According to the Japanese Pokémon Global Link website as reported by Serebii.net,
7,651 more players have been hit with the 090-0212 ban wave, after being detected of having a modified game save.
This ban bars users from accessing Online Play services (Game Sync, Battle Competitions, Rating Battles, Global Missions).
Once again, The Pokémon Company has announced that they will continue their pursuit against people with edited save data.[1,2]
If you are affected by the ban, please let us know what kinds of edits you made,
so we can get a better idea what The Pokémon Company is looking for.
While we already some strong suspicions regarding the causes previously,
we urgently recommend not going online if you modified your save,
until we have more information on how these bans were triggered.