Spike Seadra + Turtle Bird → Sea King Dragon

Spike Seadra + Star Boy → Kairyu-shin

Spike Seadra + Spirit of the Mountain → Kaminari Attack

Spike Seadra + Eldeen → Kaminari Attack

Spike Seadra + Mega Thunderball → Twin-headed Thunder Dragon

Spike Seadra + Corroding Shark → Skelgon

Spike Seadra + Dharma Cannon → Metal Dragon

Spike Seadra + Skelgon → Curse of Dragon

Spike Seadra + Griggle → B. Dragon Jungle King

Spike Seadra + Bone Mouse → Skelgon

Spike Seadra + Frog The Jam → Kairyu-shin

Spike Seadra + Behegon → Kairyu-shin