https://youtu.be/TkghIxBxQLk
In
Yu-Gi-Oh! VRAINS, the Cyberse monsters appear to be a special kind of monster related to the
Cyberse World. When Yusaku used these monsters in his Duel against the
Knights of Hanoi, the spectators were surprised to see him possess Cyberse monsters.
[1] As stated by
Varis, through currently unknown means the Knights of Hanoi had destroyed a vast amount of them to the point they believed Cyberse monsters to be extinct.
Later on,
Varis reveals to
Yusaku that the Cyberse cards were created by the
Ignis from the
Cyberse World