symbolizes that Amnael has mastered Alchemy and Astrology, but the Sacred Beasts/Phantom Demons lie beyond his grasp.

* In the TCG, the naming scheme for the Traptrix monsters are all based on the scientific names of the plants and insects they are based on.

* GX has an amazing number of references to alchemical symbolism.

[[folder:''[=5D's=]'']]

* Each of Yuya's alter egos resembles one of the five parts of the soul from Egyptian mythology. Given the franchise's roots, this is likely intentional.

* GX has an amazing amount of references to alchemical symbolism.

* The names of the members of Yliaster -- Paradox, Aporia, and Antinomy -- are named after logical fallacies and impossibilities in Greek philosophy. Fitting given that Yliaster is trying to cause a TemporalParadox. Each name fits their role too.

** Firewall Dragon Darkfluid card is named after [[https://en.wikipedia.org/wiki/Dark_fluid Dark Fluid]], an alternative theory to both dark matter and dark energy which attempts to explain both phenomena in a single framework.

* The names of the members of Yliaster -- Paradox, Antinomy, and Aporia -- are named after logical fallacies and impossibilities in Greek philosophy. Fitting given the Yliaster is trying to cause a TemporalParadox. Each name fits their role too.

*** Then the monster that defeats Amnael is Electrum/Elixier, also a reference to alchemy, being the fusion of all four basic elementals to form the ultimate E-Hero, and named after both of alchemy's end goals: the creation of precious metals (electrum being an alloy of gold and silver), and the creation of the elixir of eternal life.

*** The monster that defeats him is Electrum/Elixier, also a reference to alchemy, being the fusion of all four basic elementals to form the ultimate E-Hero, and named after both of alchemy's end goals: the creation of precious metals (electrum being an alloy of gold and silver), and the creation of the elixir of eternal life.

** The monster that defeats him is Electrum/Elixier, also a reference to alchemy, being the fusion of all four basic elementals to form the ultimate E-Hero, and named after both of alchemy's end goals: the creation of precious metals (electrum being an alloy of gold and silver), and the creation of the elixir of eternal life.

* Amnael's Alchemy deck contains six "Alchemy Beast" monsters and Golden Homunculus, reflecting the seven base metals that ancient world alchemists recognized. Meanwhile his Spell cards reference the four stages of the alchemical process, which each had their own name and associated color that are accurately represented by Amnael's cards. When he transitions to his Helios series (which have three forms of escalating power), it's a reference to Hermes Trismegistus, "thrice-greatest Hermes", the man who created the foundations of Hermeticism. Hermeticism teaches there are three parts to how the universe operates -- Alchemy, Astrology, and Theurgy (the study of how the Gods work and a type of magic that is counterpart to Goetia, the study of Demons). This symbolizes that Amnael has mastered Alchemy and Astrology, but the Sacred Beasts/Phantom Demons lie beyond his grasp.

* In fact the series has an amazing amount of references to alchemical symbolism. For example, the motif of three suns that is a recurring element throughout the series: Amnael's ace monster, the triple suns two of the alternate worlds possess, and Nightshroud's black sun is a reference to one of the three.
* Each arc also represents a part of the alchemical process (though not necessarily in the correct order):
** Nigredo, the black, putrefying stage: Nightshroud's plot to break down humanity into a homogenous base form within his world of darkness.
** Albedo, the white, purifying stage: The Light of Destruction's desire to "purify" the world into white nothingness.
** Citrinitas, the yellow, awakening stage: Yubel awakening Judai's past and powers (giving him yellow eyes as the Supreme King).
** Rubedo, the red, completion stage: The fight over the sacred beasts and their ability to offer eternal youth, one of the end goals of alchemy. Also Judai being in the red dorm, representing his role as the ultimate alchemist.

* Episode 19~20 has Kyuando using a quiz gimmick, where the action cards require you to answer correctly to get a positive result. One of the questions was to prove UsefulNotes/FermatsLastTheorem, which wasn't proven until almost ''four hundred years'' after it was first proposed.

* The series also indulges heavily in symbology from Judaism. (What's the main characters original name again?) In particular, viewers may notice that the final duel between Jaden and Yubel closely mirrors a Jewish wedding ceremony. Elements include: The marriage contract (Spell Chronicle), the placing of the veil (Rainbow Veil), the bride circling the groom (Yubel's thorns), drinking from the cup of life (Air Hummingbird's effect), the seven blessings (Rainbow Neos), the breaking of the glass (Duel Academia's windows cracking), all culminating in Jaden and Yubel reaffirming their love as they're united forever by Super Fusion, before retreating away alone together like in the Yichud.

** Citrinitas, the yellow, awakening stage: Yubel's awakening of Judai's past and powers (giving him yellow eyes as the Supreme King).

