Koumori Dragon + Water Girl → Spike Seadra

Koumori Dragon + Metal Fish → Metal Dragon

Koumori Dragon + Mech Bass → Metal Dragon

Koumori Dragon + Turu-Purun → Spike Seadra

Koumori Dragon + Guardian of the Sea → Spike Seadra

Koumori Dragon + Aqua Snake → Spike Seadra

Koumori Dragon + 30,000-Year White Turtle → Spike Seadra

Koumori Dragon + Kappa Avenger → Spike Seadra

Koumori Dragon + Kanikabuto → Spike Seadra

Koumori Dragon + Zarigun → Spike Seadra

Koumori Dragon + Destroyer Golem → Stone D.

Koumori Dragon + Barrel Rock → Stone D.