Gatekeeper + Trakadon → Cyber Saurus

Gatekeeper + Little D → Cyber Saurus

Gatekeeper + Pale Beast → Dice Armadillo

Gatekeeper + Little Chimera → Dice Armadillo

Gatekeeper + Fairy Dragon → Metal Dragon

Gatekeeper + Obese Marmot of Nefariousness → Dice Armadillo

Gatekeeper + Amazon of the Seas → Metal Fish

Gatekeeper + Armored Rat → Dice Armadillo

Gatekeeper + Mystical Sheep #1 → Dice Armadillo

Gatekeeper + Meteor Dragon → Metal Dragon

Ogre of the Black Shadow + One-eyed Shield Dragon → Koumori Dragon

Ogre of the Black Shadow + Wicked Dragon with the Ersatz Head → Koumori Dragon