Gatekeeper + Burglar → Dice Armadillo

Gatekeeper + Rainbow Marine Mermaid → Metal Fish

Gatekeeper + Milus Radiant → Dice Armadillo

Gatekeeper + Togex → Dice Armadillo

Gatekeeper + Gemini Elf → Dark Elf

Gatekeeper + Misairuzame → Metal Fish

Gatekeeper + Tongyo → Metal Fish

Gatekeeper + Skelgon → Metal Dragon

Gatekeeper + Wow Warrior → Metal Fish

Gatekeeper + Tyhone #2 → Metal Dragon

Gatekeeper + Lesser Dragon → Metal Dragon

Gatekeeper + Anthrosaurus → Cyber Saurus