Notes:

Dex Entries
Dark: "This Pokemon is blinded by light, so it wears a clay mask to cover it's eyes. It sometimes ventures outside to play pranks on people, but the glowing runes on it's body give it away."

Dark/Steel: "After years of loneliness, it has made a device enchanted with mysterious magic, allowing it to see in the bright outside world."

Dark/Fairy: "After years of seclusion, it lurks through dark forests to watch over travelers. If provoked, it traps it's enemies in a dark endless maze."

Individual Images at Source