On April 16th, 2014, the South Korean ferry Sewol (세월호) carrying 476 people capsized and many people died in the accident.


On April 21st, 2014, TV Tokyo announced that they would be delaying the airing of XY24 - The Castle on the Seabed! Kuzumo and Dramidoro!! (海底の城！ クズモーとドラミドロ！！) as the episode featured Satoshi and friends diving underwater to look for the luxury ship "The Cussler" which was assumed to have sunk. Pokémon Get TV 28 did have the preview for XY24 though. XY25 - The Shoyo Gym Match! Pikachu VS Chigoras!! (ショウヨウジム戦！ピカチュウ対チゴラス！！) aired on April 24th, 2014 instead.

This is the message that TV Tokyo posted on the Official Pocket Monsters XY anime website: "Due to the current situation, the episode planned to be broadcast April 24th, "The Castle on the Seabed! Kuzumo and Dramidoro!!", has been temporarily put on hold. It is scheduled to be broadcast at a later date. Once an airdate has been decided, it will be announced on our website." (4/24に放送を予定していた『海底の城！クズモーとドラミドロ！！』は、都合により放送延期になりました。今後、改めて放送する予定です。日程は決まり次第、HP上等で発表します。)

TV Tokyo's official Pokémon site has also removed the list of upcoming episodes from their preview page, as the upcoming schedule is presumably not decided yet. As announced earlier, Pocket Monsters XY will not air Thursday May 1st due to a conflicting broadcast from the World Table Tennis Championships, but the exact content of Pocket Monsters airings for the rest of May is still unknown.

Sources: http://www.tv-tokyo.co.jp/program/detail/22836_201404241900.html and http://www.tv-tokyo.co.jp/anime/pokemon_xy/trailer/