As posted a while ago, GX Ultra Shiny will feature reprinted cards from the Sun & Moon era, including Zoroark-GX, Tapu Lele-GX, Buzzwole-GX, and Zygarde-GX. Some cards will feature new artwork. The set will also have brand new cards.
Each booster box will contain one Shiny Pokemon-GX. Subway Bosses Ingo & Emmet and Battle Chatelaine will also appear as Supporter cards.
The set will release in Japan on November 2nd and feature a whopping 150 cards. Each booster pack will contain 10 cards, including one GX.