Ryu Kokki (character)
|Corresponding card||Ryu Kokki|
|WC 2006||Ruler of the Underworld|
|Video game debut||Yu-Gi-Oh! Ultimate Masters: World Championship 2006|
|Ryu Kokki (character)|
Ryu Kokki is a character version of the card "Ryu Kokki" in Yu-Gi-Oh! Ultimate Masters: World Championship 2006.
It appears as a Limited Duel opponent, challenging the player to defeat it using no monsters that are not Zombie-Type.
|Ruler of the Underworld|