I thought I dreamed these up once, but then @mrtz reminded me of their existence and I’m kind of dying to know more. All I know is that Tomy has been making these interactive battle card/figurine sets since 2008 or so, and the 2014/xy cards are particularly appealing
I honestly don’t know too much about them myself. I was able to find a set and from the few listings I’ve seen, the cards are almost always in played condition. This is definitely an uncommon find if not outright rare. They are beautiful though. I’m sure there’s some elusive Japanese blog that describes how to play this game.