The Pokémon Center Tokyo DX and Pokémon Cafe combo is set to open in Tokyo, Japan, on March 14. While there have been small Pokémon-themed cafes every now and then, this is the first permanent establishment. The official Pokémon Cafe site has been updated with a significant amount of new information. Reservations for the Pokémon Cafe have officially opened as of March 5. You can reserve up to April 5; a reservation is required in order to enter the Pokémon Cafe and can be made via the official website. You can reserve a seat, or reserve a seat and exclusive merchandise. Also every customer needs to order at least two items. The updated site also showcases new pictures of the interior and the cafe menu, which can be found here.
Source: ポケモン公式ツイッター @Pokemon_cojp