>>54656196>>546562093DS online services (battles, trade, GTS even though that was already unusable) will end next year
Pokémon Bank will remain functional, for now, not forever.
The 3DS eShop shut down in March, so if you don't already have Bank and Transporter downloaded you're fucked, likewise if you didn't have any of the 3DS Virtual Console games (Celebi is once again not reliably obtainable outside of events).
But if you do have Bank downloaded you don't need to pay to use it anymore, so that's something at least.