Looking for something to play this week on your 3DS then might I suggest Pokemon Puzzle League, don’t worry I am not going to ramble on about the game I just want to say it is a puzzle game and it is Pokemon and if that is not enough for you then I highly recommend checking out the footage for the game below and seeing if it appeals to you.
Just remember the added bonus of buying the game with being able to play the Pokemon Omega Ruby and Alpha Sapphire demo. Either way check out the footage below:
https://www.youtube.com/watch?feature=player_embedded&v=1I8H3o9nxQA