Kairyu-shin + Thunder Dragon → Twin-headed Thunder Dragon

Kairyu-shin + Metal Fish → Metal Dragon

Kairyu-shin + Mech Bass → Metal Dragon

Kairyu-shin + 30,000-Year White Turtle → Sea King Dragon

Kairyu-shin + Destroyer Golem → Stone D.

Kairyu-shin + Barrel Rock → Stone D.

Kairyu-shin + Minomushi Warrior → Stone D.

Kairyu-shin + Stone Ghost → Stone D.

Kairyu-shin + Kaminari Attack → Twin-headed Thunder Dragon

Kairyu-shin + Tripwire Beast → Twin-headed Thunder Dragon

Kairyu-shin + Bolt Escargot → Twin-headed Thunder Dragon

Kairyu-shin + Bolt Penguin → Twin-headed Thunder Dragon