Yamadron + Ooguchi → Kairyu-shin

Yamadron + Swordsman from a Foreign Land → Flame Swordsman

Yamadron + Leogun → Flame Cerebrus

Yamadron + Saber Slasher → Metal Dragon

Yamadron + Yaiba Robo → Metal Dragon

Yamadron + Giant Mech-soldier → Metal Dragon

Yamadron + Mechanical Spider → Metal Dragon

Yamadron + Bat → Metal Dragon

Yamadron + Giga-tech Wolf → Metal Dragon

Yamadron + Cyber Soldier → Metal Dragon

Yamadron + Shovel Crusher → Metal Dragon

Yamadron + Blocker → Metal Dragon