Spike Seadra + Stone Ogre Grotto → Stone D.

Spike Seadra + Night Lizard → Kairyu-shin

Spike Seadra + Queen's Double → Sword Arm of Dragon

Spike Seadra + Trent → B. Dragon Jungle King

Spike Seadra + Queen of Autumn Leaves → B. Dragon Jungle King

Spike Seadra + Invader of the Throne → Sword Arm of Dragon

Spike Seadra + Disk Magician → Metal Dragon

Spike Seadra + Gruesome Goo → Kairyu-shin

Spike Seadra + Hyosube → Kairyu-shin

Spike Seadra + Machine Attacker → Metal Dragon

Spike Seadra + Hibikime → Sword Arm of Dragon

Spike Seadra + Dokurorider → Curse of Dragon