From Bulbanews, your community Pokémon newspaper.
Lucarionite Competitive Stage to return July 13
The Arceus special stage "Ultra Challenge" is now live in Pokémon Shuffle. This special stage runs until July 24, 2015. Arceus is Normal-type, and the stage is limited to 28 moves. The stage name "Ultra Challenge" contrasts to the normal stage names for powerful Legendary and Mythical Pokémon, "Great Challenge".
Additionally, the Lucarionite Competitive Stage will be run again from July 13 to 24, 2015. This will be the third time the Lucarionite will be available by Competitive Stage. Other prizes and the prize thresholds have not been announced.