** Firewall Dragon Darkfluid card is named after [[https://en.wikipedia.org/wiki/Dark_fluid Dark Fluid]], an alternative theory to both dark matter and dark energy in which it attempts to explain both phenomena in a single framework.

* Genome's obsession with DNA may look out of place in a group of programmers, but his deck is a shoutout to [[https://en.wikipedia.org/wiki/Genetic_algorithm Genetic Algorithms]], an algorithm inspired by Charles Darwin's theory of Natural Evolution that imitates the process of natural selection, and [[https://en.wikipedia.org/wiki/Genetic_programming Genetic Programming]], which in layman's terms, applies the algorithm to simulate breeding in programs via Darwinian evolution to find the most optical programs for the next generation, which also fits his superiority complex for DNA.

* Amnael's Alchemy deck contains six "Alchemy Beast" monsters and Golden Homunculus, reflecting the seven base metals that ancient world alchemists recognized. Meanwhile his Spell cards reference the four stages of the alchemical process, which each had their own name and associated color that are accurately represented by Amnael's cards. When he transitions to his Helios series (which have three forms of escalating power), it's a reference to Hermes Trismegistus, "thrice-greatest Hermes", the man who created the foundations of Hermeticism. Hermeticism teaches there are three parts to how the universe operates -- Alchemy, Astrology, and Theurgy (the study of how the Gods work and a type of magic that is counterpart to Goetia, the study of Demons). This symbolizes that Amnael has mastered Alchemy and Astrology, but the Sacred Beasts/Phantom Demons lay beyond his grasp.

* The series also indulges heavily in symbology from Judaism. (What's the main characters original name again?) In particular, viewers may notice that the final duel between Jaden and Yubel closely mirrors a Jewish wedding ceremony. Elements include, the marriage contract (Spell Chronicle), the placing of the veil (Rainbow Veil), the bride circling the groom (Yubel's thorns), drinking from the cup of life (Air Hummingbird's effect), the seven blessings (Rainbow Neos), the breaking of the glass (Duel Academia's windows cracking), all culminating in Jaden and Yubel reaffirming their love as they're united forever by Super Fusion, before retreating away alone together like in the Yichud.

* The series also indulges heavily in symbology from Judaism. (What's the main characters original name again?) In particular, viewers may notice that the final duel between Jaden and Yubel closely mirrors a Jewish wedding ceremony. Elements include, the marriage contract (Spell Chronicle), the placing of the veil (Rainbow Veil), the bride circling the groom (Yubel's thorns), drinking from the cup of life (Air Hummingbird's effect), the seven blessings (Rainbow Neos), the breaking of the glass (Duel Academia's windows cracking), all culminating in Jaden and Yubel reaffirming their love as they're united forever by Super Fusion, before retreating away together like in the Yichud.

* The series also indulges heavily in symbology from Judaism. (What's the main characters original name again?) In particular, viewers may notice that the final duel between Jaden and Yubel closely mirrors a Jewish wedding ceremony. Elements include, the marriage contract (Spell Chronicle), the placing of the veil (Rainbow Veil), the bride circling the groom (Yubel's thorns), drinking from the cup of life (Air Hummingbird's effect), the seven blessings (Rainbow Neos), the breaking of the glass (Duel Academia's windows cracking), all culminating in Jaden and Yubel reaffirming their love as they're united forever by Super Fusion, before retreating away together like the Yichud.

* The series also indulges heavily in symbology from Judaism. (What's the main characters original name again?) In particular, viewers have noticed that the final duel between Jaden and Yubel closely mirrors a Jewish wedding ceremony. Elements include, the Ketubah (Spell Chronicle), the placing of the veil (Rainbow Veil), the bride circling the groom (Yubel's thorns), drinking from the cup of life (Air Hummingbird's effect), the seven blessings (Rainbow Neos), the breaking of the glass (Duel Academia's windows cracking), all culminating in Jaden and Yubel reaffirming their love as they're united forever by Super Fusion, before retreating away together like the Yichud.

** Firewall Dragon's attack name is actually a cyber attack of a technology which work on the principle of intercepting electromagnetic radiation emissions from electronic devices such as monitors, hard disk and PC memory from a remote location, and allow the replay of the information captured. The technology name is called a Telecommunications Electronics Materials Protected from Emanating Spurious Transmissions or "TEMPEST" for short. So the attack on it is called a "Tempest Attack".

* Genome's obsession with DNA may look out of place in a group of programmers, but his deck is a shoutout to [[https://en.wikipedia.org/wiki/Genetic_algorithm Genetic Algorithms]], an algorithm inspired by Charles Darwin's theory of Natural Evolution that imitates the process of natural selection, and [[https://en.wikipedia.org/wiki/Genetic_programming Genetic Programming]], which in layman's terms, applies the algorithm to simulate breeding in programs via Darwinian evolution to find the most optical programs for the next generation.