In chemistry, polymerization is the process of fusing two or more molecular units into larger chains of units called polymers. This is similar to Yu-Gi-Oh! as two or more monsters are being combined to form a new, stronger monster.
The alternate art was used in the dub of the Yu-Gi-Oh anime.
There is an original art "Polymerization" card with altered artwork in the center of the two monsters moving towards it, referencing how the card works.
The alternate artwork of this card is the only card to feature an image of itself in its own artwork (The "Polymerization" card fusing the monsters together).
Despite the alternate artwork being edited, the "Polymerization" card in the alternate artwork was left untranslated.
This card has the most errata of any card in the OCG, with eight different erratas.
This card is one of the few cards whose errata made the text longer. The new, lengthened, text explains exactly what to do for a Fusion Summon, while the original text explained what was happening during a Fusion Summon but did not explain how to conduct one.
This is one of two cards to have appeared in every Yu-Gi-Oh! anime series and film, the other being "Mystical Space Typhoon". Of the two, this is the only one to have been played in all of them.