>>16513443I know it's not an evolved Carbink, but I think there is a relation due to the similarities. It may be a god/goddess of Carbinks or something like that.
Reflecting Cave is where you can catch wild Carbink right? That semi-secret room with the light shining directly to a spot on the floor at the end? I think whatever the event will do to give us Diancie will give us an item to make it appear there. And yeah, I know that Alakazamite was hidden in that spot, but the other megastones didn't have any special beams of light shining on it, so I think that spot has another meaning.