of 40 cards. In Japan, it was released on April 16. Though the boosters have 8 cards rather than 11 in Japan, they cost less than regular boosters. The special feature of the series is that it includes a Stadium called Lost World, which has a revolutionary effect. However, the mini-set will not be released in the United States, but instead will be combined with the cards from the Japanese set Clash at the Summit, to make HS Triumphant, which was released in the United States in early November. Fifth Generation Sets All of the Fifth Generation sets have the words "Black and White" in their names; this comes from the Pokémon Black and Pokémon White video games present in these sets. The first set was released on April 6, 2011, and included codes that allowed purchasers to play online with an identical deck. Sixth Generation Sets The sixth generation sets have "XY" in their names. This comes from the sixth generation video games Pokémon X and Pokémon Y. Generations Generations is an extra set in the X and Y series of Pokémon cards. This set features many reprints from recent and older sets, including the First and Second Generations. Slowpoke is a reprint from Fossil and the Tauros card uses the artwork from Jungle. Pokémon-EX and Pokémon BREAK are also printed with similar style to the First Generation Sets. Seventh Generation Sets The seventh generation sets have Sun & Moon in their name. This comes from the seventh generation of video games Pokémon Sun and Moon. Sun & Moon – Shining Legends is an extra set in the Sun & Moon series of Pokémon cards. It was released on October 6, 2017, however, Pokémon Center Online had already released them if players pre-ordered from the website. This set brings back the Shining mechanics from the Second Generation sets (Neo series), with the Legendary Pokémon. Sun & Moon – Dragon Majesty is an expansion set released on September 7, 2018. The booster packs were sold as part of special collection boxes. The set features over 70 cards, including 6 Pokémon-GX cards, 2 Prism Star cards, and 6 full-art cards. Sun & Moon – Detective Pikachu is a mini set released on March 29, 2019. The booster packs were sold as part of special collection boxes. The set features 18 cards with artwork and attacks based on the Pokémon: Detective Pikachu