The Pokémon Global Link (PGL) is currently unavailable due to maintenance, which is scheduled to last until 11 p.m. EST – so hopefully it shouldn’t be for much longer. During maintenance, all services on the PGL are unavailable, including the official website, features related to Pokémon Ultra Sun & Ultra Moon and Pokémon Sun & Moon, Game Sync and Rating Battles. If you see the maintenance notice on the PGL at a time other than during the maintenance period described, this means that the site is undergoing emergency maintenance.
Pokémon Global Link currently undergoing maintenance, December 25
Pokémon Blog 
One thought on “Pokémon Global Link currently undergoing maintenance, December 25”