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An '''Overlay Network''' (オーバーレイ・ネットワーク ''Ōbārei Nettowāku'') is a portal used to travel through dimensions anywhere within ''[[Yu-Gi-Oh! ZEXAL]]'' anime and [[Yu-Gi-Oh! ZEXAL (manga)|manga]] series. It can be used for communication, as the sound also travels through them. This way, the portal stays opened until a message is transmitted or conversation is finished.

The [[Barian]] race is able to do so using it to instantly teleport themselves to another place. The [[Crest]]'s on the [[Vetrix Family]] body is able to create an Overlay Network, which then dematerializes materializes its owner or another crest owner from one place and re-materializies materializes them to another place. [[Quattro]] disappeared with a wind gust, [[Trey]] with a blinding light, and [[Vetrix]] with a short blackout. In [[Yu-Gi-Oh! ZEXAL II]], the [[Different Dimension Airship]] uses the Overlay Network to travel to places such as from the inside of the [[Emperor's Key]].