Spike Seadra + Prisman → Stone D.

Spike Seadra + Cyber Saurus → Metal Dragon

Spike Seadra + Laughing Flower → B. Dragon Jungle King

Spike Seadra + Bean Soldier → B. Dragon Jungle King

Spike Seadra + Cannon Soldier → Metal Dragon

Spike Seadra + Guardian of the Throne Room → Metal Dragon

Spike Seadra + Brave Scizzar → Metal Dragon

Spike Seadra + The Statue of Easter Island → Stone D.

Spike Seadra + Muka Muka → Stone D.

Spike Seadra + Sand Stone → Stone D.

Spike Seadra + Boulder Tortoise → Kairyu-shin

Spike Seadra + Fire Kraken → Kairyu-shin