Synchronization

Synchronization is the term used to refer to the state of mind that Yūya and his dimensional counterparts enters.

Effects
This ability causes Yūya and his dimensional counterparts to sync with each other, causing them to adopt some mannerisms of the other, including speaking and moving in the same manner depending on which counterpart that got synchronized. Their consciousnesses are transferred into the counterpart that initiated it and gradually, the users lose the ability to distinguish their identities from each other and begin to act as the same person. When they regain their senses, the people involved generally do not know that they have synchronized. However, they retain their memories of the Duel, as Yūya remembers what happened in the Duel between Yūgo and Serena. Since they experienced synchronisation only through their minds, the ones who got synchronised, not including the one who initiated it, may only thought of it as a dream. This state usually triggered subconsciously when their Four Dimension Dragons called one another, but this can be forcefully triggered if something pushed their state of minds into turmoil. This usually also triggered the Berserk Mode.

History
The first instance of Synchronization happened between Yūto and Yūgo in their rematch. Both of their Dragons, "Dark Rebellion Xyz Dragon" and "Clear Wing Synchro Dragon" respectively, called out to one another the moment both were on field and this triggered both Yūto and Yūgo's Berserk Mode.

Yūya and Yūgo during the Friendship Cup, and was triggered when Yūya picked up his "Odd-Eyes Pendulum Dragon" card after "Clear Wing Synchro Dragon" was Summoned. Both Yūya and Yūgo exhibited certain traits of the other user during the phenomenon. Shingo Sawatari and Yuzu Hīragi was able to notice Yūya's behaviour within Yūgo in the Duel.

Later, Yūgo's Summoning of "Clear Wing Synchro Dragon" in his Duel with Serena once again caused Yūya to sync with him, transferring his awareness into Yūgo's body. The sync is broken with the conclusion of the Duel, with Yūya remembering the Duel and as a result becoming aware of the ability.

In the Duel between Yūya and Crow, Roger's mind-control chip not only forcefully triggered the Berserk Mode, but also synchronised him with his dimensional counterparts. While in sync with Yūya, Yūgo and Yūri gained dark auras around themselves. When Yūya won the Duel, the sync broke, with him and his counterparts passing out with the chip destroyed in the process.

When Yūri, the Obelisk Force, and Yūgo arrived at Yūya's location during his Duel with Barrett, Yūgo and Yūri summoned "Clear Wing Synchro Dragon" and "Starve Venom Fusion Dragon" respectively. With Yūya controlling "Odd-Eyes Pendulum Dragon" and "Dark Rebellion Xyz Dragon" in his Duel, all of the Four Dimension Dragons were in play at the same time, causing Yūya and his counterparts to enter Berserk Mode and synchronize again.

Users

 * Yūya Sakaki
 * Yūto
 * Yūgo
 * Yūri