Pre-registration is now open for a brand-new Team Match in Pokémon Duel. The latest in-game event has you choosing a team of either Giratina, Mega Banette or Marshadow, based on their recent UX figure designs. During the Team Match, you just play as normal online and your wins count toward your team. As you do so, you earn various rewards including the possibility of a special Time Booster (Sparkle), which has a chance of containing a new figure, this time for Shiny Sylveon. Pre-Registration runs until October 26, while the Team Match event runs from October 26 to October 29, with reward redemption being available until October 31.
Source: Serebii.net @SerebiiNet