There is an ancient tablet pokemon with what look to be runes on it. It is ice/rock and can be found near a city with a windmill. It has the ability Flash Freeze which causes Pokemon to become frozen when they use a physical attack on it. The pokemon's name is Bitrunic and it knows the attacks rock smash and ice beam. It looks like a grey stone rectangular slab and the runes glow icy blue normally and red when it is attacking. It's eyes are two runes that are rectangles with diagonal lines that go through them.
The next is a steel/ghost type pokemon also found near the ruins that have bitrunic. It is known as the mirror pokemon. Named Flekter. Its pokedex entry says that it can trap a person's soul within the reflection. It does evolve into a broken mirror pokemon. I do not know the name of the evolution but it has a ghost like mist holding together broken mirror shards.