Darkfire Dragon + Yaiba Robo → Metal Dragon

Darkfire Dragon + Giant Mech-soldier → Metal Dragon

Darkfire Dragon + Mechanical Spider → Metal Dragon

Darkfire Dragon + Bat → Metal Dragon

Darkfire Dragon + Giga-tech Wolf → Metal Dragon

Darkfire Dragon + Cyber Soldier → Metal Dragon

Darkfire Dragon + Shovel Crusher → Metal Dragon

Darkfire Dragon + Blocker → Metal Dragon

Darkfire Dragon + Blast Juggler → Metal Dragon

Darkfire Dragon + Golgoil → Metal Dragon

Darkfire Dragon + Giganto → Metal Dragon

Darkfire Dragon + Cyber-Stein → Metal Dragon