And so the Sword & Shield promo era begins! The first non-Pikachu, non-Starter promo has been revealed!
[M][C][C] Metal Claw: 70 damage.
[M][C][C][C] Steel Beam: 150 damage. This Pokemon does 40 damage to itself.
Weakness: Fire (x2)
Resistance: Grass (-30)
Duraludon will be available in the next issue of CoroCoro Ichiban magazine. It is promo #030/S-P, which is far beyond any promos we currently know about.
As posted before, Resistance is back to -30.
Thanks goes to Bangiras for the translation!