Spike Seadra + Mega Thunderball → Twin-headed Thunder Dragon

Spike Seadra + Electric Lizard → Twin-headed Thunder Dragon

Kaminari Attack + Skelgon → Twin-headed Thunder Dragon

Kaminari Attack + Tyhone #2 → Twin-headed Thunder Dragon

Kaminari Attack + Lesser Dragon → Twin-headed Thunder Dragon

Kaminari Attack + B. Dragon Jungle King → Twin-headed Thunder Dragon

Kaminari Attack + Fairy Dragon → Twin-headed Thunder Dragon

Kaminari Attack + Serpent Night Dragon → Twin-headed Thunder Dragon

Kaminari Attack + Mikazukinoyaiba → Twin-headed Thunder Dragon

Kaminari Attack + Meteor Dragon → Twin-headed Thunder Dragon

Tripwire Beast + Skelgon → Twin-headed Thunder Dragon

Tripwire Beast + Tyhone #2 → Twin-headed Thunder Dragon