Why can't TPCi make Kartana have a different weakness instead of fire so I can add it to my Metagross deck and not have bad matchups against fire decks. They gave Ho-Oh GX a lighting weakness instead of water, why can't TCPi do the same thing for metal decks.
Most Steel Pokemon that have been printed in the TCG have a Fire weakness that makes sense, with the sole exception being Phantom Forced Heatran, who, for some reason, is still weak to Fire even if it should be neutral - or even immune to it thanks to Flash Fire - in the games, even though the Legends Awakened version is weak to Water.
They gave Ho-oh GX an Electric weakness because its half-Flying in the games. I don't see a reason why Kartana should have any other weakness than Fire. If you want a Metagross deck to have a somewhat easier matchup against Volcanion, just use Necrozma GX, which isn't even weak to Fire.