Pokémon Shuffle Version 1.1.2 is available for players of the game and the patch adds the Kyogre stage. Kyogre's stage will be available to play between March 9th, 2015 at 06:00 UTC until March 23rd, 2015 at 06:00 UTC. Kyogre cannot currently be caught through regular gameplay in Pokémon Shuffle.
Details of this event have been added to our Pokémon Shuffle Special Event page.
Source:
http://www.pokemonshuffle.com/en-us/connectivity#kyogre-launch