>>46898244Zacian should've been Ice/Ground.
Ice is strong against Dragon and Ground is strong against Poison, making both types super effective against Eternatus.
Zamazenta should've been Fairy/Steel. Fairy is immune to Dragon and Steel is immune to Poison, making it immune to both of Eternatus's STABs.
That'd make them perfect offensive and defensive answers to Eternatus respectively, which is what they're meant to be in lore.