From Bulbanews, your community Pokémon newspaper.
Patch fixes exploitable glitch
A new software patch for the Nintendo 3DS eShop title Pokémon Shuffle has been released, which fixes a glitch that can be exploited to use any Pokémon in the game as a Support Pokémon, regardless of whether or not it has already been unlocked by the player. This specific glitch is all that the patch is currently known to fix.
The patch can be downloaded by using the game's Check In function, which is unlocked after clearing the 11th stage, and downloading it will award the player with one free Jewel. The Jewel will be available as a prize until March 20, 2015.
A version of the game with the patch already installed on it will be available for download in the near future, but until then, the patch is only available through Check In.