Stickers that could be obtained by participating in Pokémon Card Gym events starting from July 1, 2023, to commemorate the hosting of the 'Pokémon World Championships 2023' in Yokohama, Japan. On the back of the sticker, there was a two-dimensional code that, when scanned, allowed participants to answer a survey. Those who completed the survey had a chance to enter a lottery, with 10 winners receiving a booster pack box as a prize.