The Pokemon Company has announced that the upcoming expansion, Crown Zenith, will be the final card set to join Pokemon TCG Online.

Near the end of 2021, Pokemon announced that Pokemon TCG Online would be shutting down in favor of the new game, Pokemon TCG Live. The older game will remain active for some time, up until the worldwide launch of Pokemon TCG Live (no concrete date set), but development will be ceased on March 1 after the release of Crown Zenith. More details on what you can expect can be found below.

Quote From The Pokemon Company

With the upcoming sunsetting of the Pokémon Trading Card Game Online, no further card set development will be supported in the game as of March 1, 2023. Pokémon TCG: Crown Zenith will be the final expansion to be incorporated into the Pokémon TCG Online in order to devote all resources to Pokémon Trading Card Game Live, which is now available in beta to players around the world on iOS and Android devices, as well as on Windows and macOS devices.

The in-game Versus Ladder reward tracks will continue to update leading up to an eventual game sunset, but no further updates will come to the Pokémon TCG Online outside of potential bug fixes. Also, the 2023 Standard format rotation and Pokémon Tool card errata will not be applied in the Pokémon TCG Online.

For more details about this and the eventual sunsetting of the Pokémon TCG Online, as well as a full list of supported Pokémon TCG Online products for 2023, please read the Pokémon TCG Online Sunset FAQ.