Pokkén Tournament DX was recently updated to version 1.3.0, adding compatibility with the Battle Pack Wave 2 DLC. Wave 2 contains Battle Pokémon Blastoise, a new Support Pokémon set featuring Mew and Celebi and additional Avatar items. The full version of game is required to use DLC. To see the new official Pokkén Tournament DX trailer for Blastoise, check out the video below:
Wave 2 of the Pokkén Tournament DX Battle Pack is here! This wave contains Battle Pokémon Blastoise, a Support Pokémon set featuring Celebi and Mew, and Avatar items.
Source: Nintendo Versus @NintendoVS