So this has been out for a bit. The "puzzle" aspect is pretty basic. You chain together similar pokemon icons for a larger combo/score, "stirring" them together and then releasing your finger. Not very challenging. The shape of the field does change, I suppose, but this is mobile phone fare.
That isn't to say the game lacks quality. The art, sound effects, and music are all great (especially for a free game). But I don't think this is gonna wow any puzzle-game fans on the merit of the puzzling itself.