>>32439348Why not:
>Snow Warning>Drought>Electric Terrain (or Drizzle)Thematically appropriate.
Articuno creates snow, Zapdos creates thunderstorms.
I'd argue that Moltres should have Regenerator or Flash Fire, since it heals itself by dipping into volcanoes, but let's stick with the theme.
As for moves, Articuno is supposed to have very reflective wings. Mirror Shot (or even Luster Purge, if they don't mind Latios losing a signature move) would fit thematically, and give it some coverage.
Zapdos is pretty decent already, movewise, but Moltres could do with Magma Storm (again, if Game Freak doesn't care about signature moves from 4 gens ago), but Eruption could also fit.
A Burn Up-like move for Articuno would be nice, too. Moltres gets to be typeless, so why not "Defrost" for Articuno? Or a Soak variant that targets the user.
Articuno's biggest downfall is its lack of versatility. Other Ice-types get coverage moves, but Arty's stuck with Ice and Flying, and nothing else. Some Water moves could help it, especially with a type change to offset its massive weakness.