Ever since the mobile game Pokémon GO was released, the little critters have dominated the gaming world and the internet. These days no meme is safe from Pikachu and co. This November, two new main installments of the series called Pokémon Sun and Pokémon Moon are coming out for the 3DS. It comes as no surprise that the new pocket monsters are going to be added to the online trading card game for iPad and PC sooner or later. Now, the Pokémon Company has limited the potential release date. In spring 2017, the studio is planning on releasing the Sun and Moon expansion bringing brand new Pokémon GX cards to the title. The term GX is referring for special attacks and Pokémon which are entirely new for the TCG and will require new tactics.
Every Pokémon GX will feature a special GX attack that will be so powerful that it can only be used once in an entire match. Additionally, they will only possess two other attacks that will also be very powerful.
It goes without saying that the expansion brings new legendary monsters to the online game. Solgaleo and Lunala are both coming to the TCG next year.
Source: Press release