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The Pokemon master Ash must rescue his mother from the encasement of a crystal tower.

The XY series is based on the events of the Generation VI games. As with the previous three series, the XY series begins with only Ash Ketchum heading off to a new region with his Pikachu; his previous companions, Iris and Cilan, have left the series. Ash's journey through the Kalos Region begins in Lumiose City, and soon he will be joined by Serena, Clemont, and Bonnie.

The mini-saga follows Satoshi venturing into an archipelago of islands called the Decolora Islands with Iris and Dent. Source: Bulbapedia

Satoshi, Iris and Dent continue their travels through the Isshu region. After successfully winning his eighth Gym Badge against Homika in Tachiwaki City, Shirona invites everyone to stay at her villa in East Isshu, where old friend Hikari is also staying, and participate in the Pokémon World Tournament Junior Cup before Satoshi participates in the Unova League. Team Rocket,…