Password - Yugipedia - Yu-Gi-Oh! wiki

A password is the eight-digit number printed in the bottom-left corner on most OCG/TCG cards (certain cards, such as "Gate Guardian", do not have a password, and some cards instead have limitation text in this spot). The password for a card is always the same in all languages and all prints of that card, including alternate artwork versions, except for two ("Dark Magician" has an Arkana version, and "Polymerization" has an alternate artwork version, both with different passwords from their main versions). Because of this consistency, passwords can be useful for identifying cards.

Soul Hunter (FMR), Yu-Gi-Oh! Wiki

Password - Yugipedia - Yu-Gi-Oh! wiki

Packet Link - Yugipedia - Yu-Gi-Oh! wiki

Onikuji - Yugipedia - Yu-Gi-Oh! wiki

Link Decoder - Yugipedia - Yu-Gi-Oh! wiki

Rainbow Dragon - Yugipedia - Yu-Gi-Oh! wiki

Battleguard Cadet - Yugipedia - Yu-Gi-Oh! wiki

Labyrinth Wall Shadow - Yugipedia - Yu-Gi-Oh! wiki

Yusei Fudo, Yu-Gi-Oh! Wiki

Signer Dragon, Yu-Gi-Oh! Wiki

Fairy Box - Yugipedia - Yu-Gi-Oh! wiki

Alternate password - Yugipedia - Yu-Gi-Oh! wiki

Triamid Pulse, Yu-Gi-Oh! Wiki

Yugi Muto, Yu-Gi-Oh! Wiki

Golden Rule - Yugipedia - Yu-Gi-Oh! wiki